Weather Almanac for Napa County, CA

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Wednesday, December 31, 2014

  Average Record
Temperature  
Mean Temperature 45 °F  
Max Temperature 54 °F 62 °F (2011)
Min Temperature 36 °F 27 °F (2012)
Degree Days  
Heating Degree Days    
Month to date heating degree days    
Since 1 July heating degree days    
Cooling Degree Days    
Month to date cooling degree days    
Year to date cooling degree days    
Moisture  
Dew Point    
Average Humidity    
Maximum Humidity    
Minimum Humidity    
Precipitation  
Precipitation - 2.00 in (2005)
Month to date precipitation    
Year to date precipitation    
Since 1 July precipitation    
Wind  
Wind Speed    
Max Wind Speed    
Max Gust Speed    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 31, 2014 Rise Set
Actual Time 7:25 AM PST 4:58 PM PST
Civil Twilight 6:56 AM PST 5:28 PM PST
Nautical Twilight 6:23 AM PST 6:01 PM PST
Astronomical Twilight 5:50 AM PST 6:33 PM PST
Moon 1:51 PM PST (12/31) 3:00 AM PST (12/31)
Length of Visible Light 10h 32m
Length of Day
9h 33m
Waxing Gibbous, 81% of the Moon is Illuminated
Dec 31
Waxing Gibbous
Jan 4
Full
Jan 13
Last Quarter
Jan 20
New
Jan 26
First Quarter

No daily or hourly history data available