Norfolk climate — normals and trends
Norfolk (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 9.3 °C and it receives 742 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 (24.1 °C on average) and the coldest is January (-6.4 °C). Rainfall peaks in May.
Norfolk averages 140 frost days, 43 hot days (≥ 30 °C) and 92 rainy days per year.
Norfolk has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 145 to 135 per year over the period.
The hottest day of the period reached 44.0 °C (on 2 July 1990) and the coldest -33.9 °C (on 15 February 2021).
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
NorfolkNebraska
- coords
- 42.03°, -97.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.3°C
Average daily high
15.1°C
Average daily low
3.9°C
Annual rainfall
742mm
Sunshine / day
9.5h
Mean relative humidity
68%
Average peak wind
23.5km/h
Seasonal range
30.5°C
Frost days (< 0 °C)
140 d/yr
Hot days (≥ 30 °C)
43 d/yr
Rainy days (≥ 1 mm)
92 d/yr
Annual snowfall
74.4 cm
Average feels-like high
12.4 °C
Average feels-like low
0.5 °C
Average peak gust
42.6 km/h
Tropical nights (≥ 20 °C)
24 d/yr
Solar radiation
15.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °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
44.0 °C
2 July 1990
Coldest day
-33.9 °C
15 February 2021
Wettest day
86 mm
13 July 1994
Windiest day
71.5 km/h
22 December 1968
Strongest gust
117.0 km/h
10 October 1949
Hottest feels-like
49.5 °C
11 July 1954
Coldest feels-like
-41.3 °C
24 December 1983
Snowiest day
34.4 cm
27 November 1983
Sunniest day
15.0 h
8 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 | 0.4 °C | +1.5 °C | 6 mm | -16 mm |
| Feb | 0.2 °C | -1.3 °C | 17 mm | -9 mm |
| Mar | 13.9 °C | +6.4 °C | 54 mm | -2 mm |
| Apr | 16.8 °C | +1.5 °C | 58 mm | -24 mm |
| May | 22.1 °C | +0.7 °C | 120 mm | +7 mm |
| Jun | 28.1 °C | +1.0 °C | 154 mm | +47 mm |
| Jul | 28.8 °C | -0.9 °C | 128 mm | +54 mm |
| Aug | 26.9 °C | -1.7 °C | 130 mm | +53 mm |
| Sep | 25.5 °C | +1.3 °C | 53 mm | -16 mm |
| Oct | 19.4 °C | +2.0 °C | 26 mm | -28 mm |
| Nov | 10.0 °C | +1.9 °C | 23 mm | -13 mm |
| Dec | 5.4 °C | +4.4 °C | 10 mm | -17 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?
Norfolk has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 9.3 °C and it receives 742 mm of precipitation per year.
What is the hottest day ever recorded in Norfolk?
The hottest day measured in Norfolk between 1940 and 2025 was 2 July 1990, reaching 44.0 °C.
What is the coldest day in Norfolk?
The coldest day measured in Norfolk between 1940 and 2025 was 15 February 2021, at -33.9 °C.
Does it snow in Norfolk?
Yes. Norfolk gets on average 74.4 cm of snow per year and has around 140 frost days.
Has the climate of Norfolk warmed?
Yes: Norfolk warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Norfolk?
The wettest day measured in Norfolk between 1940 and 2025 was 13 July 1994, with 86 mm of rain in 24 hours.
What was the windiest day in Norfolk?
The windiest day measured in Norfolk between 1940 and 2025 was 22 December 1968, with winds reaching 71.5 km/h.
What is the warmest month in Norfolk?
The warmest month in Norfolk is July (24.1 °C on average); the coldest is January (-6.4 °C).
How much does it rain in Norfolk?
Norfolk receives on average 742 mm of precipitation per year, spread over about 92 rainy days.
Is it sunny in Norfolk?
Norfolk gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
What is the biggest single-day snowfall in Norfolk?
The heaviest 24-hour snowfall measured in Norfolk between 1940 and 2025 was 27 November 1983, with 34.4 cm.
Are there tropical nights in Norfolk?
Yes: Norfolk has on average 24 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Norfolk?
In Norfolk, between 1940 and 2025, the highest apparent temperature reached 49.5 °C on 11 July 1954, and the lowest was -41.3 °C on 24 December 1983.
Compare Norfolk with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Norfolk