Climate Overview
The climate in Dolbeau-Mistassini is cool. The average annual temperature is 3°C and approximately 1147mm 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 -18°C. Dolbeau-Mistassini experiences heavy snowfall, typically from January through December.
Temperature
Dolbeau-Mistassini has a wide annual temperature range, spanning 43°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 -18°C and an average temperature of -13°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 1147mm of precipitation annually, which averages out to around 96mm per month. The wettest month is July, averaging 139mm of rainfall. August and October also tend to see above-average precipitation. The driest month is January, with just 58mm. That's 81mm less than July, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Dolbeau-Mistassini receives heavy snowfall, accumulating around 312cm annually from January through December. The snowiest month is March, with approximately 60cm. Winter travel should account for significant snow cover.
Wind
Dolbeau-Mistassini is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 0km/h between the calmest and windiest months.
Seasons
14 days until Autumn
It is currently summer in Dolbeau-Mistassini, which began on June 21, 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 -18°C. Autumn is next, beginning on September 23, 2026 (14 days from now).
Spring
Temperatures range from -11 to 17°C. Precipitation is moderate at around 253mm for the season, averaging 84mm per month. Winds are generally light, averaging 3km/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 379mm across the season with a monthly average of 126mm. Winds are generally light, averaging 3km/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 311mm across the season with a monthly average of 104mm. Expect around 56cm of snow accumulation during this period. Winds are generally light, averaging 3km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -18 to -6°C. Precipitation is moderate at around 204mm for the season, averaging 68mm per month. Expect around 166cm of snow accumulation during this period. Winds are generally light, averaging 3km/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.
