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Contents
- The climate of Saint Johns
- The best time to visit Saint Johns
- The worst time to visit Saint Johns
- Spring weather in Saint Johns
- Summer weather in Saint Johns
- Autumn weather in Saint Johns
- Winter weather in Saint Johns
- 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
The climate of Saint Johns
Saint Johns, situated on the Isle of Man, falls under the Marine west coast, warm summer Köppen climate classification, known as Cfb. The climate conditions in this locale display a blend of temperate maritime influences characterized by moderate temperature peaks and troughs that do not vary significantly throughout the year. Saint Johns experiences average high temperatures from 7.4°C (45.3°F) in February to 15.9°C (60.6°F) in August, while the average lows extend from 5.2°C (41.4°F) in February to 13.8°C (56.8°F) in August.
Monthly rainfall in Saint Johns ranges from 24mm (0.94") in April and May to 63mm (2.48") in November, with a shift in pattern noticeable throughout the year. The area witnesses the maximum number of rainy days in November while the least fall in February. Interestingly, seldom episodes of snowfall can be observed from November to March, registering a peak in March at 16mm (0.63").
The length of daylight hours in Saint Johns demonstrates a clear annual cycle, extending from a low of 7.5 hours witnessed in December to a high of 17.1 hours recorded in June. The monthly available sunshine hours follow a similar trend, ranging from a low of 3.8 hours from December to January to a high of 8.2 hours in May. This further validates the typical maritime climate pattern.
Monthly rainfall in Saint Johns ranges from 24mm (0.94") in April and May to 63mm (2.48") in November, with a shift in pattern noticeable throughout the year. The area witnesses the maximum number of rainy days in November while the least fall in February. Interestingly, seldom episodes of snowfall can be observed from November to March, registering a peak in March at 16mm (0.63").
The length of daylight hours in Saint Johns demonstrates a clear annual cycle, extending from a low of 7.5 hours witnessed in December to a high of 17.1 hours recorded in June. The monthly available sunshine hours follow a similar trend, ranging from a low of 3.8 hours from December to January to a high of 8.2 hours in May. This further validates the typical maritime climate pattern.
The best time to visit Saint Johns
Based on detailed observation of climatological data and visitor preferences, the best time to visit Saint Johns would be during the late spring to early summer, from May to June. During this period, the city experiences moderate temperatures ranging from highs of 11.6°C (52.9°F) to 13.9°C (57°F) and lows from 9.1°C (48.4°F) to 11.9°C (53.4°F). Additionally, these months enjoy the lengthiest daylight hours, around 16 to 17.1 hours, and maximum sunshine hours, from 8.1 hours to 8.2 hours. Hence, visitors can leverage longer daylight hours and favorable temperatures for tourist activities.
The worst time to visit Saint Johns
Conversely, it would be less desirable to visit Saint Johns in the winter months of December, January and February. Apart from the chilling temperatures dropping to as low as 5.2°C (41.4°F) in February, the available daylight hours shrink to a minimum from 7.5 to 9.8 hours. The sunshine hours also dip to a low of 3.8 to 3.9 hours and there is a marked increase in rainfall and snowfall during these months, which could impact outdoor activities and travel plans.
Spring weather in Saint Johns
In Saint Johns, spring rolls in by March and extends till May. An upward inclination in weather warmth can be noted, with temperatures ranging from 7.9°C (46.2°F) to 11.6°C (52.9°F). The daylight and sunshine hours also undergo a significant increase, thereby marking improved visibility conditions. However, a slight increase in rainfall reaching 36mm (1.42") in March is notable.
Summer weather in Saint Johns
Summers in Saint Johns, beginning from June and ending in August, are mild and temperate. The city witnesses its warmest temperatures during this season, with average temperatures hovering between 13.9°C (57°F) and 15.9°C (60.6°F). Long daylight hours averaging from 16.6 to 17.1 hours and ample sunshine around 8.1 hours add more appeal to the summer climate in this coastal city.
