Peterborough climate — normals and trends
Peterborough (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.1 °C and it receives 914 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 (20.8 °C on average) and the coldest is January (-7.6 °C). Rainfall peaks in June.
Peterborough averages 142 frost days, 8 hot days (≥ 30 °C) and 129 rainy days per year.
Peterborough has warmed by +1.4 °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 148 to 136 per year over the period.
The hottest day of the period reached 36.6 °C (on 8 July 1988) and the coldest -33.7 °C (on 23 January 1976).
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
PeterboroughOntario
- coords
- 44.30°, -78.32°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.1°C
Average daily high
11.7°C
Average daily low
2.6°C
Annual rainfall
914mm
Sunshine / day
8.8h
Mean relative humidity
73%
Average peak wind
17.8km/h
Seasonal range
28.4°C
Frost days (< 0 °C)
142 d/yr
Hot days (≥ 30 °C)
8 d/yr
Rainy days (≥ 1 mm)
129 d/yr
Annual snowfall
121.9 cm
Average feels-like high
9.2 °C
Average feels-like low
-0.7 °C
Average peak gust
39.3 km/h
Tropical nights (≥ 20 °C)
7 d/yr
Solar radiation
14.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.25 · 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
36.6 °C
8 July 1988
Coldest day
-33.7 °C
23 January 1976
Wettest day
80 mm
9 September 2004
Windiest day
46.4 km/h
4 April 1963
Strongest gust
106.2 km/h
6 April 1985
Hottest feels-like
40.2 °C
1 August 1975
Coldest feels-like
-40.1 °C
4 January 1981
Snowiest day
27.0 cm
11 December 1992
Sunniest day
15.0 h
16 June 2021
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 | -3.7 °C | -0.2 °C | 44 mm | -18 mm |
| Feb | -3.3 °C | -1.1 °C | 77 mm | +20 mm |
| Mar | 5.6 °C | +2.4 °C | 101 mm | +33 mm |
| Apr | 11.1 °C | 0.0 °C | 70 mm | -11 mm |
| May | 17.6 °C | -0.5 °C | 122 mm | +38 mm |
| Jun | 24.5 °C | +1.3 °C | 42 mm | -44 mm |
| Jul | 28.1 °C | +2.2 °C | 43 mm | -42 mm |
| Aug | 25.5 °C | +0.7 °C | 60 mm | -22 mm |
| Sep | 22.6 °C | +2.2 °C | 36 mm | -46 mm |
| Oct | 15.3 °C | +1.8 °C | 74 mm | -4 mm |
| Nov | 4.9 °C | -1.2 °C | 66 mm | -10 mm |
| Dec | -1.3 °C | -0.8 °C | 104 mm | +32 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 Peterborough?
Peterborough has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.1 °C and it receives 914 mm of precipitation per year.
What is the hottest day ever recorded in Peterborough?
The hottest day measured in Peterborough between 1940 and 2025 was 8 July 1988, reaching 36.6 °C.
What is the coldest day in Peterborough?
The coldest day measured in Peterborough between 1940 and 2025 was 23 January 1976, at -33.7 °C.
Does it snow in Peterborough?
Yes. Peterborough gets on average 121.9 cm of snow per year and has around 142 frost days.
Has the climate of Peterborough warmed?
Yes: Peterborough warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Peterborough?
The wettest day measured in Peterborough between 1940 and 2025 was 9 September 2004, with 80 mm of rain in 24 hours.
What was the windiest day in Peterborough?
The windiest day measured in Peterborough between 1940 and 2025 was 4 April 1963, with winds reaching 46.4 km/h.
What is the warmest month in Peterborough?
The warmest month in Peterborough is July (20.8 °C on average); the coldest is January (-7.6 °C).
How much does it rain in Peterborough?
Peterborough receives on average 914 mm of precipitation per year, spread over about 129 rainy days.
Is it sunny in Peterborough?
Peterborough gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Peterborough?
The heaviest 24-hour snowfall measured in Peterborough between 1940 and 2025 was 11 December 1992, with 27.0 cm.
Are there tropical nights in Peterborough?
Yes: Peterborough has on average 7 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Peterborough?
In Peterborough, between 1940 and 2025, the highest apparent temperature reached 40.2 °C on 1 August 1975, and the lowest was -40.1 °C on 4 January 1981.
Compare Peterborough with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Peterborough