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Contents
- The climate of Montreal
- The best time to visit Montreal
- The worst time to visit Montreal
- Spring weather in Montreal
- Summer weather in Montreal
- Autumn weather in Montreal
- Winter weather in Montreal
- 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
An extension of the St. Florence river with a far view of the city of Montreal, Canada
The climate of Montreal
Positioned in the eastern part of Canada, Montreal claims a Dfb Köppen climate classification. This denotes a humid continental climate, characterized by no dry season yet with a warm summer. This city's profound seasonal variations attribute to its distinctive geographical location.
Temperature peaks between July and August, with an average high of 25.8°C (78.4°F) and 24.8°C (76.6°F), respectively. However, their shift is rather dramatic, plummeting from 20.8°C (69.4°F) in September to a chilling -2.2°C (28°F) by December. Climatic conditions in Montreal are typically freezing in the winter months, with the lowest average temperatures of -13.1°C (8.4°F) observed in January. Montreal's average humidity fluctuates slightly throughout the year, keeping between 73% and 90%.
Notably, Montreal's rainfall is quite consistent year-round, with August showing the highest average of 85mm (3.35") and September exhibiting the lowest at 55mm (2.17"). Such rain disposition influences the count of rainy days, which stretches from 10.3 days in March to a peak of 17.8 days in both May and July. Snowfall, on the other hand, starts in November with an average depth of 118mm (4.65"), peaking in January and February at 293mm (11.54") and 280mm (11.02"), respectively. As might be expected, the number of snowfall days also dramatically increases during the winter months.
Temperature peaks between July and August, with an average high of 25.8°C (78.4°F) and 24.8°C (76.6°F), respectively. However, their shift is rather dramatic, plummeting from 20.8°C (69.4°F) in September to a chilling -2.2°C (28°F) by December. Climatic conditions in Montreal are typically freezing in the winter months, with the lowest average temperatures of -13.1°C (8.4°F) observed in January. Montreal's average humidity fluctuates slightly throughout the year, keeping between 73% and 90%.
Notably, Montreal's rainfall is quite consistent year-round, with August showing the highest average of 85mm (3.35") and September exhibiting the lowest at 55mm (2.17"). Such rain disposition influences the count of rainy days, which stretches from 10.3 days in March to a peak of 17.8 days in both May and July. Snowfall, on the other hand, starts in November with an average depth of 118mm (4.65"), peaking in January and February at 293mm (11.54") and 280mm (11.02"), respectively. As might be expected, the number of snowfall days also dramatically increases during the winter months.
The best time to visit Montreal
Examine the figures for temperature, sunlight hours, UV index, and rainfall, one can determine that the optimal time to visit Montreal is from June to August. Summers in Montreal flaunt a lovely warmth, with average high temperatures hovering around 22.2°C (72°F) in June, 25.8°C (78.4°F) in July, and 24.8°C (76.6°F) in August. Visitors can also revel in extended daylight, from 15.6 hours in June to 14.1 hours in August, and a generous dosage of sunshine spanning from 8.7 hours to 9.9 hours. Moreover, these months register moderate rainfall compared to other months, maintaining a visitor's excursion largely uninterrupted.
The worst time to visit Montreal
Conversely, the least favorable time to visit Montreal falls between January and February. These winter months record the lowest maximum temperatures, peaking at a chilly -4.1°C (24.6°F) and -5.8°C (21.6°F), respectively. The shortest days also occur during these months, with only 9.2 to 10.4 hours of daylight, considerably lesser sunshine on average per day, and a low UV index. Moreover, the heavy snowfall during these months, with up to 280mm (11.02") to 293mm (11.54") of snow recorded in each month, can pose travel difficulties.
Spring weather in Montreal
Spring in Montreal, which spans from March to May, initiates with a mildly cold atmosphere in March and warms up by May. It kicks off with an average high temperature of 1.2°C (34.2°F) in March, gradually rising to 18.4°C (65.1°F) in May. A striking rise in daily sunlight hours is noticeable, from 12 hours to 14.9 hours. Simultaneously, rainfall amounts increase over the spring period, with March's 68mm (2.68") rising to May's 85mm (3.35").
Summer weather in Montreal
Summer months in Montreal, extending from June to August, are typically warm with plentiful sunshine. A gradual decline in temperatures is visible from the peak in July at 25.8°C (78.4°F) to a slightly cooler 24.8°C (76.6°F) by August. There's a hike in rainfall over summer, ranging from 75mm (2.95") in June to 78mm (3.07") in August. Later summer months also witness a slight increase in relative humidity, up to 76%.
Autumn weather in Montreal
Autumn showcases a significant drop in temperatures, from 20.8°C (69.4°F) in September to a nippy 5.1°C (41.2°F) by November. Daylight hours shrink swiftly from September's 12.5 hours down to November's 9.5 hours. Rainfall patterns in autumn vary, with 55mm (2.17") in September, spiking up to 84mm (3.31") in October and then a drop to 69mm (2.72") in November.