Autumn weather in Saint Johns
The arrival of autumn brings a steady decline in daily temperatures and daylight hours in Saint Johns. This change in weather pattern from September to November causes thermometers to register temperatures between 11°C (51.8°F) and 15.2°C (59.4°F), accompanied by a gradual reduction in daylight hours. October and November also observe increased rainfall, nearing its annual peak, affecting visibility and outdoor activities.
Winter weather in Saint Johns
Often described as chilly and shorter, winters in Saint Johns follow a standard pattern of the maritime climate. Average high and low temperatures swing between the range of 7.4°C (45.3°F) to 9.3°C (48.7°F) and 5.2°C (41.4°F) to 7.1°C (44.8°F) respectively from December to February. December witnesses the minimum daylight hours of 7.5, with sunshine hours also dipping down to 3.8. Snowfall is not uncommon in these months, with the heaviest snowfall recorded in February at 12mm (0.47").
Weather in January
January in Saint Johns, Isle of Man, presents a chilly yet still bearable environment characteristic of the islands location. Prevailing weather conditions are typically overcast skies with occasional light rain. Snowfall at 3mm (0.12") is recorded but rarely constitutes a major concern for residents. Weather in January »
Weather in February
Rising just slightly from January, February weather registers an increase in snowfall to 12mm (0.47"), as fleeting flakes of winter’s firm hold on the island remain. The rest of the weather conditions remain relatively stable, maintaining the overcast and high humidity conditions from the previous month. Weather in February »
Weather in March
March marks the true initiation of spring in Saint Johns, as longer daylight hours become apparent. The weather in this month is noticeably milder, with the snowfall dropping off considerably to a light dusting of 16mm (0.63"). This shift in climate allows for a higher visibility throughout the island, a marked change from the winter months. Weather in March »
Weather in April
As the year continues to progress into the heart of spring, April presents a visibly warmer and brighter weather pattern in Saint Johns. Rainfall hits a new low of 24mm (0.94"), significantly drier compared to the previous months. Weather in April »
Weather in May
May introduces summer to Saint Johns, marking a noticeable increase in warmth and sunlight but also bringing in heavier rainfall at 43mm (1.69"). Longer daylight hours and higher UV index signal the start of the island's relatively tame, but nonetheless welcomed, summer. Weather in May »
Weather in June
With the arrival of June, Saint Johns hits the high style of summer. Temperature reaches its peak at 15.7°C (60.3°F), marking it as the onset of the warmest time of the year. The increase in relative humidity to 83% while noticeable is not overly uncomfortable, leading to warm, pleasant days. Weather in June »
Weather in July
July carries forward the weather patterns from June, peaking at the high of 15.9°C (60.6°F), maintaining the warmth that is characteristic of the summer months in Saint Johns. The light breeze of 20.3km/h (12.6mph) provides a refreshing respite from the mildly intense heat. Weather in July »
Weather in August
August in Saint Johns brings some subtle changes, with the temperature marginally dropping to 15.2°C (59.4°F) as a tinet towards the looming months of fall. Rainfall takes a notable upturn hitting 52mm (2.05"), the highest so far in the year. Weather in August »
Weather in September
In September, fall truly begins to set in across Saint Johns. Temperatures continue to slide from August levels, forecasting the steady onset of chillier weather. As the rainfall continues at a steady 37mm (1.46"), residents start to experience fewer hours of daylight, with earlier sunsets and later dawns. Weather in September »
Weather in October
October brings another significant change in weather in Saint Johns, with its high-speed winds reaching 29.5km/h (18.3mph). It has the highest number of rainy days, 18 in total. However, despite being a wet month with high humidity, fluctuations in temperature remain moderate, and fall hasn't yet given way to the biting cold of the winter season. Weather in October »
Weather in November
November in Saint Johns is typically a colder month, with temperatures dropping off significantly from the levels registered in October. Notably, this month brings back the vistige of winter with a snowfall of 5mm (0.2"). Accompanied by the highest rainfall of 63mm (2.48") for the year, November climate represents a transition from autumn to winter. Weather in November »
Weather in December
December ushers in the winter season in full swing for Saint Johns, with temperatures consistently falling to a low average of 7.1°C (44.8°F). Highest snowfall registered at 10mm (0.39") during this month, certainly highlights the onset of cold and snowy winter conditions. Weather in December »
Updated: Jan 25, 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
How much does it rain in Saint Johns?
