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Contents
- The climate of Viseu
- The best time to visit Viseu
- The worst time to visit Viseu
- Spring weather in Viseu
- Summer weather in Viseu
- Autumn weather in Viseu
- Winter weather in Viseu
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Climate and monthly weather forecast
The climate of Viseu
With consideration to the Köppen climate classification system, Viseu, Portugal possesses a warm summer Mediterranean climate, denoted as Csb. This climatic type mainly characterizes regions that reside in the western portions of continents, typically between latitudes 30°and 45°, although in Viseu's case, it is found near 40.6°latitude and -7.9°longitude.
Viseu's temperature patterns reveal a well-defined oscillation as the seasons change throughout the year. Highest average monthly temperatures, peaking at 85.3°F, tend to occur in the summertime, particularly from July to August, while cooler months are dominated by the late autumn and winter months, with an average low of 37.6°F in January. Humidity sees a similar cyclic trend, with higher percentages mainly in the colder months, particularly from November to February, reaching up to 85% in January, then gradually tapering down during spring and reaching a minimum of 57% during August.
A noteworthy characteristic in Viseu's climatic regime is the rainfall pattern. Maximum rainfall, peaking at 3.62", occurs during December and minimum rainfall, which slides to a low of 0.24", is observed during July. Despite these notable fluctuations in the rainfall amounts throughout the year, mere variations in snowfall are profoundly limited. The city experiences striking low snowfall, rarely exceeding 0.12", from January to March, whereas no snowfall has been registered from April to December. Furthermore, sunshine hours in Viseu are aplenty, especially from June reaching a high of 15 hours per day, then gradually decreasing as the year concludes.
Viseu's temperature patterns reveal a well-defined oscillation as the seasons change throughout the year. Highest average monthly temperatures, peaking at 85.3°F, tend to occur in the summertime, particularly from July to August, while cooler months are dominated by the late autumn and winter months, with an average low of 37.6°F in January. Humidity sees a similar cyclic trend, with higher percentages mainly in the colder months, particularly from November to February, reaching up to 85% in January, then gradually tapering down during spring and reaching a minimum of 57% during August.
A noteworthy characteristic in Viseu's climatic regime is the rainfall pattern. Maximum rainfall, peaking at 3.62", occurs during December and minimum rainfall, which slides to a low of 0.24", is observed during July. Despite these notable fluctuations in the rainfall amounts throughout the year, mere variations in snowfall are profoundly limited. The city experiences striking low snowfall, rarely exceeding 0.12", from January to March, whereas no snowfall has been registered from April to December. Furthermore, sunshine hours in Viseu are aplenty, especially from June reaching a high of 15 hours per day, then gradually decreasing as the year concludes.
The best time to visit Viseu
Considering the overall weather conditions, the period from May to September serves as an optimum choice to visit Viseu. These months mark the arrival of summer and extend into early autumn, characterized by pleasant temperatures oscillating from highs of 70.2°F to 85.3°F, and lows between 48.2°F and 55.9°F. Besides, these months are known to boast ample sunlight with daily sunshine hours varying from 14.5 to 14.7 hours.
Accompanied by lower humidity levels hovering between 57% and 71%, the conditions during these months are amenable to outdoor activities and sightseeing endeavors. Additionally, rainfall during this period is quite modest, notably the driest months being July and August with rainfall averages of 0.24" and 0.28" respectively. The cooling sea breezes also lend a refreshing atmosphere with average wind speeds varying between 4.6mph to 5mph.
Accompanied by lower humidity levels hovering between 57% and 71%, the conditions during these months are amenable to outdoor activities and sightseeing endeavors. Additionally, rainfall during this period is quite modest, notably the driest months being July and August with rainfall averages of 0.24" and 0.28" respectively. The cooling sea breezes also lend a refreshing atmosphere with average wind speeds varying between 4.6mph to 5mph.
The worst time to visit Viseu
Visitors are likely to find the months from November to February less favorable due to colder temperatures and increased rainfall. The average monthly temperature in this period rarely climbs above 56.1°F, with monthly lows steeply dropping to 37.6°F in January. Moreover, these months are associated with higher levels of relative humidity, scaling up to 85% in January imparting dampness to the cold weather.
