Is this weather normal in Henderson County?

Illinois · county records since 1895, through September 2026.

Weather › Illinois › Henderson County

Henderson County just had its 4th-warmest September in 132 years, +6° against the usual. Henderson County has warmed about 0.4° per decade since 1970.

This week

Usual for Oct 28 to Nov 3: highs near 57°, lows near 37°

That is the 1991 to 2020 average for these dates in Henderson County. The Weather Service forecast fills in below.

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usual high for the datewarmercooler

The last 12 months

Oct: +6.2°OctNov: +2.1°NovDec: -2.2°DecJan 2026: -1.4°JanFeb: +6.5°FebMar: +6.4°MarApr: +5.6°AprMay: +0.2°MayJun: -0.3°JunJul: +1.8°JulAug: +0.7°AugSep: +5.5°Sepwarmercooler

Each bar is a month's average temperature against the usual for that month (1991 to 2020). Ranks compare the same month in every year since 1895.

Every year since 1895

18952025

Rain and drought

Oct: -1.6 inOctNov: -1.1 inNovDec: +0.2 inDecJan 2026: -0.8 inJanFeb: -1.6 inFebMar: +0.4 inMarApr: +2.9 inAprMay: -3.1 inMayJun: +2.8 inJunJul: -1.3 inJulAug: +4.5 inAugSep: +0.2 inSepwetterdrier

Rain and melted snow against the usual for each month. The drought reading is NOAA's Palmer index for the county.

Month by month in Henderson County

MonthUsual high / lowUsual rainWarmestColdest
January32° / 16°1.6 in36.0° 20069.0° 1912
February37° / 20°1.8 in39.9° 202412.6° 1936
March50° / 30°2.5 in53.8° 201223.1° 1960
April63° / 40°3.8 in58.8° 201042.7° 2018
May73° / 52°5.0 in70.1° 201855.7° 1907
June82° / 62°4.8 in79.5° 193465.4° 1903
July85° / 65°4.0 in84.8° 193669.7° 2009
August84° / 63°3.7 in81.4° 194766.9° 1915
September77° / 55°3.5 in72.5° 189759.0° 1918
October65° / 43°3.0 in65.1° 196342.4° 1925
November50° / 31°2.4 in49.9° 200131.7° 1911
December37° / 21°1.9 in38.5° 201513.9° 1983

Warmest and coldest are the month's whole-month average temperature, with the year it happened.

Towns in Henderson County

Nearby counties