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Vermilion County, IL

: September 2026 so far averaged 72.6°F in Vermilion 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
78.8°F
Warmest since 2025
27th warmest of 76
Low
46.6°F
Coldest since 2022
38th coldest of 76

No measurable precipitation in the county average of Vermilion 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 Vermilion County, IL since 1951: 46.6°F in 2026; the lowest is 33.1°F, in 1951.
2022: 37.1°F1951: 33.1°F2026: 46.6°F 2026 46.6°F 1951 33.1°F since 2022 1951 2026
  • Normal range, 38.3 to 54.2°F
Every year as a table

Every 29 September high of the county average in Vermilion County, IL since 1951: 78.8°F in 2026; the highest is 94.7°F, in 1953.

YearHigh, °FLow, °F
202678.846.6
202589.555.6
20247562.6
202374.652.8
20226337.1
202185.256.7
202064.843
201983.164.5
201876.843.1
201773.745.7
201664.552.9
201581.461.9
201483.151.1
20138454.1
201270.445.2
201168.246.5
201073.942.8
200964.948.7
200880.651.9
200780.747.5
200662.238.3
20057942.9
200469.543.2
200359.736.2
200279.852.3
200160.942.5
200070.641.3
199986.252.3
199882.554.7
199776.149.2
199667.542
199582.248.6
199468.842.5
199366.537.9
199266.936.5
199174.947.7
199075.656.3
198974.140.4
198882.555.3
198782.658.5
198689.167.9
198574.443.5
198458.736.6
198381.150.5
198274.949
198168.343.3
198076.545.3
197981.356
197868.741.3
197771.544.7
197667.543.3
197571.243.5
197467.447.3
197382.466.9
197276.456.8
197186.967.4
197067.437.7
196971.542.7
196872.945.7
196755.536.8
196667.646.8
196575.948.8
196465.337.9
196381.148.4
196266.536
196166.736.3
19607746.3
195982.159.2
19586740.5
195768.136
195680.347.2
195577.252.9
19548362.6
195394.752
195286.252.5
19516133.1

The month

August 2026 averaged 72.8°F in Vermilion County, IL, the warmest August in the county average since 2021, tied 57th warmest of 132 (with 1954 and 1949) (county average from NOAA's monthly county data, 1895 to 2026).

The month in words
  • Tuesday 29 September 2026: a high of 78.8°F averaged over Vermilion 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 46.6°F averaged over Vermilion County, IL, the coldest 29 September night in the county average since 2022, 38th coldest of 76 (county average from NOAA gridded data, 1951 to 2026).
Days of the month without a value
0

Nearby

Indianapolis, IN 82.9 mi, the nearest city with its own station