Owasso climate — normals and trends
Owasso (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.7 °C and it receives 1,047 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 (27.9 °C on average) and the coldest is January (2.3 °C). Rainfall peaks in May.
Owasso averages 58 frost days, 87 hot days (≥ 30 °C) and 99 rainy days per year.
Owasso 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 64 to 52 per year over the period.
The hottest day of the period reached 44.0 °C (on 2 August 2011) and the coldest -25.1 °C (on 4 January 1947).
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
OwassoOklahoma
- coords
- 36.27°, -95.85°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.7°C
Average daily high
21.1°C
Average daily low
10.9°C
Annual rainfall
1,047mm
Sunshine / day
9.3h
Mean relative humidity
67%
Average peak wind
17.8km/h
Seasonal range
25.6°C
Frost days (< 0 °C)
58 d/yr
Hot days (≥ 30 °C)
87 d/yr
Rainy days (≥ 1 mm)
99 d/yr
Annual snowfall
20.0 cm
Average feels-like high
20.4 °C
Average feels-like low
9.2 °C
Average peak gust
37.3 km/h
Tropical nights (≥ 20 °C)
89 d/yr
Solar radiation
16.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.27 · 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 August 2011
Coldest day
-25.1 °C
4 January 1947
Wettest day
144 mm
24 May 2015
Windiest day
43.4 km/h
29 April 1984
Strongest gust
102.6 km/h
17 November 1958
Hottest feels-like
47.1 °C
3 August 2011
Coldest feels-like
-30.4 °C
4 January 1947
Snowiest day
28.6 cm
1 February 2011
Sunniest day
14.3 h
29 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 | 6.4 °C | -1.2 °C | 37 mm | -9 mm |
| Feb | 9.6 °C | -1.0 °C | 33 mm | -22 mm |
| Mar | 20.6 °C | +4.8 °C | 69 mm | -24 mm |
| Apr | 22.1 °C | +0.9 °C | 288 mm | +156 mm |
| May | 25.2 °C | -0.3 °C | 261 mm | +107 mm |
| Jun | 30.5 °C | +0.2 °C | 310 mm | +202 mm |
| Jul | 33.0 °C | -0.1 °C | 56 mm | -20 mm |
| Aug | 31.5 °C | -1.3 °C | 99 mm | +30 mm |
| Sep | 29.3 °C | +0.8 °C | 65 mm | -31 mm |
| Oct | 24.8 °C | +2.2 °C | 91 mm | -4 mm |
| Nov | 18.7 °C | +3.4 °C | 61 mm | -9 mm |
| Dec | 13.2 °C | +3.6 °C | 3 mm | -53 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 Owasso?
Owasso has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.7 °C and it receives 1,047 mm of precipitation per year.
What is the hottest day ever recorded in Owasso?
The hottest day measured in Owasso between 1940 and 2025 was 2 August 2011, reaching 44.0 °C.
What is the coldest day in Owasso?
The coldest day measured in Owasso between 1940 and 2025 was 4 January 1947, at -25.1 °C.
Does it snow in Owasso?
Yes. Owasso gets on average 20.0 cm of snow per year and has around 58 frost days.
Has the climate of Owasso warmed?
Yes: Owasso warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Owasso?
The wettest day measured in Owasso between 1940 and 2025 was 24 May 2015, with 144 mm of rain in 24 hours.
What was the windiest day in Owasso?
The windiest day measured in Owasso between 1940 and 2025 was 29 April 1984, with winds reaching 43.4 km/h.
What is the warmest month in Owasso?
The warmest month in Owasso is July (27.9 °C on average); the coldest is January (2.3 °C).
How much does it rain in Owasso?
Owasso receives on average 1,047 mm of precipitation per year, spread over about 99 rainy days.
Is it sunny in Owasso?
Owasso gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.
What is the biggest single-day snowfall in Owasso?
The heaviest 24-hour snowfall measured in Owasso between 1940 and 2025 was 1 February 2011, with 28.6 cm.
Are there tropical nights in Owasso?
Yes: Owasso has on average 89 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Owasso?
In Owasso, between 1940 and 2025, the highest apparent temperature reached 47.1 °C on 3 August 2011, and the lowest was -30.4 °C on 4 January 1947.
Compare Owasso with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Owasso