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Kankakee County, IL

: September 2026 so far averaged 70.6°F in Kankakee County, IL, the warmest 1 to 29 September in the county average since 2005, 2nd warmest of 76 (county average from NOAA gridded data, 1951 to 2026).

Last updated . This page normally updates every day; the latest update is late.

High
76.2°F
Warmest since 2025
24th warmest of 76
Low
47.4°F
Warmest since 2025
38th warmest of 76

No measurable precipitation in the county average of Kankakee County, IL for 8 days to Tuesday 29 September 2026 (county average from NOAA gridded data, 1951 to 2026).

Every 29 September high of the county average in Kankakee County, IL since 1951: 76.2°F in 2026; the highest is 92.9°F, in 1953.
2025: 85.7°F1953: 92.9°F2026: 76.2°F 2026 76.2°F 1953 92.9°F since 2025 1951 2026
  • Normal range, 61.5 to 80.9°F
Every year as a table

Every 29 September low of the county average in Kankakee County, IL since 1951: 47.4°F in 2026; the lowest is 32.8°F, in 1951.

YearHigh, °FLow, °F
202676.247.4
202585.756.2
202472.361.9
202372.953.7
202263.537.8
202179.954.3
202064.442.5
201971.161.4
201870.340.4
201772.648.8
201661.651.3
201579.162.1
201481.351.6
201384.651.2
201270.443.8
20116647.6
20107243.5
200963.947.8
200876.253.1
200776.747.9
200660.438.8
200577.143.4
200468.546.5
200359.437.7
200277.950.6
200157.443.5
200068.743.1
199975.352.2
199880.852.9
199772.850.9
199665.444.7
199581.750.2
199466.541.8
199362.138.7
199263.236.3
199167.843.5
199071.453.5
198974.442
198879.556.7
198779.557
198685.766.4
198577.146.9
198458.435.2
198380.651.2
198276.150.6
198165.942.2
198072.546.8
197982.552.9
19786741.7
197771.145.8
197665.945.1
19757246.5
197467.647
197377.863.9
197275.751.9
197185.465.8
197066.436.6
196970.742.9
196870.345.9
196752.937.9
196665.249.3
196576.751.7
196465.336.2
196375.146.5
196265.835.9
19616434.1
196072.245.7
195972.954.6
195867.940.9
195768.234.7
195680.749.7
195571.850.8
195479.362.9
195392.954.7
195282.352.8
195159.132.8

The month

August 2026 averaged 72.2°F in Kankakee County, IL, the warmest August in the county average since 2021, tied 60th warmest of 132 (with 1978 and 1934) (county average from NOAA's monthly county data, 1895 to 2026).

The month in words
  • Tuesday 29 September 2026: a high of 76.2°F averaged over Kankakee County, IL, the warmest 29 September in the county average since 2025, tied 24th warmest of 76 (with 2008) (county average from NOAA gridded data, 1951 to 2026).
  • Tuesday 29 September 2026: a low of 47.4°F averaged over Kankakee County, IL, the warmest 29 September night in the county average since 2025, 38th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
Days of the month without a value
0

Nearby

Chicago, IL 56.8 mi, the nearest city with its own station