Saint-Constant climate — normals and trends
Saint-Constant (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.9 °C and it receives 1,107 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 (21.3 °C on average) and the coldest is January (-9.0 °C). Rainfall peaks in July.
Saint-Constant averages 144 frost days, 10 hot days (≥ 30 °C) and 142 rainy days per year.
Saint-Constant 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 154 to 134 per year over the period.
The hottest day of the period reached 37.1 °C (on 27 May 2020) and the coldest -35.5 °C (on 15 January 1957).
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
Saint-ConstantQuebec
- coords
- 45.37°, -73.57°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.9°C
Average daily high
11.4°C
Average daily low
2.3°C
Annual rainfall
1,107mm
Sunshine / day
8.4h
Mean relative humidity
73%
Average peak wind
18.0km/h
Seasonal range
30.3°C
Frost days (< 0 °C)
144 d/yr
Hot days (≥ 30 °C)
10 d/yr
Rainy days (≥ 1 mm)
142 d/yr
Annual snowfall
145.6 cm
Average feels-like high
9.0 °C
Average feels-like low
-1.0 °C
Average peak gust
37.2 km/h
Tropical nights (≥ 20 °C)
9 d/yr
Solar radiation
13.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.36 · 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
37.1 °C
27 May 2020
Coldest day
-35.5 °C
15 January 1957
Wettest day
105 mm
28 August 2011
Windiest day
52.9 km/h
25 February 1956
Strongest gust
111.2 km/h
27 January 1996
Hottest feels-like
40.8 °C
1 August 1975
Coldest feels-like
-41.1 °C
15 January 1957
Snowiest day
32.7 cm
30 November 1944
Sunniest day
15.4 h
25 June 2018
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 | -4.9 °C | 0.0 °C | 46 mm | -21 mm |
| Feb | -4.1 °C | -0.8 °C | 80 mm | +16 mm |
| Mar | 5.5 °C | +2.8 °C | 90 mm | +15 mm |
| Apr | 12.2 °C | +1.3 °C | 104 mm | +8 mm |
| May | 18.5 °C | -0.2 °C | 123 mm | +23 mm |
| Jun | 25.2 °C | +1.5 °C | 86 mm | -23 mm |
| Jul | 27.6 °C | +1.5 °C | 80 mm | -30 mm |
| Aug | 26.3 °C | +1.5 °C | 64 mm | -46 mm |
| Sep | 22.5 °C | +2.2 °C | 60 mm | -41 mm |
| Oct | 15.8 °C | +2.5 °C | 155 mm | +54 mm |
| Nov | 4.0 °C | -1.8 °C | 113 mm | +20 mm |
| Dec | -2.7 °C | -1.0 °C | 80 mm | -3 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 Saint-Constant?
Saint-Constant has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.9 °C and it receives 1,107 mm of precipitation per year.
What is the hottest day ever recorded in Saint-Constant?
The hottest day measured in Saint-Constant between 1940 and 2025 was 27 May 2020, reaching 37.1 °C.
What is the coldest day in Saint-Constant?
The coldest day measured in Saint-Constant between 1940 and 2025 was 15 January 1957, at -35.5 °C.
Does it snow in Saint-Constant?
Yes. Saint-Constant gets on average 145.6 cm of snow per year and has around 144 frost days.
Has the climate of Saint-Constant warmed?
Yes: Saint-Constant warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Saint-Constant?
The wettest day measured in Saint-Constant between 1940 and 2025 was 28 August 2011, with 105 mm of rain in 24 hours.
What was the windiest day in Saint-Constant?
The windiest day measured in Saint-Constant between 1940 and 2025 was 25 February 1956, with winds reaching 52.9 km/h.
What is the warmest month in Saint-Constant?
The warmest month in Saint-Constant is July (21.3 °C on average); the coldest is January (-9.0 °C).
How much does it rain in Saint-Constant?
Saint-Constant receives on average 1,107 mm of precipitation per year, spread over about 142 rainy days.
Is it sunny in Saint-Constant?
Saint-Constant gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Saint-Constant?
The heaviest 24-hour snowfall measured in Saint-Constant between 1940 and 2025 was 30 November 1944, with 32.7 cm.
Are there tropical nights in Saint-Constant?
Yes: Saint-Constant has on average 9 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Saint-Constant?
In Saint-Constant, between 1940 and 2025, the highest apparent temperature reached 40.8 °C on 1 August 1975, and the lowest was -41.1 °C on 15 January 1957.
Compare Saint-Constant with another city
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Nearby cities
The climate around Saint-Constant