Winter weather in Montreal
Winter in Montreal is bitterly cold, with December attaining an average high of -2.2°C (28°F), further dipping to -5.8°C (21.6°F) in January and moderating slightly to -4.1°C (24.6°F) in February. Daylight hours are shortest during winter, picking up slightly from the 8.8 hours in December to 9.2 hours in January. Montreal winters host heavy snowfall, hitting a high of 293mm (11.54") in January. The winter season also sees the highest number of snowfall days, notably in January with 18.3 days.
Weather in January
January in Montreal, Canada, is a winter month that embodies frigid temperatures and high snowfall levels. The weather conditions cause frosty mornings with an average low temperature of -13.1°C (8.4°F), adding a fair amount of chill to the air. Weather in January »
Weather in February
Though February carries the continued chill of January, there is a slight rise in the average high and low temperatures to -4.1°C (24.6°F) and -11.8°C (10.8°F), respectively. Compared to January, February gets less snow at 280mm (11.02") falling over 17.5 days. Weather in February »
Weather in March
With the arrival of March, Montreal starts thawing from winter's grip, and the average high temperature crosses into the positive territory at 1.2°C (34.2°F). The month witnesses a significant drop in snowfall from February's 280mm (11.02") to 158mm (6.22"). Weather in March »
Weather in April
Montreal begins to embrace the signs of spring in April. There is a substantial jump in the average high temperature from March's 1.2°C (34.2°F) to April's 9.9°C (49.8°F). In April, snowfall plunges drastically to just 56mm (2.2") over 4.5 days, signaling the end of the intense cold months. Weather in April »
Weather in May
May in Montreal welcomes the arrival of summer with an average high temperature jump to a pleasant 18.4°C (65.1°F). It is the transition month when snowfall finally comes to a halt, with only 1mm (0.04") of snow recorded for the entire month. Weather in May »
Weather in June
The increasing temperature trend continues in June, with the average high reaching a warm 22.2°C (72°F) mark. June is the first month completely devoid of snowfall, meaning the outdoor temperature is warm enough for a variety of activities. Weather in June »
Weather in July
July is the hottest month in Montreal with an average high temperature soaring to 25.8°C (78.4°F). This period, however, has fewer rainfall days at 17.8 compared to June’s 17.5, making it relatively dry despite being the warmest. Weather in July »
Weather in August
Despite a slight decline from July’s high, August's average high temperature still lingers at a warm 24.8°C (76.6°F). Day-to-day weather in Montreal in August is comparable to how it was in July. The days continue to be warm, encouraging participation in water-based activities and park visits. Weather in August »
Weather in September
September marks the transition from summer to autumn, with temperature dipping to a comfortable high average of 20.8°C (69.4°F). Montreal in September is different from August, with cooler temperatures and less rainfall from 78mm (3.07") to 55mm (2.17"). Weather in September »
Weather in October
Montreal experiences significant cooling with October's average high temperature lowering to 12.8°C (55°F) from September's 20.8°C (69.4°F). This time of year, the city is beautifully adorned in vibrant fall foliage, eliciting a picturesque view. Weather in October »
Weather in November
November is a harbinger of the coming winter, with the average high temperature dropping to 5.1°C (41.2°F). With 118mm (4.65") of snowfall over 5.7 days, Montreal starts preparing for the winter chill. Snow-capped buildings and frost-covered streets become a common sight indicating the onset of winter again. Weather in November »
Weather in December
Finally, December transforms Montreal into a winter wonderland with temperatures plunging to a chilling average high of -2.2°C (28°F). Snow makes a comeback in full swing with 211mm (8.31") falling over 14.5 days, turning the city into a snowy paradise. Weather in December »
Updated: Feb 4, 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 time of year in Montreal?
In Montreal, January is the month with the lowest recorded average temperatures, measuring a high of -5.8°C (21.6°F) and a low of -13.1°C (8.4°F).
What is the most humid month in Montreal?
The months with the highest humidity in Montreal, Canada, are January and February, with an average relative humidity of 90%.
How many days does it rain in Montreal?
In Montreal, during the entire year, the rain falls for 154.5 days and collects up to 864mm (34.02") of precipitation.
When does it snow in Montreal?
Months with snowfall are January through May, October through December.
When does it snow the most in Montreal?
January is the month with the most snowfall. Snow falls for 18.3 days and accumulates 293mm (11.54") of snow.
How much does it snow in Montreal?
Throughout the year, in Montreal, Canada, there are 74.1 snowfall days, and 1120mm (44.09") of snow is accumulated.
What is the month with the lowest UV index in Montreal?
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Montreal.
What is the month with the least sunshine in Montreal?
With an average of 2.7h of sunshine, February has the least sunshine of the year.
When is Daylight Saving Time (DST) in Montreal?
On Sunday, 10. March 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends on Sunday, 03. November 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the least humid month in Montreal?
The least humid month in Montreal, Canada, is May, with an average relative humidity of 73%.
What is the rainiest month in Montreal?