Throughout the year, in Saint Johns, there are 185.3 rainfall days, and 494mm (19.45") of precipitation is accumulated.
When does it snow in Saint Johns?
Months with snowfall in Saint Johns, Isle of Man, are January through April, November and December.
How much does it snow in Saint Johns?
Throughout the year, in Saint Johns, there are 5.1 snowfall days, and 47mm (1.85") of snow is accumulated.
What is the month with the least sunshine in Saint Johns?
The months with the least sunshine are January and November, with an average of 3.8h of sunshine.
When is the lowest UV index in Saint Johns?
The months with the lowest UV index are January through March, with an average maximum UV index of 2.
What are the coldest months in Saint Johns?
In Saint Johns, February is the coldest month, with temperatures averaging a high of 7.4°C (45.3°F) and a low of 5.2°C (41.4°F).
What is the snowiest month in Saint Johns?
March is the month with the most snowfall in Saint Johns. Snow falls for 0.8 days and accumulates 16mm (0.63") of snow.
What is the driest month in Saint Johns?
April and May are months with the least rain in Saint Johns when the rain falls for 13.3 days and typically aggregates up to 24mm (0.94") of rain.
When it does not snow in Saint Johns?
In Saint Johns, snow does not fall in May through October.
What month has the most sunshine in Saint Johns?
The month with the most sunshine in Saint Johns is May, with an average of 8.2h of sunshine.
What are the months with the highest UV index in Saint Johns?
The months with the highest UV index in Saint Johns, Isle of Man, are May through September, with an average maximum UV index of 4.
When are the longest days in Saint Johns?
June has the longest days of the year, with an average of 17h and 6min of daylight.
What is the most humid month in Saint Johns?
July is the most humid month in Saint Johns, Isle of Man, with an average relative humidity of 84%.
What is the hottest time of year in Saint Johns?
August, with average temperatures reaching a high of 15.9°C (60.6°F) and a low of 13.8°C (56.8°F), is the warmest month.
When is Daylight Saving Time (DST) in Saint Johns?
On Sunday, 27. October 2024, at 02:00, Daylight Saving Time ends, and the time zone changes from BST to GMT. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 01:00, and the time zone reverts from GMT to BST.
What is the least humid month in Saint Johns?
The least humid month is November, with an average relative humidity of 77%.
What is the rainiest month in Saint Johns?
The month with the most rainfall is November, when the rain falls for 19.6 days and typically aggregates up to 63mm (2.48") of precipitation.
What is the month with the shortest days in Saint Johns?
December has the shortest days of the year, with an average of 7h and 30min of daylight.
Average temperature
Saint Johns, Isle of Man
The warmest month (with the highest average high temperature) is August (15.9°C).
The month with the lowest average high temperature is February (7.4°C).
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is February (5.2°C).
Average pressure
Saint Johns, Isle of Man
- Average pressure in January:
1010.9mbar - Average pressure in February:
1010.6mbar - Average pressure in March:
1013.7mbar - Average pressure in April:
1014.8mbar - Average pressure in May:
1015.9mbar - Average pressure in June:
1015mbar
- Average pressure in July:
1013.5mbar - Average pressure in August:
1012.4mbar - Average pressure in September:
1014.7mbar - Average pressure in October:
1012.6mbar - Average pressure in November:
1007.9mbar - Average pressure in December:
1010.2mbar
The month with the highest atmospheric pressure is May (1015.9mbar).
