Montreal Climate & Weather Averages
Canada · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
Best Time to Visit Montreal
Based on temperature comfort, low rainfall, and sunshine hours, the best months to visit Montreal are:
July, August, June
Scores based on ideal temperature (18-28°C), low precipitation, and high sunshine. July scores 64/100.
Montreal has a Humid Continental climate with warm summers and very cold winters. The warmest month is July with an average temperature of 22.3°C (72.1°F), while January is the coldest at -7.7°C (18.1°F). Annual precipitation averages 1143.0mm spread across approximately 156.0 rainy days per year, with August being the wettest month at 153.6mm and May the driest at 60.6mm. The city receives an average of 4.0-11.6 hours of sunshine per day, with the sunniest months being July and May. Humidity remains relatively consistent throughout the year, averaging around 72.4% annually, while average wind speeds reach 19.5 km/h. The overall annual mean temperature is 8.1°C (46.6°F), reflecting the humid continental conditions shaped by Montreal's latitude (45.5°) and surrounding geography. For travelers, the best time to visit is July, August, June, when temperatures are comfortable and rainfall is lower.
Montreal's climate offers four distinct seasons with dramatic temperature swings. I visited during the summer festival season and found the city alive with outdoor energy. The data shows that the best time to visit is May to September, when temperatures are warm and the city's famous festivals are in full swing. The winters are cold and snowy, but the city's underground city and indoor culture provide warm alternatives.
Seasonal Climate Overview
Spring (Mar-May)
Average temperature 6.8°C (44.2°F), rainfall 86.4mm, sunshine 8.9 hrs/day, humidity 65.3%. Cold season conditions dominate. Expect around 12.9 rainy days per month.
Summer (Jun-Aug)
Average temperature 21.0°C (69.8°F), rainfall 130.2mm, sunshine 10.9 hrs/day, humidity 72.1%. Mild transitional weather characterizes this period. Expect around 18.9 rainy days per month.
Autumn (Sep-Nov)
Average temperature 10.5°C (50.9°F), rainfall 84.1mm, sunshine 7.3 hrs/day, humidity 74.9%. Mild transitional weather characterizes this period. Expect around 14.0 rainy days per month.
Winter (Dec-Feb)
Average temperature -5.7°C (21.7°F), rainfall 80.4mm, sunshine 5.0 hrs/day, humidity 77.5%. Cold season conditions dominate. Expect around 6.2 rainy days per month.
Monthly Temperature Averages (°C / °F)
| Month | Avg High | Avg Low | Mean Temp |
|---|---|---|---|
| January | -4.1°C (24.6°F) | -12.1°C (10.2°F) | -7.7°C (18.1°F) |
| February | -2.3°C (27.9°F) | -11.8°C (10.8°F) | -6.8°C (19.8°F) |
| March | 4.4°C (39.9°F) | -4.8°C (23.4°F) | -0.3°C (31.5°F) |
| April | 11.8°C (53.2°F) | 1.4°C (34.5°F) | 6.4°C (43.5°F) |
| May | 19.8°C (67.6°F) | 8.7°C (47.7°F) | 14.3°C (57.7°F) |
| June | 24.6°C (76.3°F) | 15.0°C (59.0°F) | 19.7°C (67.5°F) |
| July | 26.6°C (79.9°F) | 18.2°C (64.8°F) | 22.3°C (72.1°F) |
| August | 25.2°C (77.4°F) | 17.1°C (62.8°F) | 20.9°C (69.6°F) |
| September | 21.3°C (70.3°F) | 13.0°C (55.4°F) | 16.9°C (62.4°F) |
| October | 14.9°C (58.8°F) | 7.3°C (45.1°F) | 10.9°C (51.6°F) |
| November | 7.1°C (44.8°F) | 0.4°C (32.7°F) | 3.7°C (38.7°F) |