May is the month with the most rainfall. Rain falls for 17.8 days and accumulates 85mm (3.35") of precipitation.
When it does not snow in Montreal?
June through September are months without snowfall in Montreal.
When are the longest days in Montreal?
With an average of 15h and 36min of daylight, June has the longest days of the year in Montreal.
What are the warmest months in Montreal?
July, with its high-temperature average of 25.8°C (78.4°F) and a low-temperature average of 16.3°C (61.3°F), is the warmest month in Montreal.
What month has the most sunshine in Montreal?
The month with the most sunshine is July, with an average of 10h of sunshine.
What is the month with the highest UV index in Montreal?
With an average maximum UV index of 6, July is the month with the highest UV index in Montreal.
What is the driest month in Montreal?
September is the month with the least rainfall in Montreal, Canada. Rain falls for 12 days and accumulates 55mm (2.17") of precipitation.
What is the month with the shortest days in Montreal?
The month with the shortest days in Montreal is December, with an average of 8h and 48min of daylight.
Average temperature
Montreal, Canada
The warmest month (with the highest average high temperature) is July (25.8°C).
The month with the lowest average high temperature is January (-5.8°C).
The month with the highest average low temperature is July (16.3°C).
The coldest month (with the lowest average low temperature) is January (-13.1°C).
Average pressure
Montreal, Canada
- Average pressure in January:
1016.4mbar - Average pressure in February:
1016.1mbar - Average pressure in March:
1017.6mbar - Average pressure in April:
1014.3mbar - Average pressure in May:
1014.8mbar - Average pressure in June:
1012.4mbar
- Average pressure in July:
1013.1mbar - Average pressure in August:
1014.2mbar - Average pressure in September:
1017.1mbar - Average pressure in October:
1015.6mbar - Average pressure in November:
1017.8mbar - Average pressure in December:
1017.3mbar
The month with the highest atmospheric pressure is November (1017.8mbar).
The month with the lowest atmospheric pressure is June (1012.4mbar).
Average wind speed
Montreal, Canada
- Average wind speed in January:
13.8km/h - Average wind speed in February:
14.1km/h - Average wind speed in March:
13.6km/h - Average wind speed in April:
14.3km/h - Average wind speed in May:
12.9km/h - Average wind speed in June:
11.6km/h
- Average wind speed in July:
11km/h - Average wind speed in August:
10.9km/h - Average wind speed in September:
11.1km/h - Average wind speed in October:
12.9km/h - Average wind speed in November:
13.2km/h - Average wind speed in December:
13km/h
The windiest month (with the highest average wind speed) is April (14.3km/h).
The calmest month (with the lowest average wind speed) is August (10.9km/h).
Average humidity
Montreal, Canada
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is May (73%).
Average rainfall
Montreal, Canada
The wettest month (with the highest rainfall) is May (85mm).
The driest month (with the least rainfall) is September (55mm).
Average rainfall days
Montreal, Canada
- Average rainfall days in January:
5 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
10.3 days - Average rainfall days in April:
17 days - Average rainfall days in May:
17.8 days - Average rainfall days in June:
17.5 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
16.8 days - Average rainfall days in September:
12 days - Average rainfall days in October:
15.3 days - Average rainfall days in November:
11.2 days - Average rainfall days in December:
8.5 days
The months with the highest number of rainy days are May and July (17.8 days).
The month with the least rainy days is January (5 days).
Average snowfall
Montreal, Canada
The month with the highest snowfall is January (293mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days
Montreal, Canada
- Average snowfall days in January:
18.3 days - Average snowfall days in February:
17.5 days - Average snowfall days in March:
12.8 days - Average snowfall days in April:
4.5 days - Average snowfall days in May:
0.3 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:
0.5 days - Average snowfall days in November:
5.7 days - Average snowfall days in December:
14.5 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Montreal, Canada
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 4min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 2min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 3min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
3h and 0min - Average sunshine in February:
2h and 4min - Average sunshine in March:
4h and 3min - Average sunshine in April:
6h and 3min - Average sunshine in May:
8h and 1min - Average sunshine in June:
8h and 4min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 3min - Average sunshine in October:
5h and 1min - Average sunshine in November:
4h and 2min - Average sunshine in December:
3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 2h and 42min).
Average sunshine days
Montreal, Canada
- Average sunshine days in January:
10.5 days - Average sunshine days in February:
8.9 days - Average sunshine days in March:
10.7 days - Average sunshine days in April:
9.9 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
10.6 days
- Average sunshine days in July:
10.7 days - Average sunshine days in August:
12.2 days - Average sunshine days in September:
16.2 days - Average sunshine days in October:
14 days - Average sunshine days in November:
14.4 days - Average sunshine days in December:
11.1 days
The month with the most sunshine days is September (16.2 days).
The month with the least sunshine days is February (8.9 days).
Average UV index
Montreal, Canada
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover
Montreal, Canada
The month with the most cloud cover is February (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility
Montreal, Canada
The months with the highest visibility are April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January and February (7km).
Montreal, Canada
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