Fitchburg climate — normals and trends
Fitchburg (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 8.4 °C and it receives 867 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 (22.4 °C on average) and the coldest is January (-7.3 °C). Rainfall peaks in June.
Fitchburg averages 135 frost days, 18 hot days (≥ 30 °C) and 114 rainy days per year.
Fitchburg has warmed by +2.0 °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 147 to 123 per year over the period.
The hottest day of the period reached 37.8 °C (on 5 July 2012) and the coldest -33.9 °C (on 3 February 1996).
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
FitchburgWisconsin
- coords
- 42.96°, -89.47°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.4°C
Average daily high
13.1°C
Average daily low
3.8°C
Annual rainfall
867mm
Sunshine / day
8.6h
Mean relative humidity
70%
Average peak wind
18.3km/h
Seasonal range
29.7°C
Frost days (< 0 °C)
135 d/yr
Hot days (≥ 30 °C)
18 d/yr
Rainy days (≥ 1 mm)
114 d/yr
Annual snowfall
87.2 cm
Average feels-like high
10.9 °C
Average feels-like low
0.7 °C
Average peak gust
38.1 km/h
Tropical nights (≥ 20 °C)
17 d/yr
Solar radiation
14.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °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
5 July 2012
Coldest day
-33.9 °C
3 February 1996
Wettest day
95 mm
13 September 1961
Windiest day
51.2 km/h
30 April 1984
Strongest gust
110.5 km/h
16 December 2021
Hottest feels-like
42.9 °C
13 July 1995
Coldest feels-like
-39.4 °C
10 January 1982
Snowiest day
24.0 cm
20 December 2012
Sunniest day
14.7 h
20 June 2003
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 | -2.6 °C | +0.6 °C | 3 mm | -37 mm |
| Feb | -1.1 °C | -0.5 °C | 25 mm | -10 mm |
| Mar | 11.2 °C | +5.3 °C | 99 mm | +33 mm |
| Apr | 14.3 °C | +0.8 °C | 75 mm | -19 mm |
| May | 19.5 °C | -0.4 °C | 89 mm | -10 mm |
| Jun | 26.7 °C | +1.5 °C | 127 mm | +27 mm |
| Jul | 28.0 °C | +0.7 °C | 137 mm | +47 mm |
| Aug | 25.6 °C | -0.6 °C | 124 mm | +34 mm |
| Sep | 24.2 °C | +2.2 °C | 43 mm | -42 mm |
| Oct | 17.6 °C | +2.2 °C | 35 mm | -33 mm |
| Nov | 7.9 °C | +1.4 °C | 44 mm | -13 mm |
| Dec | -1.2 °C | -0.6 °C | 43 mm | -3 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 Fitchburg?
Fitchburg has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 8.4 °C and it receives 867 mm of precipitation per year.
What is the hottest day ever recorded in Fitchburg?
The hottest day measured in Fitchburg between 1940 and 2025 was 5 July 2012, reaching 37.8 °C.
What is the coldest day in Fitchburg?
The coldest day measured in Fitchburg between 1940 and 2025 was 3 February 1996, at -33.9 °C.
Does it snow in Fitchburg?
Yes. Fitchburg gets on average 87.2 cm of snow per year and has around 135 frost days.
Has the climate of Fitchburg warmed?
Yes: Fitchburg warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Fitchburg?
The wettest day measured in Fitchburg between 1940 and 2025 was 13 September 1961, with 95 mm of rain in 24 hours.
What was the windiest day in Fitchburg?
The windiest day measured in Fitchburg between 1940 and 2025 was 30 April 1984, with winds reaching 51.2 km/h.
What is the warmest month in Fitchburg?
The warmest month in Fitchburg is July (22.4 °C on average); the coldest is January (-7.3 °C).
How much does it rain in Fitchburg?
Fitchburg receives on average 867 mm of precipitation per year, spread over about 114 rainy days.
Is it sunny in Fitchburg?
Fitchburg 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 Fitchburg?
The heaviest 24-hour snowfall measured in Fitchburg between 1940 and 2025 was 20 December 2012, with 24.0 cm.
Are there tropical nights in Fitchburg?
Yes: Fitchburg has on average 17 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Fitchburg?
In Fitchburg, between 1940 and 2025, the highest apparent temperature reached 42.9 °C on 13 July 1995, and the lowest was -39.4 °C on 10 January 1982.
Compare Fitchburg with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Fitchburg