Is this weather normal in Cass County?

Illinois · county records since 1895, through September 2026.

Weather › Illinois › Cass County

Cass County just had its warmest September ever recorded, +7° against the usual. Cass County has warmed about 0.4° per decade since 1970.

This week

Usual for Oct 28 to Nov 3: highs near 59°, lows near 38°

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

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usual high for the datewarmercooler

The last 12 months

Oct: +6.0°OctNov: +1.6°NovDec: -2.4°DecJan 2026: -2.3°JanFeb: +3.7°FebMar: +7.1°MarApr: +6.2°AprMay: -0.6°MayJun: -0.2°JunJul: +1.2°JulAug: +1.1°AugSep: +7.2°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: -1.5 inOctNov: -0.8 inNovDec: -1.0 inDecJan 2026: -0.9 inJanFeb: -1.5 inFebMar: +3.1 inMarApr: +2.5 inAprMay: -2.2 inMayJun: +3.9 inJunJul: -2.0 inJulAug: +1.6 inAugSep: -1.4 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 Cass County

MonthUsual high / lowUsual rainWarmestColdest
January35° / 19°2.0 in38.5° 200610.3° 1977
February40° / 23°1.9 in41.3° 201716.6° 1978
March52° / 32°2.6 in55.6° 201225.5° 1960
April65° / 41°4.0 in60.1° 189644.7° 1907
May75° / 53°4.8 in72.6° 201856.9° 1924
June83° / 62°4.5 in79.8° 193466.6° 1928
July86° / 65°3.8 in85.1° 193670.3° 2014
August85° / 63°3.6 in82.3° 194767.5° 1915
September79° / 55°3.4 in74.2° 202659.7° 1918
October67° / 43°3.1 in65.0° 196344.9° 1925
November52° / 33°2.7 in50.0° 200134.2° 1976
December40° / 24°2.1 in40.7° 201516.1° 1983

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

Towns in Cass County

Crime Radar: Beardstown

Nearby counties