Is this weather normal in McDonough County?

Illinois · county records since 1895, through September 2026.

Weather › Illinois › McDonough County

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

This week

Usual for Oct 28 to Nov 3: highs near 58°, lows near 37°

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

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usual high for the datewarmercooler

The last 12 months

Oct: +6.1°OctNov: +1.8°NovDec: -2.4°DecJan 2026: -1.9°JanFeb: +6.2°FebMar: +6.8°MarApr: +5.4°AprMay: -0.4°MayJun: -0.5°JunJul: +1.6°JulAug: +0.4°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: -1.9 inOctNov: -1.1 inNovDec: +0.1 inDecJan 2026: -1.2 inJanFeb: -1.8 inFebMar: +1.4 inMarApr: +3.7 inAprMay: -3.3 inMayJun: +4.9 inJunJul: -2.0 inJulAug: +5.3 inAugSep: -0.6 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 McDonough County

MonthUsual high / lowUsual rainWarmestColdest
January33° / 17°1.8 in36.7° 19339.5° 1977
February38° / 21°1.9 in40.6° 202413.7° 1936
March50° / 30°2.5 in54.0° 201223.9° 1960
April63° / 40°4.0 in58.8° 201043.4° 2018
May74° / 52°5.1 in70.9° 201856.0° 1924
June82° / 62°4.9 in79.8° 193465.8° 1903
July85° / 65°4.1 in84.7° 193669.4° 2009
August84° / 63°3.7 in81.4° 194766.5° 1915
September78° / 55°3.7 in72.4° 189759.1° 1918
October65° / 43°3.1 in64.9° 196343.1° 1925
November50° / 32°2.6 in49.8° 200132.7° 1976
December38° / 22°2.0 in39.2° 201514.4° 1983

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

Towns in McDonough County

Crime Radar: Macomb

Nearby counties