Kankakee climate — normals and trends
Kankakee (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.6 °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 (23.5 °C on average) and the coldest is January (-4.1 °C). Rainfall peaks in May.
Kankakee averages 114 frost days, 31 hot days (≥ 30 °C) and 118 rainy days per year.
Kankakee has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The number of frost days there went from about 127 to 101 per year over the period.
The hottest day of the period reached 39.6 °C (on 25 June 1988) and the coldest -30.6 °C (on 16 January 2009).
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
KankakeeIllinois
- coords
- 41.12°, -87.86°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.6°C
Average daily high
15.5°C
Average daily low
5.8°C
Annual rainfall
956mm
Sunshine / day
8.8h
Mean relative humidity
70%
Average peak wind
20.9km/h
Seasonal range
27.6°C
Frost days (< 0 °C)
114 d/yr
Hot days (≥ 30 °C)
31 d/yr
Rainy days (≥ 1 mm)
118 d/yr
Annual snowfall
60.7 cm
Average feels-like high
13.4 °C
Average feels-like low
2.9 °C
Average peak gust
39.4 km/h
Tropical nights (≥ 20 °C)
30 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.42 · 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
39.6 °C
25 June 1988
Coldest day
-30.6 °C
16 January 2009
Wettest day
89 mm
5 August 2023
Windiest day
55.5 km/h
11 November 1940
Strongest gust
109.4 km/h
10 November 1998
Hottest feels-like
45.9 °C
14 July 1995
Coldest feels-like
-38.0 °C
20 January 1985
Snowiest day
26.5 cm
2 January 1999
Sunniest day
14.5 h
15 June 2020
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 | -0.7 °C | -0.5 °C | 33 mm | -23 mm |
| Feb | 2.9 °C | +0.7 °C | 22 mm | -31 mm |
| Mar | 14.0 °C | +5.3 °C | 95 mm | +11 mm |
| Apr | 17.1 °C | +1.1 °C | 103 mm | +1 mm |
| May | 21.6 °C | -0.2 °C | 103 mm | -3 mm |
| Jun | 28.8 °C | +2.0 °C | 130 mm | +30 mm |
| Jul | 30.0 °C | +1.6 °C | 147 mm | +60 mm |
| Aug | 27.3 °C | -0.4 °C | 53 mm | -26 mm |
| Sep | 27.5 °C | +3.0 °C | 26 mm | -49 mm |
| Oct | 20.7 °C | +2.7 °C | 95 mm | +20 mm |
| Nov | 10.6 °C | +1.0 °C | 56 mm | -16 mm |
| Dec | 2.1 °C | -0.5 °C | 52 mm | -12 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 Kankakee?
Kankakee has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.6 °C and it receives 956 mm of precipitation per year.
What is the hottest day ever recorded in Kankakee?
The hottest day measured in Kankakee between 1940 and 2025 was 25 June 1988, reaching 39.6 °C.
What is the coldest day in Kankakee?
The coldest day measured in Kankakee between 1940 and 2025 was 16 January 2009, at -30.6 °C.
Does it snow in Kankakee?
Yes. Kankakee gets on average 60.7 cm of snow per year and has around 114 frost days.
Has the climate of Kankakee warmed?
Yes: Kankakee warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kankakee?
The wettest day measured in Kankakee between 1940 and 2025 was 5 August 2023, with 89 mm of rain in 24 hours.
What was the windiest day in Kankakee?
The windiest day measured in Kankakee between 1940 and 2025 was 11 November 1940, with winds reaching 55.5 km/h.
What is the warmest month in Kankakee?
The warmest month in Kankakee is July (23.5 °C on average); the coldest is January (-4.1 °C).
How much does it rain in Kankakee?
Kankakee receives on average 956 mm of precipitation per year, spread over about 118 rainy days.
Is it sunny in Kankakee?
Kankakee gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Kankakee?
The heaviest 24-hour snowfall measured in Kankakee between 1940 and 2025 was 2 January 1999, with 26.5 cm.
Are there tropical nights in Kankakee?
Yes: Kankakee has on average 30 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kankakee?
In Kankakee, between 1940 and 2025, the highest apparent temperature reached 45.9 °C on 14 July 1995, and the lowest was -38.0 °C on 20 January 1985.
Compare Kankakee with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kankakee