Winona climate — normals and trends
Winona (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 7.5 °C and it receives 886 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 (22.1 °C on average) and the coldest is January (-9.1 °C). Rainfall peaks in June.
Winona averages 144 frost days, 15 hot days (≥ 30 °C) and 111 rainy days per year.
Winona has warmed by +1.9 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 152 to 136 per year over the period.
The hottest day of the period reached 38.1 °C (on 16 August 1988) and the coldest -37.4 °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
WinonaMinnesota
- coords
- 44.05°, -91.64°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.5°C
Average daily high
12.2°C
Average daily low
2.9°C
Annual rainfall
886mm
Sunshine / day
8.6h
Mean relative humidity
71%
Average peak wind
18.1km/h
Seasonal range
31.2°C
Frost days (< 0 °C)
144 d/yr
Hot days (≥ 30 °C)
15 d/yr
Rainy days (≥ 1 mm)
111 d/yr
Annual snowfall
94.9 cm
Average feels-like high
9.9 °C
Average feels-like low
-0.3 °C
Average peak gust
38.5 km/h
Tropical nights (≥ 20 °C)
15 d/yr
Solar radiation
14.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °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
38.1 °C
16 August 1988
Coldest day
-37.4 °C
30 January 1951
Wettest day
95 mm
29 August 1952
Windiest day
54.7 km/h
10 October 1949
Strongest gust
121.0 km/h
13 April 1964
Hottest feels-like
42.6 °C
5 July 2012
Coldest feels-like
-42.6 °C
30 January 1951
Snowiest day
27.9 cm
18 November 1957
Sunniest day
15.0 h
20 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -3.8 °C | +1.0 °C | 3 mm | -27 mm |
| Feb | -2.5 °C | -0.6 °C | 18 mm | -12 mm |
| Mar | 10.4 °C | +5.8 °C | 106 mm | +42 mm |
| Apr | 13.8 °C | +0.9 °C | 116 mm | +24 mm |
| May | 20.1 °C | +0.6 °C | 83 mm | -26 mm |
| Jun | 25.6 °C | +0.9 °C | 127 mm | +10 mm |
| Jul | 27.6 °C | +0.6 °C | 113 mm | +14 mm |
| Aug | 25.1 °C | -0.7 °C | 132 mm | +32 mm |
| Sep | 23.6 °C | +2.3 °C | 66 mm | -23 mm |
| Oct | 16.5 °C | +1.9 °C | 38 mm | -27 mm |
| Nov | 7.3 °C | +2.0 °C | 62 mm | +9 mm |
| Dec | -2.7 °C | -0.5 °C | 42 mm | +4 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 Winona?
Winona has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 7.5 °C and it receives 886 mm of precipitation per year.
What is the hottest day ever recorded in Winona?
The hottest day measured in Winona between 1940 and 2025 was 16 August 1988, reaching 38.1 °C.
What is the coldest day in Winona?
The coldest day measured in Winona between 1940 and 2025 was 30 January 1951, at -37.4 °C.
Does it snow in Winona?
Yes. Winona gets on average 94.9 cm of snow per year and has around 144 frost days.
Has the climate of Winona warmed?
Yes: Winona warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Winona?
The wettest day measured in Winona between 1940 and 2025 was 29 August 1952, with 95 mm of rain in 24 hours.
What was the windiest day in Winona?
The windiest day measured in Winona between 1940 and 2025 was 10 October 1949, with winds reaching 54.7 km/h.
What is the warmest month in Winona?
The warmest month in Winona is July (22.1 °C on average); the coldest is January (-9.1 °C).
How much does it rain in Winona?
Winona receives on average 886 mm of precipitation per year, spread over about 111 rainy days.
Is it sunny in Winona?
Winona gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.
What is the biggest single-day snowfall in Winona?
The heaviest 24-hour snowfall measured in Winona between 1940 and 2025 was 18 November 1957, with 27.9 cm.
Are there tropical nights in Winona?
Yes: Winona has on average 15 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Winona?
In Winona, between 1940 and 2025, the highest apparent temperature reached 42.6 °C on 5 July 2012, and the lowest was -42.6 °C on 30 January 1951.
Compare Winona with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Winona