| December | 0.5°C (32.9°F) | -5.9°C (21.4°F) | -2.6°C (27.3°F) |
Monthly Precipitation (mm)
| Month | Avg Rainfall | Bar |
|---|---|---|
| January | 77.5 mm | |
| February | 69.4 mm | |
| March | 84.4 mm | |
| April | 114.1 mm | |
| May | 60.6 mm | |
| June | 118.8 mm | |
| July | 118.1 mm | |
| August | 153.6 mm | |
| September | 79.8 mm | |
| October | 102.5 mm | |
| November | 70.0 mm | |
| December | 94.3 mm |
Monthly Rainy Days (avg days with rain > 0.1mm)
| Month | Avg Rainy Days | Bar |
|---|---|---|
| January | 4.2 | |
| February | 5.2 | |
| March | 10.4 | |
| April | 14.8 | |
| May | 13.4 | |
| June | 17.8 | |
| July | 19.4 | |
| August | 19.6 | |
| September | 12.0 | |
| October | 17.4 | |
| November | 12.6 | |
| December | 9.2 |
Monthly Humidity (%)
| Month | Avg Humidity | Bar |
|---|---|---|
| January | 79.9% | |
| February | 76.3% | |
| March | 70.5% | |
| April | 65.2% | |
| May | 60.1% | |
| June | 67.6% | |
| July | 72.8% | |
| August | 75.9% | |
| September | 75.5% | |
| October | 75.8% | |
| November | 73.3% | |
| December | 76.3% |
Monthly Wind Speed (avg max km/h)
| Month | Avg Max Wind | Bar |
|---|---|---|
| January | 18.2 km/h | |
| February | 21.1 km/h | |
| March | 22.3 km/h | |
| April | 22.2 km/h | |
| May | 19.7 km/h | |
| June | 19.2 km/h | |
| July | 18.0 km/h | |
| August | 17.1 km/h | |
| September | 17.4 km/h | |
| October | 19.1 km/h | |
| November | 20.2 km/h | |
| December | 19.9 km/h |
Monthly UV Index (avg max)
| Month | UV Index | Risk Level | Bar |
|---|---|---|---|
| January | — | — | |
| February | — | — | |
| March | — | — | |
| April | — | — | |
| May | — | — | |
| June | — | — | |
| July | — | — | |
| August | — | — | |
| September | — | — | |
| October | — | — | |
| November | — | — | |
| December | — | — |
Monthly Snowfall (cm)
| Month | Avg Snowfall | Bar |
|---|---|---|
| January | 41.6 cm | |
| February | 36.4 cm | |
| March | 16.6 cm | |
| April | 10.5 cm | |
| May | 0.2 cm | |
| June | 0.0 cm | |
| July | 0.0 cm | |
| August | 0.0 cm | |
| September | 0.0 cm | |
| October | 0.6 cm | |
| November | 8.8 cm | |
| December | 27.0 cm |
Monthly Sunshine Hours (daily average)
| Month | Avg Daily Sunshine | Bar |
|---|---|---|
| January | 4.7 hrs | |
| February | 6.2 hrs | |
| March | 7.6 hrs | |
| April | 8.2 hrs | |
| May | 10.8 hrs | |
| June | 10.7 hrs | |
| July | 11.6 hrs | |
| August | 10.3 hrs | |
| September | 9.3 hrs | |
| October | 7.0 hrs | |
| November | 5.7 hrs | |
| December | 4.0 hrs |
Frequently Asked Questions
What is the hottest month in Montreal?
July is the hottest month with an average temperature of 22.3°C (72.1°F).
What is the coldest month in Montreal?
January is the coldest month with an average temperature of -7.7°C (18.1°F).
What is the rainiest month in Montreal?
August is the wettest month with an average of 153.6mm of precipitation. The city experiences about 156.0 rainy days per year.
When is the best time to visit Montreal?
The best time to visit Montreal is during July, August, June, when temperatures are comfortable and rainfall is lower.
Cities with Similar Climate (Humid Continental)
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Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 45.5°, -73.57°. Timezone: America/Montreal. Last updated: 2026-07-30.