Climate Overview
The climate in Thetford-Mines is cool. The average annual temperature is 5°C and approximately 1421mm of precipitation falls per year. Thetford-Mines receives a notable amount of rainfall throughout the year, including during its driest month. Thetford-Mines is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are February, January, December, when temperatures can drop to -14°C. Thetford-Mines experiences heavy snowfall, typically from January through December.
Temperature
Thetford-Mines has a wide annual temperature range, spanning 38°C from the coldest to warmest months. August is the warmest month, though highs remain moderate at 24°C with a mean of 19°C. The coldest month is February, when overnight lows fall to -14°C and the daily average is -8°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 10°C shift in average temperatures.
Precipitation
Thetford-Mines is a fairly wet location, receiving approximately 1421mm of precipitation annually, which averages out to around 118mm per month. The wettest month is October, averaging 187mm of rainfall. August and July also tend to see above-average precipitation. The driest month is January, with just 55mm. That's 132mm less than October, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Thetford-Mines receives heavy snowfall, accumulating around 306cm annually from January through December. The snowiest month is December, with approximately 91cm. Winter travel should account for significant snow cover.
Wind
Thetford-Mines 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 February, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, 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 1km/h between the calmest and windiest months.
Seasons
52 days until Autumn
It is currently summer in Thetford-Mines, which began on June 21, 2026. Thetford-Mines 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 August at around 24°C, while the coldest stretch bottoms out in February near -14°C. Autumn is next, beginning on September 23, 2026 — 52 days from now.
Spring
Temperatures range from -8 to 18°C. Precipitation is moderate at around 295mm for the season, averaging 98mm 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 24°C. Rainfall is heavy, totalling around 483mm across the season with a monthly average of 161mm. Winds are generally light, averaging 3km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 0 to 20°C. Rainfall is heavy, totalling around 344mm across the season with a monthly average of 115mm. Expect around 40cm 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 -14 to -2°C. Precipitation is moderate at around 299mm for the season, averaging 100mm per month. Expect around 195cm of snow accumulation during this period. Winds are generally light, averaging 4km/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 Thetford-Mines 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.