The month with the lowest atmospheric pressure is November (1007.9mbar).
Average wind speed
Saint Johns, Isle of Man
- Average wind speed in January:
33km/h - Average wind speed in February:
30.8km/h - Average wind speed in March:
26.7km/h - Average wind speed in April:
23.2km/h - Average wind speed in May:
23km/h - Average wind speed in June:
19.7km/h
- Average wind speed in July:
20.3km/h - Average wind speed in August:
23.8km/h - Average wind speed in September:
27.2km/h - Average wind speed in October:
29.5km/h - Average wind speed in November:
33km/h - Average wind speed in December:
34.4km/h
The windiest month (with the highest average wind speed) is December (34.4km/h).
The calmest month (with the lowest average wind speed) is June (19.7km/h).
Average humidity
Saint Johns, Isle of Man
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is November (77%).
Average rainfall
Saint Johns, Isle of Man
The wettest month (with the highest rainfall) is November (63mm).
The driest months (with the least rainfall) are April and May (24mm).
Average rainfall days
Saint Johns, Isle of Man
- Average rainfall days in January:
16 days - Average rainfall days in February:
12.5 days - Average rainfall days in March:
13.4 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
12.6 days - Average rainfall days in June:
13.5 days
- Average rainfall days in July:
17.5 days - Average rainfall days in August:
17 days - Average rainfall days in September:
14 days - Average rainfall days in October:
18 days - Average rainfall days in November:
19.6 days - Average rainfall days in December:
17.9 days
The month with the highest number of rainy days is November (19.6 days).
The month with the least rainy days is February (12.5 days).
Average snowfall
Saint Johns, Isle of Man
The month with the highest snowfall is March (16mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days
Saint Johns, Isle of Man
- Average snowfall days in January:
1.1 days - Average snowfall days in February:
1.3 days - Average snowfall days in March:
0.8 days - Average snowfall days in April:
0.2 days - Average snowfall days in May:
0.1 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:
0.5 days - Average snowfall days in December:
1.1 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Saint Johns, Isle of Man
- Average daylight in January:
8h and 0min - Average daylight in February:
9h and 5min - Average daylight in March:
11h and 5min - Average daylight in April:
14h and 1min - Average daylight in May:
16h and 0min - Average daylight in June:
17h and 1min
- Average daylight in July:
16h and 4min - Average daylight in August:
14h and 5min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 3min - Average daylight in November:
8h and 3min - Average daylight in December:
7h and 3min
The month with the longest days is June (Average daylight: 17h and 6min).
The month with the shortest days is December (Average daylight: 7h and 30min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
3h and 5min - Average sunshine in March:
5h and 5min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 1min - Average sunshine in June:
8h and 1min
- Average sunshine in July:
8h and 0min - Average sunshine in August:
7h and 4min - Average sunshine in September:
7h and 0min - Average sunshine in October:
4h and 1min - Average sunshine in November:
3h and 5min - Average sunshine in December:
3h and 5min
The month with the most sunshine is May (Average sunshine: 8h and 12min).
The months with the least sunshine are January and November (Average sunshine: 3h and 48min).
Average sunshine days
Saint Johns, Isle of Man
- Average sunshine days in January:
11.5 days - Average sunshine days in February:
11.6 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
15 days - Average sunshine days in May:
16.6 days - Average sunshine days in June:
15.3 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
10.8 days - Average sunshine days in September:
13.4 days - Average sunshine days in October:
9.4 days - Average sunshine days in November:
7.5 days - Average sunshine days in December:
9 days
The month with the most sunshine days is May (16.6 days).
The month with the least sunshine days is November (7.5 days).
Average UV index
Saint Johns, Isle of Man
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February and March (UV index 2).
Average cloud cover
Saint Johns, Isle of Man
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is May (Cloud cover 46).
Average visibility
Saint Johns, Isle of Man
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Saint Johns, Isle of Man
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