Fond du Lac climate — normals and trends
Fond du Lac (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.6 °C and it receives 807 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 (21.7 °C on average) and the coldest is January (-8.0 °C). Rainfall peaks in June.
Fond du Lac averages 138 frost days, 11 hot days (≥ 30 °C) and 113 rainy days per year.
Fond du Lac 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 150 to 126 per year over the period.
The hottest day of the period reached 37.8 °C (on 14 July 1995) and the coldest -33.7 °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
Fond du LacWisconsin
- coords
- 43.77°, -88.44°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.6°C
Average daily high
11.9°C
Average daily low
3.4°C
Annual rainfall
807mm
Sunshine / day
8.6h
Mean relative humidity
72%
Average peak wind
20.8km/h
Seasonal range
29.7°C
Frost days (< 0 °C)
138 d/yr
Hot days (≥ 30 °C)
11 d/yr
Rainy days (≥ 1 mm)
113 d/yr
Annual snowfall
96.9 cm
Average feels-like high
9.3 °C
Average feels-like low
0.0 °C
Average peak gust
39.7 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
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.37 · 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
37.8 °C
14 July 1995
Coldest day
-33.7 °C
30 January 1951
Wettest day
88 mm
22 June 1990
Windiest day
58.3 km/h
11 November 1940
Strongest gust
112.3 km/h
16 December 2021
Hottest feels-like
41.5 °C
13 July 1995
Coldest feels-like
-39.8 °C
10 January 1982
Snowiest day
25.3 cm
1 December 1985
Sunniest day
15.0 h
22 June 2023
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 | -3.3 °C | +1.1 °C | 4 mm | -36 mm |
| Feb | -2.2 °C | +0.1 °C | 27 mm | -8 mm |
| Mar | 8.7 °C | +4.8 °C | 88 mm | +26 mm |
| Apr | 12.5 °C | +0.8 °C | 105 mm | +20 mm |
| May | 17.7 °C | -0.8 °C | 68 mm | -19 mm |
| Jun | 25.0 °C | +1.0 °C | 82 mm | -11 mm |
| Jul | 27.2 °C | +0.9 °C | 109 mm | +26 mm |
| Aug | 24.9 °C | -0.4 °C | 95 mm | +10 mm |
| Sep | 23.1 °C | +2.1 °C | 44 mm | -31 mm |
| Oct | 16.9 °C | +2.5 °C | 44 mm | -21 mm |
| Nov | 7.1 °C | +1.3 °C | 40 mm | -16 mm |
| Dec | -2.7 °C | -1.2 °C | 46 mm | +1 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 Fond du Lac?
Fond du Lac has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.6 °C and it receives 807 mm of precipitation per year.
What is the hottest day ever recorded in Fond du Lac?
The hottest day measured in Fond du Lac between 1940 and 2025 was 14 July 1995, reaching 37.8 °C.
What is the coldest day in Fond du Lac?
The coldest day measured in Fond du Lac between 1940 and 2025 was 30 January 1951, at -33.7 °C.
Does it snow in Fond du Lac?
Yes. Fond du Lac gets on average 96.9 cm of snow per year and has around 138 frost days.
Has the climate of Fond du Lac warmed?
Yes: Fond du Lac warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Fond du Lac?
The wettest day measured in Fond du Lac between 1940 and 2025 was 22 June 1990, with 88 mm of rain in 24 hours.
What was the windiest day in Fond du Lac?
The windiest day measured in Fond du Lac between 1940 and 2025 was 11 November 1940, with winds reaching 58.3 km/h.
What is the warmest month in Fond du Lac?
The warmest month in Fond du Lac is July (21.7 °C on average); the coldest is January (-8.0 °C).
How much does it rain in Fond du Lac?
Fond du Lac receives on average 807 mm of precipitation per year, spread over about 113 rainy days.
Is it sunny in Fond du Lac?
Fond du Lac 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 Fond du Lac?
The heaviest 24-hour snowfall measured in Fond du Lac between 1940 and 2025 was 1 December 1985, with 25.3 cm.
Are there tropical nights in Fond du Lac?
Yes: Fond du Lac has on average 15 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Fond du Lac?
In Fond du Lac, between 1940 and 2025, the highest apparent temperature reached 41.5 °C on 13 July 1995, and the lowest was -39.8 °C on 10 January 1982.
Compare Fond du Lac with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Fond du Lac