Is this weather normal in St. Clair County?

Michigan · county records since 1895, through September 2026.

Weather › Michigan › St. Clair County

St. Clair County's warmest year in 131 on record was 2024, at 52.6° on average. St. Clair County has warmed about 0.7° per decade since 1970.

This week

Usual for Oct 28 to Nov 3: highs near 53°, lows near 38°

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

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usual high for the datewarmercooler

The last 12 months

Oct: +3.5°OctNov: 0.0°NovDec: -3.7°DecJan 2026: -3.8°JanFeb: -0.8°FebMar: +4.5°MarApr: +4.8°AprMay: -1.6°MayJun: +0.2°JunJul: +2.8°JulAug: +2.0°AugSep: +2.8°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: -0.9 inOctNov: -1.0 inNovDec: +1.0 inDecJan 2026: +0.2 inJanFeb: -1.1 inFebMar: +1.4 inMarApr: +2.6 inAprMay: -2.0 inMayJun: +0.9 inJunJul: -0.4 inJulAug: -0.1 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 St. Clair County

MonthUsual high / lowUsual rainWarmestColdest
January31° / 18°2.3 in34.2° 19329.7° 1912
February33° / 19°1.9 in35.6° 202410.8° 1904
March43° / 26°2.2 in47.3° 201222.6° 1900
April56° / 36°3.1 in52.3° 195537.7° 1907
May68° / 47°3.6 in63.7° 189648.5° 1907
June78° / 57°3.3 in72.1° 200560.4° 1903
July82° / 62°3.3 in76.6° 195566.6° 1992
August80° / 61°3.2 in74.8° 194764.1° 1927
September73° / 54°3.1 in67.9° 201555.2° 1918
October60° / 43°2.9 in58.9° 202142.4° 1925
November47° / 33°2.6 in46.5° 200131.7° 1951
December36° / 25°2.2 in40.2° 201516.6° 1989

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

Towns in St. Clair County

Crime Radar: Port Huron, Marysville, St. Clair, Richmond, Marine City

Nearby counties