Rainfall typically intensifies during these months, with average monthly measurements tallying up to 3.19" in November and peaking at 3.62" in December. Alongside, the number of sunshine hours dwindles, averaging between 9.3 and 9.9 hours daily during this winter season whose grip is also marked with occasional snowfall incidents, albeit modest in nature with maximum snowfall reaching only 0.12" in January.
Rainfall typically intensifies during these months, with average monthly measurements tallying up to 3.19" in November and peaking at 3.62" in December. Alongside, the number of sunshine hours dwindles, averaging between 9.3 and 9.9 hours daily during this winter season whose grip is also marked with occasional snowfall incidents, albeit modest in nature with maximum snowfall reaching only 0.12" in January.
Spring weather in Viseu
Spring, extending from March through May, in Viseu unfolds with anticipated warmth, as temperatures gradually ascend from a monthly average low of 39.7°F to 48.2°F, and highs fluctuating between 58.3°F and 70.2°F. This transition of weather from the lingering cold of the winter months creates a refreshing ambience and revives the natural beauty of the city.
Rainfall averages for spring fall within a rather snug range of 1.22" to 2.4", thereby not disrupting the warming trend of temperatures. This balance of moderately warm temperatures and modest rainfall fosters the blooming of flora, making it a delightful sight to spectate.
Rainfall averages for spring fall within a rather snug range of 1.22" to 2.4", thereby not disrupting the warming trend of temperatures. This balance of moderately warm temperatures and modest rainfall fosters the blooming of flora, making it a delightful sight to spectate.
Summer weather in Viseu
Viseu's summer initiates in June and extends to August, marked by a significant escalation in temperatures. The daily average high reaches its pinnacle at 85.3°F during August while the average lows remain comfortingly warm, ranging from 52.2°F to 56.3°F. The relative humidity decreases gradually during this period, with the lowest measurement being 57% in August.
Rainfall minimizes considerably during the summer months, bottoming out at a low of 0.24" in July, thus creating a predominantly dry and warm atmosphere. This balmy climate coupled with ample sunshine and vibrant summer tones makes for great sightseeing and outdoor explorations.
Rainfall minimizes considerably during the summer months, bottoming out at a low of 0.24" in July, thus creating a predominantly dry and warm atmosphere. This balmy climate coupled with ample sunshine and vibrant summer tones makes for great sightseeing and outdoor explorations.
Autumn weather in Viseu
Autumn in Viseu, lasting from September through November, witnesses a gradual drop in temperatures. Average highs steeply decline from a summertime 79.7°F in September to 56.1°F in November, and the lows also present a downtrend dipping from 54.5°F to 43.2°F. A significant uptick in rainfall occurs during this season, especially in November, where average rainfall swells to 3.19".
While the autumn months exhibit a noticeable increase in cloud cover, periods of sunshine still persist with daily average sunshine hours decreasing from 12.5 hours in September to 9.9 hours in November. The shifting weather in combination with the picturesque fall foliage makes this period appealing in a unique way.
While the autumn months exhibit a noticeable increase in cloud cover, periods of sunshine still persist with daily average sunshine hours decreasing from 12.5 hours in September to 9.9 hours in November. The shifting weather in combination with the picturesque fall foliage makes this period appealing in a unique way.
Winter weather in Viseu
Winter takes hold of Viseu from December to February. It invites a considerably cold atmosphere with average low temperatures ranging from 37.6°F in January to 39.6°F in February and average high remaining within the vicinity of 51.3°F in December to 52.9°F in February.
Despite bearing an increased cloud cover during these months, sunshine is far from scarce with daily average sunshine hours staying close to 9.3 hours. Rainfall is relatively high, peaking at 3.62" in December. Moreover, while Viseu does technically observe snowfall during winter, the events are sparse and the quantity of snow rarely exceeds 0.12" per event.
Despite bearing an increased cloud cover during these months, sunshine is far from scarce with daily average sunshine hours staying close to 9.3 hours. Rainfall is relatively high, peaking at 3.62" in December. Moreover, while Viseu does technically observe snowfall during winter, the events are sparse and the quantity of snow rarely exceeds 0.12" per event.
