Is this weather normal in Calhoun County?

Illinois · county records since 1895, through September 2026.

Weather › Illinois › Calhoun County

Calhoun County just had its warmest September ever recorded, +8° against the usual. Calhoun County is in severe drought: NOAA's Palmer reading for September was -3.5.

This week

Usual for Oct 28 to Nov 3: highs near 61°, lows near 40°

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

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usual high for the datewarmercooler

The last 12 months

Oct: +5.7°OctNov: +2.1°NovDec: +0.1°DecJan 2026: -2.2°JanFeb: +4.3°FebMar: +7.6°MarApr: +6.5°AprMay: -0.6°MayJun: +0.5°JunJul: +1.6°JulAug: +1.1°AugSep: +8.1°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: -1.4 inOctNov: -1.3 inNovDec: -1.9 inDecJan 2026: -1.3 inJanFeb: -1.4 inFebMar: +1.2 inMarApr: +1.5 inAprMay: -1.1 inMayJun: +0.8 inJunJul: -1.9 inJulAug: -0.9 inAugSep: -1.8 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 Calhoun County

MonthUsual high / lowUsual rainWarmestColdest
January38° / 21°2.2 in40.6° 200612.4° 1940
February43° / 25°2.0 in43.4° 201718.5° 1978
March54° / 34°3.1 in57.3° 201228.3° 1960
April66° / 43°4.3 in61.6° 189645.6° 1907
May76° / 54°4.9 in72.9° 201857.9° 1924
June84° / 63°4.5 in79.6° 195267.3° 1903
July88° / 67°4.0 in85.7° 193672.0° 2009
August86° / 65°3.5 in83.3° 193668.6° 1915
September80° / 57°3.3 in76.3° 202660.3° 1918
October68° / 45°3.1 in66.0° 196347.3° 1925
November54° / 35°3.1 in51.4° 200135.6° 1976
December42° / 26°2.3 in43.1° 202118.3° 1983

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

Towns in Calhoun County

Nearby counties