Climate Insights for Sept-Îles

The climate in Sept-Îles is cool. The average annual temperature is 3°C and approximately 1120mm of precipitation falls per year. Sept-Îles receives a notable amount of rainfall throughout the year, including during its driest month. Sept-Îles 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 -17°C. Sept-Îles experiences heavy snowfall, typically from January through December.

Sept-Îles has a wide annual temperature range, spanning 39°C from the coldest to warmest months. July is the warmest month, though highs remain moderate at 22°C with a mean of 17°C. February brings the harshest conditions, with lows dropping to -17°C and an average temperature of -12°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 8°C shift in average temperatures.

Sept-Îles is a moderately rainy area, receiving approximately 1120mm of precipitation annually, which averages out to around 93mm per month. The wettest month is October, averaging 119mm of rainfall. December and August also tend to see above-average precipitation. The driest month is February, with just 64mm. That's 55mm 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. Sept-Îles receives heavy snowfall, accumulating around 411cm annually from January through December. The snowiest month is March, with approximately 75cm. Winter travel should account for significant snow cover.

Sept-Îles is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently summer in Sept-Îles, which began on June 21, 2026. Sept-Îles 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 22°C, while the coldest stretch bottoms out in February near -17°C. Autumn is next, beginning on September 23, 2026 (14 days from now).

The best time to visit Sept-Îles is during July, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 99mm per month. By contrast, February can be quite cold with temperatures dropping to -17°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 Sept-Îles 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.