Is this weather normal in Napa County?

California · county records since 1895, through September 2026.

Weather › California › Napa County

10 of the last 12 months ran warmer than usual in Napa County. Napa County has warmed about 0.5° per decade since 1970.

This week

Usual for Oct 28 to Nov 3: highs near 70°, lows near 46°

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

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usual high for the datewarmercooler

The last 12 months

Oct: -1.6°OctNov: +2.1°NovDec: +1.0°DecJan 2026: +2.2°JanFeb: +2.1°FebMar: +9.1°MarApr: +0.6°AprMay: +1.7°MayJun: +1.5°JunJul: +0.7°JulAug: +1.1°AugSep: -1.3°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: +0.4 inOctNov: +1.0 inNovDec: -0.4 inDecJan 2026: -2.3 inJanFeb: -1.2 inFebMar: -4.3 inMarApr: +1.8 inAprMay: -0.2 inMayJun: -0.2 inJunJul: +0.0 inJulAug: -0.0 inAugSep: +0.0 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 Napa County

MonthUsual high / lowUsual rainWarmestColdest
January56° / 38°6.4 in53.1° 201437.3° 1937
February60° / 40°6.2 in55.2° 201543.5° 1949
March64° / 42°4.5 in62.0° 202646.2° 1897
April69° / 44°2.0 in60.9° 201345.8° 1967
May76° / 49°1.1 in69.3° 200155.5° 1998
June84° / 54°0.2 in74.3° 198162.5° 1923
July89° / 57°0.0 in77.8° 202468.4° 1987
August89° / 56°0.0 in76.6° 202066.8° 1911
September86° / 54°0.1 in73.8° 202063.2° 1911
October77° / 49°1.4 in69.4° 202057.1° 1916
November64° / 42°3.1 in57.5° 199546.1° 1994
December56° / 38°6.6 in51.5° 195841.0° 1932

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

Towns in Napa County

Crime Radar: Napa, St. Helena, Sonoma, Calistoga

Nearby counties