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Napa Metro Area Weather

 

The average temperature of Napa Area is 59.39°F, which is lower than the California average temperature of 61.17°F and is higher than the national average temperature of 54.45°F.

Topics:Heating Cost IndexCooling Cost IndexHistorical TemperatureHistorical PrecipitationHistorical SnowHistorical HumidityHistorical Wind Speed

Historical Weather

Heating Cost Index, #124

Napa Area
75.92
California
61.47
U.S.
212.91

Cooling Cost Index, #507

Napa Area
157.90
California
167.34
U.S.
139.42

The Heating Cost Index and the Cooling Cost Index are indicators of the relative heating and cooling cost of an area. They were calculated based on the average temperate and duration of the hot and cold days for the area. Please note, the actual heating cost and cooling cost are also dependent on other factors specific to individual residences such as the size of the house, the insulation condition, and the equipment efficiency, etc.

Average Temperature

Annual Average Temperature, #299
Napa Area
59.4 °F
California
61.2 °F
U.S.
54.5 °F

Ranks: Average Max. Temperature: #245, Average Min. Temperature: #353

Precipitation

Average Annual Precipitation, #531
Napa Area
38.83 inches
California
22.97 inches
U.S.
38.67 inches


Average Number of Days with 0.1 Inch or More Precipitation in a Year (this gives an indication of the number of days in a year that it is useful to have an umbrella), #765
Napa Area
47.99 days
California
34.63 days
U.S.
66.51 days


Snow

Average Annual Snowfall, #836
Napa Area
0.09 inches
California
3.76 inches
U.S.
23.27 inches


Average Number of Days with 1 Inch or More Snow Depth in a Year, #845
Napa Area
0.02 days
California
2.28 days
U.S.
27.17 days


Humidity

Annual Average Humidity, #60
Napa Area
82.29%
California
80.36%
U.S.
77.52%


Wind Speed

Annual Average Wind Speed, #333
Napa Area
18.15 mph
California
13.54 mph
U.S.
16.93 mph


* The temperature, snow fall, and precipitation information on this page were calculated from the historical data of 18,000+ U.S weather stations for the period of time from 1980 to 2010. The humidity and wind speed information were calculated from data from 15,000 worldwide stations for the period of time from 1980 to 2010.


 
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