Weather History for Napa County, CA

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Saturday, December 8, 2012

  Actual Average Record
Temperature  
Mean Temperature 45 °F 46 °F  
Max Temperature 56 °F 57 °F 63 °F (2006)
Min Temperature 34 °F 36 °F 19 °F (2009)
Degree Days  
Heating Degree Days 20    
Month to date heating degree days 98  
Since 1 July heating degree days 670  
Cooling Degree Days 0    
Month to date cooling degree days 0  
Year to date cooling degree days 204  
Moisture  
Dew Point 39 °F    
Average Humidity 83    
Maximum Humidity 100    
Minimum Humidity 66    
Precipitation  
Precipitation 0.00 in - 1.34 in (1993)
Month to date precipitation 1.72  
Year to date precipitation 19.10  
Since 1 July precipitation 5.33  
Sea Level Pressure  
Sea Level Pressure 30.07 in    
Wind  
Wind Speed 1 mph (North)    
Max Wind Speed 8 mph    
Max Gust Speed 13 mph    
Visibility 4 miles    
Events Fog    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 08, 2012 Rise Set
Actual Time 7:13 AM PST 4:48 PM PST
Civil Twilight 6:44 AM PST 5:18 PM PST
Nautical Twilight 6:11 AM PST 5:51 PM PST
Astronomical Twilight 5:39 AM PST 6:23 PM PST
Moon 1:48 AM PST (12/8) 1:18 PM PST (12/8)
Length of Visible Light 10h 34m
Length of Day
9h 35m
Waning Crescent, 27% of the Moon is Illuminated
Dec 8
Waning Crescent
Dec 13
New
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:15 AM 39.2 °F - 37.4 °F 93% 30.09 in 1.8 mi Calm Calm - N/A   Clear
12:23 AM 41.0 °F 38.0 °F 37.4 °F 87% 30.09 in 1.2 mi North 4.6 mph - N/A   Partly Cloudy
12:27 AM 41.0 °F 38.0 °F 37.4 °F 87% 30.09 in 5.0 mi NNE 4.6 mph - N/A   Clear
12:54 AM 39.9 °F 36.7 °F 39.0 °F 97% 30.06 in 9.0 mi North 4.6 mph - N/A   Clear
1:54 AM 39.9 °F 36.7 °F 37.9 °F 93% 30.06 in 10.0 mi North 4.6 mph - N/A   Clear
2:35 AM 39.2 °F 37.0 °F 39.2 °F 100% 30.09 in 1.8 mi NW 3.5 mph - N/A   Partly Cloudy
2:39 AM 39.2 °F - 39.2 °F 100% 30.09 in 0.8 mi Calm Calm - N/A   Mist
2:47 AM 39.2 °F - 37.4 °F 93% 30.09 in 0.5 mi Calm Calm - N/A Fog Fog
2:54 AM 39.9 °F 37.8 °F 37.9 °F 93% 30.06 in 0.5 mi NNW 3.5 mph - N/A Fog Fog
3:54 AM 36.0 °F - 35.1 °F 97% 30.06 in 0.5 mi Calm Calm - N/A Fog Fog
4:07 AM 37.4 °F - 37.4 °F 100% 30.08 in 0.8 mi Calm Calm - N/A   Clear
4:17 AM 35.6 °F - 35.6 °F 100% 30.08 in 0.5 mi Calm Calm - N/A Fog Fog
4:41 AM 35.6 °F - 35.6 °F 100% 30.08 in 1.0 mi Calm Calm - N/A   Mist
4:44 AM 35.6 °F - 35.6 °F 100% 30.08 in 3.0 mi Calm Calm - N/A   Mostly Cloudy
4:52 AM 35.6 °F - 35.6 °F 100% 30.08 in 10.0 mi Calm Calm - N/A   Partly Cloudy
4:54 AM 36.0 °F - 35.1 °F 97% 30.05 in 10.0 mi Calm Calm - N/A   Partly Cloudy
