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Coles County, IL

: September 2026 so far averaged 74.6°F in Coles County, IL, the warmest 1 to 29 September in the county average since the data begin in 1951 (county average from NOAA gridded data, 1951 to 2026).

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

High
80.2°F
Warmest since 2025
27th warmest of 76
Low
47.3°F
Coldest since 2022
37th coldest of 76

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

Every 29 September low of the county average in Coles County, IL since 1951: 47.3°F in 2026; the lowest is 34.5°F, in 1951.
2022: 38.9°F1951: 34.5°F2026: 47.3°F 2026 47.3°F 1951 34.5°F since 2022 1951 2026
  • Normal range, 40.4 to 56.1°F
Every year as a table

Every 29 September high of the county average in Coles County, IL since 1951: 80.2°F in 2026; the highest is 95.5°F, in 1953.

YearHigh, °FLow, °F
202680.247.3
202590.255.9
202475.563.1
20237752.8
202263.838.9
202188.259.3
202065.945.1
201986.966.8
20187646.2
201775.345.1
201664.553.4
20158262.3
201484.252.1
201384.355.9
201270.648
201170.448.1
201073.946.1
200966.246.9
200881.853.7
200781.649.5
200663.440.5
200578.244.6
200470.942.4
200360.438.2
200281.453.8
200164.543.2
200070.344.2
199988.351.8
199882.458
199777.251.1
199667.643.5
199580.949.7
199471.644.5
199367.939.5
199268.337.9
199178.350.6
199077.857.2
19897441.1
198883.355.6
198782.258.9
198689.970.2
198573.745.4
198459.739.2
198382.752.4
198276.250.8
198168.944.7
198075.846.8
197981.858.8
197869.442.9
197772.446.5
197668.946.2
197570.744.1
197465.648.2
197382.467.9
197279.459.4
197188.367.4
197069.342
196973.543.6
196876.448.9
196755.536.6
196668.546.4
19657749.1
196465.641.5
196380.450
196267.337.4
196167.639.5
196078.549
195982.960.3
195866.940.7
195768.637.2
195680.645.4
19558156
195483.562.3
195395.552.4
195286.552.3
195160.634.5

The month

August 2026 averaged 74.7°F in Coles County, IL, the warmest August in the county average since 2021, tied 42nd warmest of 132 (with 2001 and 1987) (county average from NOAA's monthly county data, 1895 to 2026).

The month in words
  • Tuesday 29 September 2026: a high of 80.2°F averaged over Coles County, IL, the warmest 29 September in the county average since 2025, 27th warmest of 76 (county average from NOAA gridded data, 1951 to 2026).
  • Tuesday 29 September 2026: a low of 47.3°F averaged over Coles County, IL, the coldest 29 September night in the county average since 2022, 37th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
Days of the month without a value
0

Nearby

Springfield, IL 81.1 mi, the nearest city with its own station