Sept-Îles climate — normals and trends
Sept-Îles (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 1.4 °C and it receives 1,048 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (16.1 °C on average) and the coldest is January (-14.8 °C). Rainfall peaks in October.
Sept-Îles averages 192 frost days, 1 hot days (≥ 30 °C) and 139 rainy days per year.
Sept-Îles has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 204 to 180 per year over the period.
The hottest day of the period reached 33.0 °C (on 18 June 2020) and the coldest -36.8 °C (on 21 January 1975).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Sept-ÎlesQuebec
- coords
- 50.20°, -66.38°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
1.4°C
Average daily high
5.4°C
Average daily low
-2.7°C
Annual rainfall
1,048mm
Sunshine / day
8.2h
Mean relative humidity
72%
Average peak wind
18.6km/h
Seasonal range
30.9°C
Frost days (< 0 °C)
192 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
139 d/yr
Annual snowfall
287.5 cm
Average feels-like high
2.0 °C
Average feels-like low
-6.9 °C
Average peak gust
40.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
12.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.42 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
33.0 °C
18 June 2020
Coldest day
-36.8 °C
21 January 1975
Wettest day
87 mm
23 August 1971
Windiest day
61.8 km/h
24 December 2022
Strongest gust
150.5 km/h
24 December 2022
Hottest feels-like
33.6 °C
21 August 1976
Coldest feels-like
-43.3 °C
18 January 1982
Snowiest day
37.7 cm
12 March 1952
Sunniest day
15.9 h
23 June 1950
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -6.9 °C | +3.8 °C | 72 mm | -2 mm |
| Feb | -7.5 °C | +1.0 °C | 63 mm | +1 mm |
| Mar | -2.1 °C | +0.4 °C | 106 mm | +28 mm |
| Apr | 4.2 °C | +0.4 °C | 106 mm | +23 mm |
| May | 13.5 °C | +3.3 °C | 78 mm | -5 mm |
| Jun | 19.9 °C | +3.0 °C | 76 mm | -11 mm |
| Jul | 22.6 °C | +2.2 °C | 131 mm | +34 mm |
| Aug | 21.7 °C | +2.0 °C | 57 mm | -37 mm |
| Sep | 17.3 °C | +2.7 °C | 45 mm | -54 mm |
| Oct | 11.2 °C | +3.5 °C | 65 mm | -36 mm |
| Nov | 2.5 °C | +2.1 °C | 99 mm | +1 mm |
| Dec | -7.9 °C | -0.6 °C | 102 mm | +10 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Sept-Îles?
Sept-Îles has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 1.4 °C and it receives 1,048 mm of precipitation per year.
What is the hottest day ever recorded in Sept-Îles?
The hottest day measured in Sept-Îles between 1940 and 2025 was 18 June 2020, reaching 33.0 °C.
What is the coldest day in Sept-Îles?
The coldest day measured in Sept-Îles between 1940 and 2025 was 21 January 1975, at -36.8 °C.
Does it snow in Sept-Îles?
Yes. Sept-Îles gets on average 287.5 cm of snow per year and has around 192 frost days.
Has the climate of Sept-Îles warmed?
Yes: Sept-Îles warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sept-Îles?
The wettest day measured in Sept-Îles between 1940 and 2025 was 23 August 1971, with 87 mm of rain in 24 hours.
What was the windiest day in Sept-Îles?
The windiest day measured in Sept-Îles between 1940 and 2025 was 24 December 2022, with winds reaching 61.8 km/h.
What is the warmest month in Sept-Îles?
The warmest month in Sept-Îles is July (16.1 °C on average); the coldest is January (-14.8 °C).
How much does it rain in Sept-Îles?
Sept-Îles receives on average 1,048 mm of precipitation per year, spread over about 139 rainy days.
Is it sunny in Sept-Îles?
Sept-Îles gets on average 8.2 hours of sunshine per day, roughly 2,993 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sept-Îles?
The heaviest 24-hour snowfall measured in Sept-Îles between 1940 and 2025 was 12 March 1952, with 37.7 cm.
Are there tropical nights in Sept-Îles?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Sept-Îles.
What was the most extreme apparent temperature in Sept-Îles?
In Sept-Îles, between 1940 and 2025, the highest apparent temperature reached 33.6 °C on 21 August 1976, and the lowest was -43.3 °C on 18 January 1982.
Compare Sept-Îles with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sept-Îles