Is this weather normal in Rock County?

Wisconsin · county records since 1895, through September 2026.

Weather › Wisconsin › Rock County

Rock County's warmest year in 131 on record was 2024, at 51.4° on average. Rock County has warmed about 0.5° per decade since 1970.

This week

Usual for Oct 28 to Nov 3: highs near 53°, lows near 35°

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

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usual high for the datewarmercooler

The last 12 months

Oct: +5.2°OctNov: +1.1°NovDec: -3.5°DecJan 2026: -2.7°JanFeb: +5.2°FebMar: +4.7°MarApr: +5.6°AprMay: +0.3°MayJun: -0.1°JunJul: +2.9°JulAug: +0.3°AugSep: +3.6°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: -1.3 inOctNov: -0.8 inNovDec: -0.4 inDecJan 2026: -0.5 inJanFeb: -1.2 inFebMar: +0.3 inMarApr: +5.6 inAprMay: -3.5 inMayJun: +3.0 inJunJul: -2.9 inJulAug: +1.9 inAugSep: +2.5 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 Rock County

MonthUsual high / lowUsual rainWarmestColdest
January28° / 12°1.5 in32.7° 20062.5° 1912
February33° / 16°1.6 in35.9° 19986.0° 1936
March45° / 26°2.1 in50.0° 201220.4° 1960
April58° / 36°3.6 in55.0° 191537.9° 2018
May70° / 47°4.3 in66.2° 189650.8° 1907
June80° / 57°5.4 in75.7° 193362.0° 1916
July83° / 62°4.0 in79.7° 190166.2° 2009
August81° / 60°4.2 in77.2° 194763.5° 1915
September74° / 52°3.7 in68.4° 193156.3° 1918
October61° / 40°2.9 in59.7° 196339.1° 1925
November46° / 29°2.4 in46.9° 200127.5° 1951
December33° / 19°1.9 in36.5° 201511.6° 1983

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

Towns in Rock County

Crime Radar: Janesville, Beloit, Milton, Edgerton, Evansville

Nearby counties