Bradley climate — normals and trends
Bradley (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.3 °C and it receives 956 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 (23.3 °C on average) and the coldest is January (-4.4 °C). Rainfall peaks in May.
Bradley averages 116 frost days, 29 hot days (≥ 30 °C) and 118 rainy days per year.
Bradley has warmed by +2.2 °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 130 to 102 per year over the period.
The hottest day of the period reached 39.4 °C (on 25 June 1988) and the coldest -31.3 °C (on 31 January 2019).
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
BradleyIllinois
- coords
- 41.14°, -87.86°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.3°C
Average daily high
15.1°C
Average daily low
5.6°C
Annual rainfall
956mm
Sunshine / day
8.9h
Mean relative humidity
71%
Average peak wind
20.6km/h
Seasonal range
27.7°C
Frost days (< 0 °C)
116 d/yr
Hot days (≥ 30 °C)
29 d/yr
Rainy days (≥ 1 mm)
118 d/yr
Annual snowfall
64.5 cm
Average feels-like high
13.1 °C
Average feels-like low
2.7 °C
Average peak gust
39.6 km/h
Tropical nights (≥ 20 °C)
29 d/yr
Solar radiation
15.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.41 · 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
25 June 1988
Coldest day
-31.3 °C
31 January 2019
Wettest day
71 mm
1 June 1947
Windiest day
55.1 km/h
11 November 1940
Strongest gust
109.1 km/h
10 November 1998
Hottest feels-like
45.6 °C
14 July 1995
Coldest feels-like
-38.0 °C
20 January 1985
Snowiest day
24.9 cm
2 January 1999
Sunniest day
14.5 h
14 June 2014
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 | -0.8 °C | -0.2 °C | 32 mm | -23 mm |
| Feb | 2.5 °C | +0.8 °C | 21 mm | -30 mm |
| Mar | 13.5 °C | +5.4 °C | 105 mm | +22 mm |
| Apr | 16.5 °C | +1.2 °C | 102 mm | 0 mm |
| May | 20.5 °C | -0.7 °C | 109 mm | +3 mm |
| Jun | 28.3 °C | +1.9 °C | 156 mm | +55 mm |
| Jul | 29.4 °C | +1.2 °C | 151 mm | +63 mm |
| Aug | 26.9 °C | -0.6 °C | 67 mm | -15 mm |
| Sep | 26.6 °C | +2.5 °C | 34 mm | -43 mm |
| Oct | 20.1 °C | +2.5 °C | 107 mm | +31 mm |
| Nov | 10.2 °C | +1.0 °C | 57 mm | -14 mm |
| Dec | 1.7 °C | -0.5 °C | 61 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 Bradley?
Bradley has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.3 °C and it receives 956 mm of precipitation per year.
What is the hottest day ever recorded in Bradley?
The hottest day measured in Bradley between 1940 and 2025 was 25 June 1988, reaching 39.4 °C.
What is the coldest day in Bradley?
The coldest day measured in Bradley between 1940 and 2025 was 31 January 2019, at -31.3 °C.
Does it snow in Bradley?
Yes. Bradley gets on average 64.5 cm of snow per year and has around 116 frost days.
Has the climate of Bradley warmed?
Yes: Bradley warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bradley?
The wettest day measured in Bradley between 1940 and 2025 was 1 June 1947, with 71 mm of rain in 24 hours.
What was the windiest day in Bradley?
The windiest day measured in Bradley between 1940 and 2025 was 11 November 1940, with winds reaching 55.1 km/h.
What is the warmest month in Bradley?
The warmest month in Bradley is July (23.3 °C on average); the coldest is January (-4.4 °C).
How much does it rain in Bradley?
Bradley receives on average 956 mm of precipitation per year, spread over about 118 rainy days.
Is it sunny in Bradley?
Bradley gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bradley?
The heaviest 24-hour snowfall measured in Bradley between 1940 and 2025 was 2 January 1999, with 24.9 cm.
Are there tropical nights in Bradley?
Yes: Bradley has on average 29 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bradley?
In Bradley, between 1940 and 2025, the highest apparent temperature reached 45.6 °C on 14 July 1995, and the lowest was -38.0 °C on 20 January 1985.
Compare Bradley with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bradley