Stouffville climate — normals and trends
Stouffville (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.2 °C and it receives 888 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 (20.7 °C on average) and the coldest is January (-7.0 °C). Rainfall peaks in June.
Stouffville averages 144 frost days, 9 hot days (≥ 30 °C) and 129 rainy days per year.
Stouffville has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 151 to 137 per year over the period.
The hottest day of the period reached 36.9 °C (on 8 July 1988) and the coldest -33.9 °C (on 25 December 1980).
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
StouffvilleOntario
- coords
- 43.97°, -79.25°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.2°C
Average daily high
11.9°C
Average daily low
2.5°C
Annual rainfall
888mm
Sunshine / day
8.7h
Mean relative humidity
72%
Average peak wind
18.4km/h
Seasonal range
27.7°C
Frost days (< 0 °C)
144 d/yr
Hot days (≥ 30 °C)
9 d/yr
Rainy days (≥ 1 mm)
129 d/yr
Annual snowfall
112.1 cm
Average feels-like high
9.4 °C
Average feels-like low
-0.8 °C
Average peak gust
40.1 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
14.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.27 · 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
36.9 °C
8 July 1988
Coldest day
-33.9 °C
25 December 1980
Wettest day
98 mm
15 October 1954
Windiest day
49.1 km/h
6 April 1979
Strongest gust
109.8 km/h
6 April 1985
Hottest feels-like
40.2 °C
21 July 2011
Coldest feels-like
-38.4 °C
25 December 1980
Snowiest day
24.2 cm
3 April 1975
Sunniest day
15.0 h
20 June 1940
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 | -3.5 °C | -0.6 °C | 36 mm | -21 mm |
| Feb | -2.8 °C | -1.0 °C | 75 mm | +22 mm |
| Mar | 6.2 °C | +2.6 °C | 82 mm | +17 mm |
| Apr | 11.2 °C | -0.1 °C | 67 mm | -10 mm |
| May | 17.4 °C | -0.7 °C | 89 mm | +5 mm |
| Jun | 24.7 °C | +1.4 °C | 73 mm | -14 mm |
| Jul | 27.7 °C | +1.8 °C | 53 mm | -33 mm |
| Aug | 25.1 °C | +0.3 °C | 65 mm | -18 mm |
| Sep | 22.5 °C | +2.0 °C | 51 mm | -28 mm |
| Oct | 15.3 °C | +1.6 °C | 72 mm | -5 mm |
| Nov | 5.5 °C | -0.9 °C | 58 mm | -15 mm |
| Dec | -1.0 °C | -0.9 °C | 91 mm | +25 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 Stouffville?
Stouffville has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.2 °C and it receives 888 mm of precipitation per year.
What is the hottest day ever recorded in Stouffville?
The hottest day measured in Stouffville between 1940 and 2025 was 8 July 1988, reaching 36.9 °C.
What is the coldest day in Stouffville?
The coldest day measured in Stouffville between 1940 and 2025 was 25 December 1980, at -33.9 °C.
Does it snow in Stouffville?
Yes. Stouffville gets on average 112.1 cm of snow per year and has around 144 frost days.
Has the climate of Stouffville warmed?
Yes: Stouffville warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Stouffville?
The wettest day measured in Stouffville between 1940 and 2025 was 15 October 1954, with 98 mm of rain in 24 hours.
What was the windiest day in Stouffville?
The windiest day measured in Stouffville between 1940 and 2025 was 6 April 1979, with winds reaching 49.1 km/h.
What is the warmest month in Stouffville?
The warmest month in Stouffville is July (20.7 °C on average); the coldest is January (-7.0 °C).
How much does it rain in Stouffville?
Stouffville receives on average 888 mm of precipitation per year, spread over about 129 rainy days.
Is it sunny in Stouffville?
Stouffville 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 Stouffville?
The heaviest 24-hour snowfall measured in Stouffville between 1940 and 2025 was 3 April 1975, with 24.2 cm.
Are there tropical nights in Stouffville?
Yes: Stouffville has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Stouffville?
In Stouffville, between 1940 and 2025, the highest apparent temperature reached 40.2 °C on 21 July 2011, and the lowest was -38.4 °C on 25 December 1980.
Compare Stouffville with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Stouffville