Brockville climate — normals and trends
Brockville (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.5 °C and it receives 1,055 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 (21.0 °C on average) and the coldest is January (-7.3 °C). Rainfall peaks in July.
Brockville averages 130 frost days, 9 hot days (≥ 30 °C) and 143 rainy days per year.
Brockville has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The number of frost days there went from about 138 to 122 per year over the period.
The hottest day of the period reached 36.1 °C (on 10 July 2020) and the coldest -36.3 °C (on 4 January 1981).
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
BrockvilleOntario
- coords
- 44.59°, -75.69°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.5°C
Average daily high
12.0°C
Average daily low
3.2°C
Annual rainfall
1,055mm
Sunshine / day
8.2h
Mean relative humidity
75%
Average peak wind
16.5km/h
Seasonal range
28.3°C
Frost days (< 0 °C)
130 d/yr
Hot days (≥ 30 °C)
9 d/yr
Rainy days (≥ 1 mm)
143 d/yr
Annual snowfall
134.1 cm
Average feels-like high
9.8 °C
Average feels-like low
0.2 °C
Average peak gust
36.9 km/h
Tropical nights (≥ 20 °C)
8 d/yr
Solar radiation
13.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.28 · 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
36.1 °C
10 July 2020
Coldest day
-36.3 °C
4 January 1981
Wettest day
118 mm
9 September 2004
Windiest day
46.4 km/h
25 February 1965
Strongest gust
110.2 km/h
13 November 1992
Hottest feels-like
40.6 °C
1 August 1975
Coldest feels-like
-41.6 °C
4 January 1981
Snowiest day
30.9 cm
3 April 1975
Sunniest day
15.2 h
22 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 | -3.0 °C | +0.3 °C | 50 mm | -21 mm |
| Feb | -2.9 °C | -0.9 °C | 88 mm | +21 mm |
| Mar | 6.4 °C | +3.0 °C | 102 mm | +24 mm |
| Apr | 12.1 °C | +0.9 °C | 91 mm | -4 mm |
| May | 17.4 °C | -1.1 °C | 111 mm | +19 mm |
| Jun | 24.5 °C | +1.2 °C | 76 mm | -16 mm |
| Jul | 27.5 °C | +1.6 °C | 79 mm | -19 mm |
| Aug | 26.0 °C | +1.1 °C | 48 mm | -46 mm |
| Sep | 23.1 °C | +2.4 °C | 44 mm | -51 mm |
| Oct | 16.2 °C | +2.2 °C | 120 mm | +24 mm |
| Nov | 5.1 °C | -1.8 °C | 94 mm | +2 mm |
| Dec | -1.0 °C | -1.2 °C | 97 mm | +11 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 Brockville?
Brockville has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.5 °C and it receives 1,055 mm of precipitation per year.
What is the hottest day ever recorded in Brockville?
The hottest day measured in Brockville between 1940 and 2025 was 10 July 2020, reaching 36.1 °C.
What is the coldest day in Brockville?
The coldest day measured in Brockville between 1940 and 2025 was 4 January 1981, at -36.3 °C.
Does it snow in Brockville?
Yes. Brockville gets on average 134.1 cm of snow per year and has around 130 frost days.
Has the climate of Brockville warmed?
Yes: Brockville warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Brockville?
The wettest day measured in Brockville between 1940 and 2025 was 9 September 2004, with 118 mm of rain in 24 hours.
What was the windiest day in Brockville?
The windiest day measured in Brockville between 1940 and 2025 was 25 February 1965, with winds reaching 46.4 km/h.
What is the warmest month in Brockville?
The warmest month in Brockville is July (21.0 °C on average); the coldest is January (-7.3 °C).
How much does it rain in Brockville?
Brockville receives on average 1,055 mm of precipitation per year, spread over about 143 rainy days.
Is it sunny in Brockville?
Brockville 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 Brockville?
The heaviest 24-hour snowfall measured in Brockville between 1940 and 2025 was 3 April 1975, with 30.9 cm.
Are there tropical nights in Brockville?
Yes: Brockville has on average 8 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Brockville?
In Brockville, between 1940 and 2025, the highest apparent temperature reached 40.6 °C on 1 August 1975, and the lowest was -41.6 °C on 4 January 1981.
Compare Brockville with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Brockville