Weather in January
January ushers in the new year with cooler temperatures in Viseu, Portugal, along with a fresh and moist atmosphere due to rainfall. Morning fog might be witnessed, owing to the high relative humidity of 85%. The city experiences its highest rainfall during January with a whopping 3.62" rain showers. Weather in January »
Weather in February
Transitioning from January, the month of February brings slight temperature enhancements as Viseu ventures into the end of winters. Snowfall continues to cloak the city with a magic of its own, enticing any lover of cold weather. Weather in February »
Weather in March
March signals the arrival of Spring in Viseu, contributing a renewed energy to the city. Considerably warmer days start making their presence known. Notably, the thickness of cloud cover reduces from 52% in February to 45% in March, allowing broader sunlit hours. Weather in March »
Weather in April
April witnesses a significant increase in the temperature, indicating a definite arrival of spring. The month also brings a decrease in cloud cover, painting more clear skies throughout Viseu. The average wind speed decreases to 5mph contributing to calmer days. Weather in April »
Weather in May
May marks a drastic change in the weather scenario of Viseu, as the city starts to warm up considerably. This month is a transition between the mildness of spring and the approaching heat of summer. Due to the increased temperatures, there is no snowfall recorded during this month. Weather in May »
Weather in June
June is a precursor to the summer season in Viseu, demonstrating warmer days with increased sunshine hours. Pleasant weather dominates, making it an ideal time for sightseeing in the city. The daylight hours increase substantially from 14.5 hours in May to 15 hours in June. Weather in June »
Weather in July
July presents the peak of summer in Viseu, with noticeably high temperatures. The heat remains persistently high during the days and even during the nights. With a high UV index of 6, sun protection becomes a necessity in July. Remarkably, the rainfall frequency drops to a minimum this month, recording a low of 4.3 rainy days. Weather in July »
Weather in August
August continues the summer trend from July, with high temperatures prevalent throughout the day and night. Clear skies dominate this month, attributing to reduced cloud cover. Coupled with the generally warm weather, the city records the highest average temperature of 85.3°F, making August the hottest month in Viseu. Weather in August »
Weather in September
September comes with a gentle dip in temperatures, signalling the coming of the fall season. The weather remains relatively dry, with a minor increase in the number of rainy days in contrast to August. The daylight hours begin to shorten from 14.7 hours in August to 12.5 hours in September, indicating the approach of shorter days. Weather in September »
Weather in October
October marks a further decrease in temperatures as the fall season fully arrives in Viseu. Compared to September, the daylight hours shorten to 11.1 hours in October. The cloud cover rises, painting beautiful autumnal skies across the city. Weather in October »
Weather in November
November shows a further transition into the colder months with a drop in temperatures. As winter looms, this month also witnesses an increase in rainfall. November sees an increase in the average wind speed from 4.8mph in October to 5.2mph. Weather in November »
Weather in December
December brings in the winters, along with the holiday cheer in Viseu. Snowfall makes a subtle appearance, adding to the festive ambiance. The average wind speed holds steady at 5.3mph, consistent with the wind speed of November. Weather in December »
Updated: Feb 2, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Viseu?
Viseu records the coldest temperatures in January, averaging a high of 51.3°F and a low of 37.6°F.
What is the most humid month in Viseu?
With an average relative humidity of 85%, January is the most humid month.
How many days does it rain in Viseu?
Throughout the year, in Viseu, Portugal, there are 125.4 rainfall days, and 21.77" of precipitation is accumulated.
When does it snow in Viseu?
January through March and November are months with snowfall.
What is the snowiest month in Viseu?
The months with the most snowfall are January and February, with an average 0.12" of accumulated snow.
How much does it snow in Viseu?
In Viseu, Portugal, during the entire year, snow falls for 1.1 days and aggregates up to 0.35" of snow.
What is the month with the least sunshine in Viseu?
With an average of 4.7h of sunshine, January has the least sunshine of the year.
When is the lowest UV index in Viseu?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Viseu, Portugal.
When it does not snow in Viseu?
In Viseu, Portugal, snow does not fall in April through October and December.
When are the longest days in Viseu?
June has the longest days of the year in Viseu, with an average of 15h and 0min of daylight.
What is the driest month in Viseu?
The month with the least rainfall is July, when the rain falls for 4.3 days and typically collects 0.24" of precipitation.
What month has the most sunshine in Viseu?
With an average of 11.5h of sunshine, July has the most sunshine of the year in Viseu, Portugal.
When is the highest UV index in Viseu?
July and August, with an average maximum UV index of 6, are months with the highest UV index in Viseu, Portugal.
What is the hottest time of year in Viseu?
In Viseu, Portugal, the average highest temperatures are observed in August, with a high of 85.3°F and a low of 56.3°F.
