Climate Overview
The climate in Dolbeau-Mistassini is cool. The average annual temperature is 3°C and approximately 1107mm of precipitation falls per year. Dolbeau-Mistassini receives a notable amount of rainfall throughout the year, including during its driest month. Dolbeau-Mistassini 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 February, January, December, when temperatures can drop to -19°C. Dolbeau-Mistassini experiences heavy snowfall, typically from January through December.
Temperature
Dolbeau-Mistassini has a wide annual temperature range, spanning 44°C from the coldest to warmest months. July is the warmest month, though highs remain moderate at 25°C with a mean of 19°C. February brings the harshest conditions, with lows dropping to -19°C and an average temperature of -14°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 9°C shift in average temperatures.
Precipitation
Dolbeau-Mistassini is a moderately rainy area, receiving approximately 1107mm of precipitation annually, which averages out to around 92mm per month. The wettest month is July, averaging 142mm of rainfall. August and October also tend to see above-average precipitation. The driest month is January, with just 55mm. That's 87mm less than July, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Dolbeau-Mistassini receives heavy snowfall, accumulating around 213cm annually from January through December. The snowiest month is March, with approximately 40cm. Winter travel should account for significant snow cover.
Wind
Dolbeau-Mistassini is mildly breezy, with an average annual wind speed of 16km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 18km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 14km/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.
Seasons
89 days until Summer
It is currently spring in Dolbeau-Mistassini, which began on March 20, 2026. Dolbeau-Mistassini 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 25°C, while the coldest stretch bottoms out in February near -19°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from -12 to 17°C. Precipitation is moderate at around 235mm for the season, averaging 78mm per month. Winds are moderate at around 17km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 11 to 25°C. Rainfall is heavy, totalling around 374mm across the season with a monthly average of 125mm. Winds are moderate at around 15km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -5 to 19°C. Rainfall is heavy, totalling around 306mm across the season with a monthly average of 102mm. Expect around 36cm of snow accumulation during this period. Winds are moderate at around 16km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -19 to -5°C. Precipitation is moderate at around 192mm for the season, averaging 64mm per month. Expect around 115cm of snow accumulation during this period. Winds are moderate at around 16km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.
Monthly Climate Data
The table below shows monthly climate averages for Dolbeau-Mistassini 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.
