Sault Ste. Marie climate — normals and trends
Sault Ste. Marie (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 4.8 °C and it receives 877 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 (18.6 °C on average) and the coldest is January (-10.2 °C). Rainfall peaks in September.
Sault Ste. Marie averages 157 frost days, 0 hot days (≥ 30 °C) and 133 rainy days per year.
Sault Ste. Marie has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 164 to 150 per year over the period.
The hottest day of the period reached 32.3 °C (on 7 July 1988) and the coldest -35.6 °C (on 26 December 1993).
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
Sault Ste. MarieOntario
- coords
- 46.52°, -84.33°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.8°C
Average daily high
8.6°C
Average daily low
0.9°C
Annual rainfall
877mm
Sunshine / day
8.7h
Mean relative humidity
77%
Average peak wind
18.2km/h
Seasonal range
28.8°C
Frost days (< 0 °C)
157 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
133 d/yr
Annual snowfall
142.4 cm
Average feels-like high
6.0 °C
Average feels-like low
-2.5 °C
Average peak gust
39.2 km/h
Tropical nights (≥ 20 °C)
2 d/yr
Solar radiation
13.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.28 · 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
32.3 °C
7 July 1988
Coldest day
-35.6 °C
26 December 1993
Wettest day
80 mm
23 September 2010
Windiest day
51.7 km/h
6 April 1979
Strongest gust
113.4 km/h
10 November 1975
Hottest feels-like
38.4 °C
31 July 1975
Coldest feels-like
-41.1 °C
26 December 1993
Snowiest day
21.6 cm
6 March 1959
Sunniest day
15.1 h
3 July 2025
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -5.7 °C | +0.9 °C | 47 mm | -0 mm |
| Feb | -5.0 °C | +0.5 °C | 54 mm | +17 mm |
| Mar | 1.6 °C | +1.6 °C | 135 mm | +82 mm |
| Apr | 6.8 °C | -0.3 °C | 95 mm | +29 mm |
| May | 15.3 °C | +1.0 °C | 62 mm | -12 mm |
| Jun | 20.6 °C | +0.9 °C | 110 mm | +22 mm |
| Jul | 23.0 °C | +0.3 °C | 76 mm | -22 mm |
| Aug | 22.1 °C | +0.1 °C | 83 mm | -16 mm |
| Sep | 18.8 °C | +1.2 °C | 80 mm | -20 mm |
| Oct | 13.9 °C | +2.7 °C | 73 mm | -10 mm |
| Nov | 3.4 °C | -0.3 °C | 77 mm | +3 mm |
| Dec | -3.2 °C | -0.3 °C | 84 mm | +28 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 Sault Ste. Marie?
Sault Ste. Marie has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 4.8 °C and it receives 877 mm of precipitation per year.
What is the hottest day ever recorded in Sault Ste. Marie?
The hottest day measured in Sault Ste. Marie between 1940 and 2025 was 7 July 1988, reaching 32.3 °C.
What is the coldest day in Sault Ste. Marie?
The coldest day measured in Sault Ste. Marie between 1940 and 2025 was 26 December 1993, at -35.6 °C.
Does it snow in Sault Ste. Marie?
Yes. Sault Ste. Marie gets on average 142.4 cm of snow per year and has around 157 frost days.
Has the climate of Sault Ste. Marie warmed?
Yes: Sault Ste. Marie warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sault Ste. Marie?
The wettest day measured in Sault Ste. Marie between 1940 and 2025 was 23 September 2010, with 80 mm of rain in 24 hours.
What was the windiest day in Sault Ste. Marie?
The windiest day measured in Sault Ste. Marie between 1940 and 2025 was 6 April 1979, with winds reaching 51.7 km/h.
What is the warmest month in Sault Ste. Marie?
The warmest month in Sault Ste. Marie is July (18.6 °C on average); the coldest is January (-10.2 °C).
How much does it rain in Sault Ste. Marie?
Sault Ste. Marie receives on average 877 mm of precipitation per year, spread over about 133 rainy days.
Is it sunny in Sault Ste. Marie?
Sault Ste. Marie gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sault Ste. Marie?
The heaviest 24-hour snowfall measured in Sault Ste. Marie between 1940 and 2025 was 6 March 1959, with 21.6 cm.
Are there tropical nights in Sault Ste. Marie?
Yes: Sault Ste. Marie has on average 2 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sault Ste. Marie?
In Sault Ste. Marie, between 1940 and 2025, the highest apparent temperature reached 38.4 °C on 31 July 1975, and the lowest was -41.1 °C on 26 December 1993.
Compare Sault Ste. Marie with another city
Pick a second city: its normals will be set against these, indicator by indicator.