Belvidere climate — normals and trends
Belvidere (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 9.0 °C and it receives 876 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 (22.7 °C on average) and the coldest is January (-6.4 °C). Rainfall peaks in May.
Belvidere averages 129 frost days, 20 hot days (≥ 30 °C) and 114 rainy days per year.
Belvidere 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 141 to 117 per year over the period.
The hottest day of the period reached 38.7 °C (on 17 August 1988) and the coldest -34.6 °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
BelvidereIllinois
- coords
- 42.26°, -88.84°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.0°C
Average daily high
13.7°C
Average daily low
4.4°C
Annual rainfall
876mm
Sunshine / day
8.7h
Mean relative humidity
71%
Average peak wind
19.5km/h
Seasonal range
29.1°C
Frost days (< 0 °C)
129 d/yr
Hot days (≥ 30 °C)
20 d/yr
Rainy days (≥ 1 mm)
114 d/yr
Annual snowfall
77.0 cm
Average feels-like high
11.5 °C
Average feels-like low
1.3 °C
Average peak gust
39.0 km/h
Tropical nights (≥ 20 °C)
21 d/yr
Solar radiation
14.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.38 · 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
38.7 °C
17 August 1988
Coldest day
-34.6 °C
3 February 1996
Wettest day
109 mm
13 September 2008
Windiest day
52.2 km/h
11 November 1940
Strongest gust
111.6 km/h
30 April 1984
Hottest feels-like
42.7 °C
13 July 1995
Coldest feels-like
-40.5 °C
3 February 1996
Snowiest day
23.5 cm
15 December 1987
Sunniest day
14.6 h
13 June 2021
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 | -1.9 °C | +0.6 °C | 19 mm | -27 mm |
| Feb | -0.2 °C | -0.1 °C | 23 mm | -18 mm |
| Mar | 11.9 °C | +5.4 °C | 101 mm | +32 mm |
| Apr | 15.0 °C | +1.1 °C | 79 mm | -19 mm |
| May | 19.8 °C | -0.4 °C | 78 mm | -20 mm |
| Jun | 28.1 °C | +2.5 °C | 100 mm | +4 mm |
| Jul | 28.9 °C | +1.4 °C | 128 mm | +42 mm |
| Aug | 26.2 °C | -0.4 °C | 105 mm | +23 mm |
| Sep | 24.9 °C | +2.2 °C | 69 mm | -10 mm |
| Oct | 18.2 °C | +2.1 °C | 37 mm | -32 mm |
| Nov | 8.7 °C | +1.2 °C | 50 mm | -11 mm |
| Dec | -0.1 °C | -0.5 °C | 62 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 Belvidere?
Belvidere has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 9.0 °C and it receives 876 mm of precipitation per year.
What is the hottest day ever recorded in Belvidere?
The hottest day measured in Belvidere between 1940 and 2025 was 17 August 1988, reaching 38.7 °C.
What is the coldest day in Belvidere?
The coldest day measured in Belvidere between 1940 and 2025 was 3 February 1996, at -34.6 °C.
Does it snow in Belvidere?
Yes. Belvidere gets on average 77.0 cm of snow per year and has around 129 frost days.
Has the climate of Belvidere warmed?
Yes: Belvidere warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Belvidere?
The wettest day measured in Belvidere between 1940 and 2025 was 13 September 2008, with 109 mm of rain in 24 hours.
What was the windiest day in Belvidere?
The windiest day measured in Belvidere between 1940 and 2025 was 11 November 1940, with winds reaching 52.2 km/h.
What is the warmest month in Belvidere?
The warmest month in Belvidere is July (22.7 °C on average); the coldest is January (-6.4 °C).
How much does it rain in Belvidere?
Belvidere receives on average 876 mm of precipitation per year, spread over about 114 rainy days.
Is it sunny in Belvidere?
Belvidere 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 Belvidere?
The heaviest 24-hour snowfall measured in Belvidere between 1940 and 2025 was 15 December 1987, with 23.5 cm.
Are there tropical nights in Belvidere?
Yes: Belvidere has on average 21 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Belvidere?
In Belvidere, between 1940 and 2025, the highest apparent temperature reached 42.7 °C on 13 July 1995, and the lowest was -40.5 °C on 3 February 1996.
Compare Belvidere with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Belvidere