Petawawa climate — normals and trends
Petawawa (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.0 °C and it receives 922 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 (19.7 °C on average) and the coldest is January (-11.3 °C). Rainfall peaks in June.
Petawawa averages 158 frost days, 3 hot days (≥ 30 °C) and 133 rainy days per year.
Petawawa has warmed by +1.3 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The hottest day of the period reached 34.8 °C (on 20 July 1977) and the coldest -35.7 °C (on 3 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
PetawawaOntario
- coords
- 45.89°, -77.28°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.0°C
Average daily high
9.4°C
Average daily low
0.8°C
Annual rainfall
922mm
Sunshine / day
8.1h
Mean relative humidity
75%
Average peak wind
15.6km/h
Seasonal range
31.0°C
Frost days (< 0 °C)
158 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
133 d/yr
Annual snowfall
151.5 cm
Average feels-like high
6.8 °C
Average feels-like low
-2.5 °C
Average peak gust
35.4 km/h
Tropical nights (≥ 20 °C)
4 d/yr
Solar radiation
13.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.21 · 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
34.8 °C
20 July 1977
Coldest day
-35.7 °C
3 January 1981
Wettest day
71 mm
8 September 2012
Windiest day
42.5 km/h
6 May 1950
Strongest gust
96.5 km/h
10 May 2002
Hottest feels-like
40.1 °C
1 August 1975
Coldest feels-like
-41.2 °C
3 January 1981
Snowiest day
28.1 cm
7 November 1951
Sunniest day
15.4 h
20 June 2022
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 | +0.1 °C | 46 mm | -12 mm |
| Feb | -6.3 °C | -1.2 °C | 66 mm | +14 mm |
| Mar | 2.6 °C | +1.8 °C | 116 mm | +50 mm |
| Apr | 8.8 °C | +0.4 °C | 86 mm | +9 mm |
| May | 16.6 °C | +0.3 °C | 80 mm | +1 mm |
| Jun | 22.8 °C | +1.2 °C | 111 mm | +21 mm |
| Jul | 26.3 °C | +2.0 °C | 81 mm | -6 mm |
| Aug | 24.9 °C | +1.9 °C | 58 mm | -29 mm |
| Sep | 20.2 °C | +1.8 °C | 35 mm | -54 mm |
| Oct | 14.6 °C | +3.1 °C | 72 mm | -13 mm |
| Nov | 2.3 °C | -1.5 °C | 74 mm | -8 mm |
| Dec | -4.7 °C | -1.0 °C | 72 mm | +2 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 Petawawa?
Petawawa has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.0 °C and it receives 922 mm of precipitation per year.
What is the hottest day ever recorded in Petawawa?
The hottest day measured in Petawawa between 1940 and 2025 was 20 July 1977, reaching 34.8 °C.
What is the coldest day in Petawawa?
The coldest day measured in Petawawa between 1940 and 2025 was 3 January 1981, at -35.7 °C.
Does it snow in Petawawa?
Yes. Petawawa gets on average 151.5 cm of snow per year and has around 158 frost days.
Has the climate of Petawawa warmed?
Yes: Petawawa warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Petawawa?
The wettest day measured in Petawawa between 1940 and 2025 was 8 September 2012, with 71 mm of rain in 24 hours.
What was the windiest day in Petawawa?
The windiest day measured in Petawawa between 1940 and 2025 was 6 May 1950, with winds reaching 42.5 km/h.
What is the warmest month in Petawawa?
The warmest month in Petawawa is July (19.7 °C on average); the coldest is January (-11.3 °C).
How much does it rain in Petawawa?
Petawawa receives on average 922 mm of precipitation per year, spread over about 133 rainy days.
Is it sunny in Petawawa?
Petawawa gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
What is the biggest single-day snowfall in Petawawa?
The heaviest 24-hour snowfall measured in Petawawa between 1940 and 2025 was 7 November 1951, with 28.1 cm.
Are there tropical nights in Petawawa?
Yes: Petawawa has on average 4 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Petawawa?
In Petawawa, between 1940 and 2025, the highest apparent temperature reached 40.1 °C on 1 August 1975, and the lowest was -41.2 °C on 3 January 1981.
Compare Petawawa with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Petawawa