Weather History for Napa County, CA

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Sunday, December 4, 2011

  Actual Average Record
Temperature  
Mean Temperature 45 °F 47 °F  
Max Temperature 60 °F 57 °F 64 °F (2002)
Min Temperature 30 °F 36 °F 22 °F (2004)
Degree Days  
Heating Degree Days 20    
Month to date heating degree days 45  
Since 1 July heating degree days 715  
Cooling Degree Days 0    
Month to date cooling degree days 0  
Year to date cooling degree days 175  
Moisture  
Dew Point 30 °F    
Average Humidity 59    
Maximum Humidity 85    
Minimum Humidity 33    
Precipitation  
Precipitation 0.00 in - 2.00 in (1970)
Month to date precipitation 0.00  
Year to date precipitation 19.27  
Since 1 July precipitation 3.42  
Sea Level Pressure  
Sea Level Pressure 30.19 in    
Wind  
Wind Speed 3 mph (South)    
Max Wind Speed 8 mph    
Max Gust Speed 15 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 04, 2011 Rise Set
Actual Time 7:09 AM PST 4:48 PM PST
Civil Twilight 6:40 AM PST 5:18 PM PST
Nautical Twilight 6:07 AM PST 5:50 PM PST
Astronomical Twilight 5:35 AM PST 6:22 PM PST
Moon 1:18 PM PST (12/4) 1:43 AM PST (12/4)
Length of Visible Light 10h 37m
Length of Day
9h 39m
Waxing Gibbous, 72% of the Moon is Illuminated
Dec 4
Waxing Gibbous
Dec 10
Full
Dec 17
Last Quarter
Dec 24
New
Dec 31
First Quarter

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 42.1 °F 39.2 °F 21.9 °F 45% 30.22 in 10.0 mi ENE 4.6 mph - N/A   Clear
1:54 AM 39.0 °F 35.7 °F 21.9 °F 50% 30.23 in 10.0 mi SE 4.6 mph - N/A   Clear
2:54 AM 36.0 °F - 23.0 °F 59% 30.25 in 10.0 mi Calm Calm - N/A   Clear
3:54 AM 36.0 °F - 24.1 °F 62% 30.24 in 10.0 mi Calm Calm - N/A   Clear
4:54 AM 33.1 °F - 24.1 °F 70% 30.23 in 10.0 mi Calm Calm - N/A   Clear
5:54 AM 30.0 °F 26.5 °F 24.1 °F 79% 30.24 in 10.0 mi East 3.5 mph - N/A   Clear
6:54 AM 30.0 °F 26.5 °F 24.1 °F 79% 30.25 in 10.0 mi ESE 3.5 mph - N/A   Clear
7:54 AM 33.1 °F 30.0 °F 25.0 °F 72% 30.26 in 10.0 mi North 3.5 mph - N/A   Clear
8:54 AM 46.0 °F 44.8 °F 30.9 °F 56% 30.26 in 10.0 mi North 3.5 mph - N/A   Clear
9:54 AM 53.1 °F - 32.0 °F 45% 30.26 in 10.0 mi Calm Calm - N/A   Clear
10:54 AM 55.0 °F - 34.0 °F 45% 30.24 in 10.0 mi WSW 5.8 mph - N/A   Clear
11:54 AM 57.9 °F - 30.0 °F 35% 30.20 in 10.0 mi SW 6.9 mph - N/A   Clear
12:54 PM 59.0 °F - 30.0 °F 33% 30.17 in 10.0 mi WSW 5.8 mph - N/A   Clear
1:54 PM 59.0 °F - 34.0 °F 39% 30.15 in 10.0 mi SW 6.9 mph - N/A   Clear
2:54 PM 59.0 °F - 37.9 °F 46% 30.13 in 10.0 mi SSW 5.8 mph - N/A   Clear
3:54 PM 57.0 °F - 41.0 °F 55% 30.13 in 10.0 mi SW 3.5 mph - N/A   Clear
4:54 PM 51.1 °F - 39.0 °F 63% 30.12 in 10.0 mi Calm Calm - N/A   Clear
5:54 PM 43.0 °F - 36.0 °F 76% 30.13 in 10.0 mi Calm Calm - N/A   Clear
6:54 PM 37.9 °F - 33.1 °F 83% 30.15 in 10.0 mi Calm Calm - N/A   Clear
7:54 PM 36.0 °F 33.3 °F 30.9 °F 82% 30.14 in 10.0 mi East 3.5 mph - N/A   Clear
8:54 PM 35.1 °F - 30.0 °F 82% 30.14 in 10.0 mi Calm Calm - N/A   Clear
9:54 PM 33.1 °F - 28.0 °F 82% 30.14 in 10.0 mi Calm Calm - N/A   Clear
11:54 PM 33.1 °F 28.7 °F 30.0 °F 89% 30.14 in 10.0 mi SE 4.6 mph - N/A   Clear