Is this weather normal in San Joaquin County?

California · county records since 1895, through September 2026.

Weather › California › San Joaquin County

10 of the last 12 months ran warmer than usual in San Joaquin County. San Joaquin County has warmed about 0.6° per decade since 1970.

This week

Usual for Oct 28 to Nov 3: highs near 72°, lows near 47°

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

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usual high for the datewarmercooler

The last 12 months

Oct: -1.0°OctNov: +1.6°NovDec: +1.2°DecJan 2026: +2.6°JanFeb: +2.4°FebMar: +9.4°MarApr: +1.1°AprMay: +1.6°MayJun: +1.7°JunJul: +0.5°JulAug: +2.1°AugSep: -1.1°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: +1.2 inOctNov: +2.0 inNovDec: -0.8 inDecJan 2026: -0.9 inJanFeb: +0.8 inFebMar: -2.0 inMarApr: +1.9 inAprMay: -0.3 inMayJun: -0.1 inJunJul: 0.0 inJulAug: +0.0 inAugSep: -0.1 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 San Joaquin County

MonthUsual high / lowUsual rainWarmestColdest
January56° / 39°2.9 in51.8° 201837.9° 1937
February62° / 42°2.7 in56.2° 196345.4° 1903
March67° / 44°2.1 in65.3° 202648.3° 1897
April73° / 47°1.2 in63.9° 198750.2° 1967
May81° / 52°0.6 in72.6° 200159.3° 1998
June88° / 57°0.1 in77.7° 198165.9° 1952
July93° / 60°0.0 in82.7° 202471.3° 1987
August92° / 59°0.0 in80.5° 202070.8° 1954
September89° / 57°0.1 in77.1° 202266.4° 1925
October79° / 51°0.7 in70.0° 202458.4° 1916
November66° / 43°1.5 in59.4° 199548.7° 1994
December57° / 39°2.7 in52.7° 201440.4° 1963

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

Towns in San Joaquin County

Crime Radar: Stockton, Tracy, Manteca, Lodi

Nearby counties