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