5:06 AM 37.4 °F - 35.6 °F 93% 30.08 in 1.8 mi Calm Calm - N/A   Scattered Clouds
5:11 AM 37.4 °F - 35.6 °F 93% 30.08 in 0.8 mi Calm Calm - N/A   Mist
5:20 AM 35.6 °F 32.8 °F 35.6 °F 100% 30.07 in 0.2 mi North 3.5 mph - N/A Fog Fog
5:44 AM 37.4 °F 34.9 °F 35.6 °F 93% 30.07 in 1.0 mi Variable 3.5 mph - N/A   Mist
5:48 AM 37.4 °F 34.9 °F 35.6 °F 93% 30.08 in 3.0 mi Variable 3.5 mph - N/A   Mist
5:54 AM 39.0 °F - 37.0 °F 93% 30.05 in 8.0 mi Calm Calm - N/A   Unknown
6:08 AM 33.8 °F - 33.8 °F 100% 30.08 in 2.0 mi Calm Calm - N/A   Partly Cloudy
6:15 AM 33.8 °F - 32.0 °F 93% 30.08 in 1.0 mi Calm Calm - N/A   Mist
6:18 AM 33.8 °F - 32.0 °F 93% 30.08 in 0.8 mi Calm Calm - N/A   Mist
6:25 AM 33.8 °F - 33.8 °F 100% 30.09 in 0.2 mi Calm Calm - N/A Fog Fog
6:50 AM 33.8 °F - 33.8 °F 100% 30.08 in 0.8 mi Calm Calm - N/A   Mist
6:54 AM 34.0 °F - 33.1 °F 96% 30.06 in 0.8 mi Calm Calm - N/A   Mist
7:07 AM 33.8 °F - 33.8 °F 100% 30.09 in 0.2 mi Calm Calm - N/A   Mist
7:20 AM 35.6 °F - 33.8 °F 93% 30.09 in 0.2 mi Calm Calm - N/A Fog Fog
7:54 AM 36.0 °F - 35.1 °F 97% 30.07 in 0.2 mi Calm Calm - N/A Fog Fog
8:54 AM 41.0 °F - 39.0 °F 93% 30.09 in 0.2 mi Calm Calm - N/A Fog Fog
9:54 AM 44.1 °F - 43.0 °F 96% 30.11 in 0.2 mi Calm Calm - N/A Fog Fog
10:54 AM 44.1 °F - 44.1 °F 100% 30.11 in 0.2 mi Calm Calm - N/A Fog Fog
11:19 AM 44.6 °F - 44.6 °F 100% 30.12 in 1.0 mi Calm Calm - N/A   Overcast
11:40 AM 46.4 °F - 46.4 °F 100% 30.11 in 9.0 mi Calm Calm - N/A   Scattered Clouds
11:43 AM 48.2 °F - 46.4 °F 93% 30.11 in 9.0 mi Calm Calm - N/A   Scattered Clouds
11:54 AM 48.0 °F - 45.0 °F 89% 30.08 in 9.0 mi Calm Calm - N/A   Scattered Clouds
12:54 PM 55.0 °F - 45.0 °F 69% 30.05 in 10.0 mi Calm Calm - N/A   Partly Cloudy
1:54 PM 55.0 °F - 44.1 °F 67% 30.02 in 10.0 mi SW 5.8 mph - N/A   Clear
2:54 PM 55.0 °F - 44.1 °F 67% 30.02 in 10.0 mi Calm Calm - N/A   Clear
3:54 PM 55.9 °F - 45.0 °F 67% 30.03 in 10.0 mi Calm Calm - N/A   Clear
4:54 PM 53.1 °F - 44.1 °F 71% 30.02 in 10.0 mi Calm Calm - N/A   Clear
5:54 PM 46.9 °F - 44.1 °F 90% 30.03 in 10.0 mi Calm Calm - N/A   Clear
6:54 PM 45.0 °F - 42.1 °F 90% 30.04 in 10.0 mi Calm Calm - N/A   Clear
7:54 PM 43.0 °F - 41.0 °F 93% 30.05 in 10.0 mi Calm Calm - N/A   Clear
8:54 PM 44.1 °F 42.5 °F 41.0 °F 89% 30.05 in 10.0 mi ESE 3.5 mph - N/A   Clear
9:54 PM 41.0 °F 39.0 °F 39.0 °F 93% 30.06 in 10.0 mi NNE 3.5 mph - N/A   Clear
11:16 PM 42.8 °F 41.1 °F 39.2 °F 87% 30.11 in 1.5 mi NW 3.5 mph - N/A   Clear
11:26 PM 42.8 °F 39.3 °F 39.2 °F 87% 30.11 in 4.0 mi NNW 5.8 mph - N/A   Clear
11:54 PM 39.9 °F 37.8 °F 39.0 °F 97% 30.08 in 8.0 mi East 3.5 mph - N/A   Clear