Norfolk County climate — normals and trends
Norfolk County (Canada) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 8.8 °C and it receives 1,040 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 (22.1 °C on average) and the coldest is January (-4.5 °C). Rainfall peaks in July.
Norfolk County averages 114 frost days, 2 hot days (≥ 30 °C) and 136 rainy days per year.
Norfolk County 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 128 to 100 per year over the period.
The hottest day of the period reached 34.2 °C (on 8 July 1988) and the coldest -28.5 °C (on 16 February 2015).
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
Norfolk CountyOntario
- coords
- 42.83°, -80.38°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.8°C
Average daily high
12.0°C
Average daily low
5.6°C
Annual rainfall
1,040mm
Sunshine / day
9.0h
Mean relative humidity
74%
Average peak wind
24.1km/h
Seasonal range
26.6°C
Frost days (< 0 °C)
114 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
136 d/yr
Annual snowfall
95.3 cm
Average feels-like high
9.4 °C
Average feels-like low
2.0 °C
Average peak gust
41.6 km/h
Tropical nights (≥ 20 °C)
26 d/yr
Solar radiation
14.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.26 · 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
34.2 °C
8 July 1988
Coldest day
-28.5 °C
16 February 2015
Wettest day
73 mm
15 October 1954
Windiest day
68.6 km/h
26 January 1978
Strongest gust
114.8 km/h
26 January 1978
Hottest feels-like
39.0 °C
17 June 1994
Coldest feels-like
-34.1 °C
17 January 1982
Snowiest day
26.8 cm
5 December 1977
Sunniest day
15.0 h
16 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 | -2.2 °C | -0.6 °C | 44 mm | -28 mm |
| Feb | -1.4 °C | -0.2 °C | 73 mm | +10 mm |
| Mar | 6.6 °C | +3.4 °C | 94 mm | +10 mm |
| Apr | 10.0 °C | +0.4 °C | 77 mm | -18 mm |
| May | 15.4 °C | -1.6 °C | 116 mm | +24 mm |
| Jun | 22.9 °C | -0.1 °C | 49 mm | -55 mm |
| Jul | 26.6 °C | +1.1 °C | 69 mm | -35 mm |
| Aug | 24.3 °C | -0.2 °C | 42 mm | -53 mm |
| Sep | 22.4 °C | +1.8 °C | 34 mm | -53 mm |
| Oct | 15.7 °C | +1.7 °C | 81 mm | +1 mm |
| Nov | 7.3 °C | -0.1 °C | 72 mm | -15 mm |
| Dec | 1.1 °C | -0.5 °C | 108 mm | +28 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 Norfolk County?
Norfolk County has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 8.8 °C and it receives 1,040 mm of precipitation per year.
What is the hottest day ever recorded in Norfolk County?
The hottest day measured in Norfolk County between 1940 and 2025 was 8 July 1988, reaching 34.2 °C.
What is the coldest day in Norfolk County?
The coldest day measured in Norfolk County between 1940 and 2025 was 16 February 2015, at -28.5 °C.
Does it snow in Norfolk County?
Yes. Norfolk County gets on average 95.3 cm of snow per year and has around 114 frost days.
Has the climate of Norfolk County warmed?
Yes: Norfolk County warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Norfolk County?
The wettest day measured in Norfolk County between 1940 and 2025 was 15 October 1954, with 73 mm of rain in 24 hours.
What was the windiest day in Norfolk County?
The windiest day measured in Norfolk County between 1940 and 2025 was 26 January 1978, with winds reaching 68.6 km/h.
What is the warmest month in Norfolk County?
The warmest month in Norfolk County is July (22.1 °C on average); the coldest is January (-4.5 °C).
How much does it rain in Norfolk County?
Norfolk County receives on average 1,040 mm of precipitation per year, spread over about 136 rainy days.
Is it sunny in Norfolk County?
Norfolk County gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.
What is the biggest single-day snowfall in Norfolk County?
The heaviest 24-hour snowfall measured in Norfolk County between 1940 and 2025 was 5 December 1977, with 26.8 cm.
Are there tropical nights in Norfolk County?
Yes: Norfolk County has on average 26 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Norfolk County?
In Norfolk County, between 1940 and 2025, the highest apparent temperature reached 39.0 °C on 17 June 1994, and the lowest was -34.1 °C on 17 January 1982.
Compare Norfolk County with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Norfolk County