What is the least humid month in Viseu?
August is the least humid month, with an average relative humidity of 57%.
When is Daylight Saving Time (DST) in Viseu?
On Sunday, 27. October 2024, at 02:00, Daylight Saving Time ends in Viseu, Portugal, and the time zone changes from WEST to WET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 01:00, and the time zone reverts from WET to WEST.
What is the wettest month in Viseu?
The month with the most rainfall is December, when the rain falls for 11.5 days and typically aggregates up to 3.62" of precipitation.
What is the month with the shortest days in Viseu?
The month with the shortest days in Viseu is December, with an average of 9h and 18min of daylight.
Average temperature
Viseu, Portugal
The warmest month (with the highest average high temperature) is August (85.3°F).
The month with the lowest average high temperature is January (51.3°F).
The month with the highest average low temperature is August (56.3°F).
The coldest month (with the lowest average low temperature) is January (37.6°F).
Average pressure
Viseu, Portugal
- Average pressure in January:
30.18"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
30.02"Hg
- Average pressure in July:
30.01"Hg - Average pressure in August:
30.01"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.04"Hg - Average pressure in December:
30.21"Hg
The month with the highest atmospheric pressure is December (30.21"Hg).
The month with the lowest atmospheric pressure is April (29.98"Hg).
Average wind speed
Viseu, Portugal
- Average wind speed in January:
5.3mph - Average wind speed in February:
5.6mph - Average wind speed in March:
5.7mph - Average wind speed in April:
5mph - Average wind speed in May:
5mph - Average wind speed in June:
4.7mph
- Average wind speed in July:
4.6mph - Average wind speed in August:
4.6mph - Average wind speed in September:
4.3mph - Average wind speed in October:
4.8mph - Average wind speed in November:
5.2mph - Average wind speed in December:
5.3mph
The windiest month (with the highest average wind speed) is March (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).
Average humidity
Viseu, Portugal
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (57%).
Average rainfall
Viseu, Portugal
- Average rainfall in January:
2.83" - Average rainfall in February:
2.17" - Average rainfall in March:
2.4" - Average rainfall in April:
2.36" - Average rainfall in May:
1.22" - Average rainfall in June:
0.67"
- Average rainfall in July:
0.24" - Average rainfall in August:
0.28" - Average rainfall in September:
0.83" - Average rainfall in October:
1.97" - Average rainfall in November:
3.19" - Average rainfall in December:
3.62"
The wettest month (with the highest rainfall) is December (3.62").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days
Viseu, Portugal
- Average rainfall days in January:
13.8 days - Average rainfall days in February:
11.3 days - Average rainfall days in March:
14.8 days - Average rainfall days in April:
15.4 days - Average rainfall days in May:
10.9 days - Average rainfall days in June:
7.2 days
- Average rainfall days in July:
4.3 days - Average rainfall days in August:
3.3 days - Average rainfall days in September:
6.2 days - Average rainfall days in October:
11.2 days - Average rainfall days in November:
15.5 days - Average rainfall days in December:
11.5 days
The month with the highest number of rainy days is November (15.5 days).
The month with the least rainy days is August (3.3 days).
Average snowfall
Viseu, Portugal
The months with the highest snowfall are January and February (0.12").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").
Average snowfall days
Viseu, Portugal
- Average snowfall days in January:
0.4 days - Average snowfall days in February:
0.3 days - Average snowfall days in March:
0.2 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.1 days - Average snowfall days in December:
0.1 days
The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Viseu, Portugal
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
6h and 1min - Average sunshine in March:
7h and 1min - Average sunshine in April:
7h and 5min - Average sunshine in May:
9h and 4min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
11h and 3min - Average sunshine in August:
11h and 2min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 3min - Average sunshine in November:
5h and 1min - Average sunshine in December:
5h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Viseu, Portugal
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
15.6 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
13 days - Average sunshine days in May:
18.3 days - Average sunshine days in June:
20.8 days
- Average sunshine days in July:
26.2 days - Average sunshine days in August:
26.8 days - Average sunshine days in September:
22.9 days - Average sunshine days in October:
18.6 days - Average sunshine days in November:
13.5 days - Average sunshine days in December:
18.3 days
The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is April (13 days).
Average UV index
Viseu, Portugal
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Viseu, Portugal
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 17).
Average visibility
Viseu, Portugal
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January and November (4mi).
