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Climate & Weather Averages in Napa, California, USA

Currently: 64 °F. Clear. (Weather station: Napa County Airport, USA). See more current weather

Annual Weather Averages Near Napa

Averages are for Napa County Airport, which is 6 miles from Napa.

Based on weather reports collected during 1992–2021.

All Year Climate & Weather Averages in Napa

High Temp: 80 °F

Low Temp: 37 °F

Mean Temp: 58 °F

Precipitation: 1.85"

Humidity: 69%

Dew Point: 47 °F

Wind: 12 mph

Pressure: 29.99 "Hg

Visibility: 10 mi

January Climate & Weather Averages in Napa

High Temp: 57 °F

Low Temp: 38 °F

Mean Temp: 48 °F

Precipitation: 4.46"

Humidity: 81%

Dew Point: 42 °F

Wind: 10 mph

Pressure: 30.12 "Hg

Visibility: 7 mi

February Climate & Weather Averages in Napa

High Temp: 61 °F

Low Temp: 39 °F

Mean Temp: 50 °F

Precipitation: 4.21"

Humidity: 76%

Dew Point: 43 °F

Wind: 10 mph

Pressure: 30.06 "Hg

Visibility: 9 mi

March Climate & Weather Averages in Napa

High Temp: 65 °F

Low Temp: 41 °F

Mean Temp: 53 °F

Precipitation: 2.88"

Humidity: 73%

Dew Point: 45 °F

Wind: 11 mph

Pressure: 30.04 "Hg

Visibility: 10 mi

April Climate & Weather Averages in Napa

High Temp: 68 °F

Low Temp: 43 °F

Mean Temp: 56 °F

Precipitation: 1.35"

Humidity: 68%

Dew Point: 46 °F

Wind: 13 mph

Pressure: 30.01 "Hg

Visibility: 11 mi

May Climate & Weather Averages in Napa

High Temp: 73 °F

Low Temp: 47 °F

Mean Temp: 60 °F

Precipitation: 0.88"

Humidity: 66%

Dew Point: 49 °F

Wind: 16 mph

Pressure: 29.94 "Hg

Visibility: 10 mi

June Climate & Weather Averages in Napa

High Temp: 78 °F

Low Temp: 52 °F

Mean Temp: 65 °F

Precipitation: 0.23"

Humidity: 61%

Dew Point: 51 °F

Wind: 18 mph

Pressure: 29.89 "Hg

Visibility: 11 mi

July Climate & Weather Averages in Napa

High Temp: 79 °F

Low Temp: 54 °F

Mean Temp: 66 °F

Precipitation: 0.01"

Humidity: 64%

Dew Point: 54 °F

Wind: 18 mph

Pressure: 29.90 "Hg

Visibility: 11 mi

August Climate & Weather Averages in Napa

High Temp: 80 °F

Low Temp: 54 °F

Mean Temp: 67 °F

Precipitation: 0.05"

Humidity: 64%

Dew Point: 54 °F

Wind: 16 mph

Pressure: 29.89 "Hg

Visibility: 10 mi

September Climate & Weather Averages in Napa

High Temp: 80 °F

Low Temp: 51 °F

Mean Temp: 66 °F

Precipitation: 0.08"

Humidity: 62%

Dew Point: 52 °F

Wind: 12 mph

Pressure: 29.89 "Hg

Visibility: 10 mi

October Climate & Weather Averages in Napa

High Temp: 75 °F

Low Temp: 46 °F

Mean Temp: 60 °F

Precipitation: 1.30"

Humidity: 62%

Dew Point: 47 °F

Wind: 9 mph

Pressure: 29.97 "Hg

Visibility: 10 mi

November Climate & Weather Averages in Napa

High Temp: 65 °F

Low Temp: 40 °F

Mean Temp: 53 °F

Precipitation: 2.19"

Humidity: 73%

Dew Point: 44 °F

Wind: 8 mph

Pressure: 30.07 "Hg

Visibility: 9 mi

December Climate & Weather Averages in Napa

High Temp: 57 °F

Low Temp: 37 °F

Mean Temp: 47 °F

Precipitation: 4.51"

Humidity: 79%

Dew Point: 41 °F

Wind: 10 mph

Pressure: 30.11 "Hg

Visibility: 8 mi

Quick Climate Info

Hottest MonthAugust (67 °F avg)
Coldest MonthDecember (47 °F avg)
Wettest MonthDecember (4.51" avg)
Windiest MonthJuly (18 mph avg)
Annual precip.22.14" (per year)

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