Stillwater climate — normals and trends
Stillwater (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 7.0 °C and it receives 836 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 (22.2 °C on average) and the coldest is January (-10.3 °C). Rainfall peaks in June.
Stillwater averages 149 frost days, 17 hot days (≥ 30 °C) and 109 rainy days per year.
Stillwater has warmed by +2.1 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 158 to 140 per year over the period.
The hottest day of the period reached 38.6 °C (on 15 July 1988) and the coldest -37.2 °C (on 30 January 1951).
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
StillwaterMinnesota
- coords
- 45.06°, -92.81°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.0°C
Average daily high
11.7°C
Average daily low
2.4°C
Annual rainfall
836mm
Sunshine / day
8.7h
Mean relative humidity
71%
Average peak wind
18.2km/h
Seasonal range
32.5°C
Frost days (< 0 °C)
149 d/yr
Hot days (≥ 30 °C)
17 d/yr
Rainy days (≥ 1 mm)
109 d/yr
Annual snowfall
95.3 cm
Average feels-like high
9.2 °C
Average feels-like low
-0.9 °C
Average peak gust
37.9 km/h
Tropical nights (≥ 20 °C)
14 d/yr
Solar radiation
14.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.2 °C per decade · r² = 0.33 · 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
38.6 °C
15 July 1988
Coldest day
-37.2 °C
30 January 1951
Wettest day
105 mm
1 August 2024
Windiest day
64.1 km/h
10 October 1949
Strongest gust
125.6 km/h
10 October 1949
Hottest feels-like
42.1 °C
30 July 1999
Coldest feels-like
-42.6 °C
30 January 1951
Snowiest day
25.3 cm
3 January 1973
Sunniest day
15.1 h
19 June 2025
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 | -5.2 °C | +0.8 °C | 9 mm | -18 mm |
| Feb | -4.4 °C | -1.3 °C | 20 mm | -7 mm |
| Mar | 8.9 °C | +5.2 °C | 73 mm | +17 mm |
| Apr | 13.3 °C | +0.8 °C | 112 mm | +29 mm |
| May | 20.6 °C | +1.1 °C | 81 mm | -22 mm |
| Jun | 24.7 °C | 0.0 °C | 202 mm | +90 mm |
| Jul | 27.9 °C | +0.7 °C | 92 mm | +2 mm |
| Aug | 25.4 °C | -0.5 °C | 76 mm | -25 mm |
| Sep | 23.4 °C | +2.4 °C | 72 mm | -17 mm |
| Oct | 16.1 °C | +2.0 °C | 30 mm | -32 mm |
| Nov | 6.9 °C | +2.7 °C | 41 mm | -10 mm |
| Dec | -3.9 °C | -0.6 °C | 44 mm | +10 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 Stillwater?
Stillwater has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 7.0 °C and it receives 836 mm of precipitation per year.
What is the hottest day ever recorded in Stillwater?
The hottest day measured in Stillwater between 1940 and 2025 was 15 July 1988, reaching 38.6 °C.
What is the coldest day in Stillwater?
The coldest day measured in Stillwater between 1940 and 2025 was 30 January 1951, at -37.2 °C.
Does it snow in Stillwater?
Yes. Stillwater gets on average 95.3 cm of snow per year and has around 149 frost days.
Has the climate of Stillwater warmed?
Yes: Stillwater warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Stillwater?
The wettest day measured in Stillwater between 1940 and 2025 was 1 August 2024, with 105 mm of rain in 24 hours.
What was the windiest day in Stillwater?
The windiest day measured in Stillwater between 1940 and 2025 was 10 October 1949, with winds reaching 64.1 km/h.
What is the warmest month in Stillwater?
The warmest month in Stillwater is July (22.2 °C on average); the coldest is January (-10.3 °C).
How much does it rain in Stillwater?
Stillwater receives on average 836 mm of precipitation per year, spread over about 109 rainy days.
Is it sunny in Stillwater?
Stillwater gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Stillwater?
The heaviest 24-hour snowfall measured in Stillwater between 1940 and 2025 was 3 January 1973, with 25.3 cm.
Are there tropical nights in Stillwater?
Yes: Stillwater has on average 14 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Stillwater?
In Stillwater, between 1940 and 2025, the highest apparent temperature reached 42.1 °C on 30 July 1999, and the lowest was -42.6 °C on 30 January 1951.
Compare Stillwater with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Stillwater