Weather in Sept Iles

Planning a trip to Sept-Îles? Check out the latest information on weather conditions, including detailed forecasts and charts presented below.

The climate of the city of Sept-Îles can be described as subarctic with a distinct maritime influence, typical of Canada's eastern coast. The weather here features marked seasonality: travellers can expect rather severe, snowy winters and cool, refreshing summers. Overall, the climate is moderate, with no extreme heat, but with significant frost during the colder months.

The summer season, particularly July and August, is the most comfortable time to visit, with average temperatures hovering around +17°C and maximums rarely exceeding +22°C. These are ideal conditions for those who dislike the heat. Winters here are long and cold: from December to February, the thermometer often drops to -16°C and below, creating true northern landscapes.

A characteristic feature of the weather in Sept-Îles is stable humidity throughout the year. The number of days with precipitation remains high and consistent (from 11 to 14 days per month) regardless of the season, whether it be summer rain or winter snowfall. Therefore, when planning a trip, it is worth keeping waterproof clothing on hand and being prepared for frequent, though usually not too heavy, precipitation.

The climate in Sept-Îles is characterized by distinct seasonal contrasts typical of Canada's northern coastal regions. Winter here is long and frosty: the coldest month is traditionally January, with an average temperature of about -12.8°C. During this period, night frosts often reach -16.8°C, and sub-zero temperatures persist steadily from November to March, creating the conditions for a true snowy fairytale while requiring serious preparation and warm clothing from travellers.

The summer season brings mild and pleasant warmth, yet exhausting heat is practically non-existent. The warmest time of the year is July, when the air warms up to an average of 17.6°C, and daily highs reach a comfortable 21.7°C. Such weather is ideal for walks and exploring nature, as summer heat is replaced by freshness, and humidity remains moderate.

It is also worth considering the daily temperature fluctuations that persist throughout the year. The difference between day and night readings is usually about 7–9 degrees. Even in the height of summer, when it can be sunny and warm during the day (up to 20–21°C), nights remain quite cool with average values around 13.5°C, so having a windbreaker or a cozy sweater will be useful even in August.

Precipitation in Sept-Îles is distributed quite evenly throughout the year, so there is no pronounced dry season. In winter, when the average temperature drops to -12°C and below, the city is immersed in a real winter wonderland. Snowfall is a common occurrence from November to March, with the number of days with precipitation during this period holding steady at 11–13 days per month.

With the arrival of spring and rising temperatures, snow gradually gives way to rain. The summer period and early autumn are statistically the "wettest" times in terms of precipitation frequency. In July, August, and September, the highest number of rainy days is recorded — about 14 per month. This means precipitation can occur almost every other day, so an umbrella or raincoat will become important companions for the traveller during this season.

Transitional months, such as April and November, are often characterized by mixed precipitation due to temperatures hovering around zero: both rain and wet snow are possible during this time. Overall, the climate of Canada in this region demands readiness for weather whims at any time of the year, but the moderate volume of precipitation rarely interferes with enjoying the rugged beauty of the local nature.

Winter in Sept-Îles is harsh and snowy, so if your trip is planned for the period from November to March, be sure to take care of quality gear. You will need warm thermal underwear, woollen sweaters, and a reliable winter jacket or down coat that protects against piercing wind. Don't forget insulated waterproof boots with thick soles, as well as a hat, scarf, and mittens, as temperatures often drop below -16°C.

Summer here is mild and fresh, so do not expect exhausting heat: the average temperature in July and August stays around +17°C. For a summer trip, the principle of layering is ideal: pack T-shirts, but be sure to complement them with a fleece sweater and a light jacket or windbreaker in case of cool evenings. Given that precipitation falls quite often throughout the year (up to 14 rainy days per month in summer), a compact umbrella or a quality raincoat will be your faithful companions.

Regardless of the season, choose comfortable and sturdy footwear for walking around the city and its picturesque surroundings. In spring and autumn, the weather is changeable, so waterproof trekking boots will be very useful. It is also worth bringing sunglasses and sunscreen: they will come in handy on clear summer days as well as in winter to protect your eyes and skin from the bright sun reflecting off the snow.