Climate Insights for Montréal

The climate in Montréal is cool. The average annual temperature is 8°C and approximately 1132mm of precipitation falls per year. Montréal receives a notable amount of rainfall throughout the year, including during its driest month. Montréal is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to -11°C. Snowfall occurs from January to December, with around 144cm accumulating over the season.

Montréal has a wide annual temperature range, spanning 38°C from the coldest to warmest months. The warmest month is July, when average highs reach 27°C and the mean temperature sits around 22°C. The coldest month is January, when overnight lows fall to -11°C and the daily average is -8°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between April and May, with a 8°C shift in average temperatures.

Montréal is a moderately rainy area, receiving approximately 1132mm of precipitation annually, which averages out to around 94mm per month. The wettest month is October, averaging 117mm of rainfall. April and June also tend to see above-average precipitation. The driest month is September, with just 68mm. That's 49mm less than October, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 144cm accumulating over the season. January typically sees the most snow at around 39cm.

Montréal is mildly breezy, with an average annual wind speed of 19km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 20km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in August, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 20km/h in winter, 19km/h in spring, 17km/h in summer, 18km/h in autumn.

It is currently spring in Montréal, which began on March 20, 2026. Montréal is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 27°C, while the coldest stretch bottoms out in January near -11°C. Summer is next, beginning on June 21, 2026 — 90 days from now.

The best time to visit Montréal is during July and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 83mm per month. By contrast, January can be quite cold with temperatures dropping to -11°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Montréal based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.