Norman climate — normals and trends
Norman (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.0 °C and it receives 805 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 (28.1 °C on average) and the coldest is January (2.9 °C). Rainfall peaks in May.
Norman averages 57 frost days, 94 hot days (≥ 30 °C) and 86 rainy days per year.
Norman has warmed by +1.6 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 62 to 52 per year over the period.
The hottest day of the period reached 43.7 °C (on 19 July 2022) and the coldest -24.7 °C (on 16 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
NormanOklahoma
- coords
- 35.22°, -97.44°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.0°C
Average daily high
21.6°C
Average daily low
10.9°C
Annual rainfall
805mm
Sunshine / day
9.7h
Mean relative humidity
64%
Average peak wind
19.8km/h
Seasonal range
25.2°C
Frost days (< 0 °C)
57 d/yr
Hot days (≥ 30 °C)
94 d/yr
Rainy days (≥ 1 mm)
86 d/yr
Annual snowfall
17.1 cm
Average feels-like high
20.5 °C
Average feels-like low
8.8 °C
Average peak gust
40.2 km/h
Tropical nights (≥ 20 °C)
89 d/yr
Solar radiation
17.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.31 · 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
43.7 °C
19 July 2022
Coldest day
-24.7 °C
16 February 2021
Wettest day
131 mm
29 April 2017
Windiest day
50.3 km/h
27 May 1973
Strongest gust
98.3 km/h
26 February 2023
Hottest feels-like
45.9 °C
19 July 2018
Coldest feels-like
-30.0 °C
16 February 2021
Snowiest day
22.6 cm
1 February 2011
Sunniest day
14.2 h
19 June 1957
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 | 7.7 °C | -0.9 °C | 20 mm | -16 mm |
| Feb | 10.8 °C | -0.6 °C | 18 mm | -28 mm |
| Mar | 21.3 °C | +5.0 °C | 50 mm | -23 mm |
| Apr | 22.3 °C | +0.7 °C | 346 mm | +244 mm |
| May | 25.7 °C | -0.1 °C | 158 mm | +39 mm |
| Jun | 30.9 °C | +0.2 °C | 153 mm | +66 mm |
| Jul | 33.0 °C | -0.5 °C | 48 mm | -5 mm |
| Aug | 31.6 °C | -1.8 °C | 91 mm | +41 mm |
| Sep | 29.6 °C | +0.7 °C | 25 mm | -48 mm |
| Oct | 25.7 °C | +2.8 °C | 66 mm | -7 mm |
| Nov | 19.4 °C | +3.7 °C | 24 mm | -26 mm |
| Dec | 14.1 °C | +3.8 °C | 4 mm | -39 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 Norman?
Norman has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.0 °C and it receives 805 mm of precipitation per year.
What is the hottest day ever recorded in Norman?
The hottest day measured in Norman between 1940 and 2025 was 19 July 2022, reaching 43.7 °C.
What is the coldest day in Norman?
The coldest day measured in Norman between 1940 and 2025 was 16 February 2021, at -24.7 °C.
Does it snow in Norman?
Yes. Norman gets on average 17.1 cm of snow per year and has around 57 frost days.
Has the climate of Norman warmed?
Yes: Norman warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Norman?
The wettest day measured in Norman between 1940 and 2025 was 29 April 2017, with 131 mm of rain in 24 hours.
What was the windiest day in Norman?
The windiest day measured in Norman between 1940 and 2025 was 27 May 1973, with winds reaching 50.3 km/h.
What is the warmest month in Norman?
The warmest month in Norman is July (28.1 °C on average); the coldest is January (2.9 °C).
How much does it rain in Norman?
Norman receives on average 805 mm of precipitation per year, spread over about 86 rainy days.
Is it sunny in Norman?
Norman gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.
What is the biggest single-day snowfall in Norman?
The heaviest 24-hour snowfall measured in Norman between 1940 and 2025 was 1 February 2011, with 22.6 cm.
Are there tropical nights in Norman?
Yes: Norman has on average 89 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Norman?
In Norman, between 1940 and 2025, the highest apparent temperature reached 45.9 °C on 19 July 2018, and the lowest was -30.0 °C on 16 February 2021.
Compare Norman with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Norman