Cottage Grove climate — normals and trends
Cottage Grove (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 7.3 °C and it receives 846 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 (22.6 °C on average) and the coldest is January (-10.0 °C). Rainfall peaks in June.
Cottage Grove averages 147 frost days, 20 hot days (≥ 30 °C) and 107 rainy days per year.
Cottage Grove has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The number of frost days there went from about 156 to 138 per year over the period.
The hottest day of the period reached 39.4 °C (on 31 July 1988) and the coldest -37.0 °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
Cottage GroveMinnesota
- coords
- 44.83°, -92.94°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.3°C
Average daily high
12.1°C
Average daily low
2.6°C
Annual rainfall
846mm
Sunshine / day
8.7h
Mean relative humidity
71%
Average peak wind
18.6km/h
Seasonal range
32.6°C
Frost days (< 0 °C)
147 d/yr
Hot days (≥ 30 °C)
20 d/yr
Rainy days (≥ 1 mm)
107 d/yr
Annual snowfall
92.5 cm
Average feels-like high
9.7 °C
Average feels-like low
-0.6 °C
Average peak gust
37.6 km/h
Tropical nights (≥ 20 °C)
16 d/yr
Solar radiation
14.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °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
39.4 °C
31 July 1988
Coldest day
-37.0 °C
30 January 1951
Wettest day
92 mm
14 September 1941
Windiest day
61.8 km/h
10 October 1949
Strongest gust
117.7 km/h
10 October 1949
Hottest feels-like
43.4 °C
18 July 2011
Coldest feels-like
-42.3 °C
30 January 1951
Snowiest day
26.6 cm
3 January 1973
Sunniest day
15.0 h
23 June 2024
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 | -4.5 °C | +1.2 °C | 6 mm | -21 mm |
| Feb | -3.8 °C | -0.9 °C | 15 mm | -11 mm |
| Mar | 9.5 °C | +5.5 °C | 85 mm | +27 mm |
| Apr | 13.6 °C | +0.8 °C | 111 mm | +27 mm |
| May | 20.8 °C | +0.9 °C | 76 mm | -31 mm |
| Jun | 25.0 °C | -0.1 °C | 195 mm | +81 mm |
| Jul | 28.1 °C | +0.5 °C | 101 mm | +7 mm |
| Aug | 25.6 °C | -0.7 °C | 83 mm | -20 mm |
| Sep | 23.7 °C | +2.2 °C | 71 mm | -16 mm |
| Oct | 16.6 °C | +2.0 °C | 30 mm | -31 mm |
| Nov | 7.4 °C | +2.6 °C | 39 mm | -11 mm |
| Dec | -3.2 °C | -0.3 °C | 42 mm | +8 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 Cottage Grove?
Cottage Grove has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 7.3 °C and it receives 846 mm of precipitation per year.
What is the hottest day ever recorded in Cottage Grove?
The hottest day measured in Cottage Grove between 1940 and 2025 was 31 July 1988, reaching 39.4 °C.
What is the coldest day in Cottage Grove?
The coldest day measured in Cottage Grove between 1940 and 2025 was 30 January 1951, at -37.0 °C.
Does it snow in Cottage Grove?
Yes. Cottage Grove gets on average 92.5 cm of snow per year and has around 147 frost days.
Has the climate of Cottage Grove warmed?
Yes: Cottage Grove warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Cottage Grove?
The wettest day measured in Cottage Grove between 1940 and 2025 was 14 September 1941, with 92 mm of rain in 24 hours.
What was the windiest day in Cottage Grove?
The windiest day measured in Cottage Grove between 1940 and 2025 was 10 October 1949, with winds reaching 61.8 km/h.
What is the warmest month in Cottage Grove?
The warmest month in Cottage Grove is July (22.6 °C on average); the coldest is January (-10.0 °C).
How much does it rain in Cottage Grove?
Cottage Grove receives on average 846 mm of precipitation per year, spread over about 107 rainy days.
Is it sunny in Cottage Grove?
Cottage Grove 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 Cottage Grove?
The heaviest 24-hour snowfall measured in Cottage Grove between 1940 and 2025 was 3 January 1973, with 26.6 cm.
Are there tropical nights in Cottage Grove?
Yes: Cottage Grove has on average 16 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Cottage Grove?
In Cottage Grove, between 1940 and 2025, the highest apparent temperature reached 43.4 °C on 18 July 2011, and the lowest was -42.3 °C on 30 January 1951.
Compare Cottage Grove with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Cottage Grove