Weather History for Napa County, CA

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Tuesday, September 11, 2012

  Actual Average Record
Temperature  
Mean Temperature 64 °F 65 °F  
Max Temperature 76 °F 80 °F 95 °F (2003)
Min Temperature 52 °F 50 °F 40 °F (2005)
Degree Days  
Heating Degree Days 1    
Month to date heating degree days 20  
Since 1 July heating degree days 75  
Cooling Degree Days 0    
Month to date cooling degree days 9  
Year to date cooling degree days 162  
Growing Degree Days 14 (Base 50)    
Moisture  
Dew Point 54 °F    
Average Humidity 70    
Maximum Humidity 93    
Minimum Humidity 46    
Precipitation  
Precipitation 0.00 in - 0.24 in (1985)
Month to date precipitation 0.00  
Year to date precipitation 13.77  
Since 1 July precipitation T  
Sea Level Pressure  
Sea Level Pressure 29.87 in    
Wind  
Wind Speed 7 mph (SSW)    
Max Wind Speed 22 mph    
Max Gust Speed 59 mph    
Visibility 9 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 11, 2012 Rise Set
Actual Time 6:47 AM PDT 7:22 PM PDT
Civil Twilight 6:21 AM PDT 7:49 PM PDT
Nautical Twilight 5:49 AM PDT 8:20 PM PDT
Astronomical Twilight 5:17 AM PDT 8:52 PM PDT
Moon 2:13 AM PDT (9/11) 4:33 PM PDT (9/11)
Length of Visible Light 13h 27m
Length of Day
12h 34m
Waning Crescent, 20% of the Moon is Illuminated
Sep 11
Waning Crescent
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 57.9 °F 54.0 °F 87% 29.83 in 10.0 mi SSW 6.9 mph - N/A   Clear
1:54 AM 57.0 °F 53.1 °F 87% 29.82 in 9.0 mi SSW 4.6 mph - N/A   Clear
2:54 AM 55.9 °F 52.0 °F 87% 29.82 in 8.0 mi South 5.8 mph - N/A   Clear
3:54 AM 55.9 °F 52.0 °F 87% 29.82 in 8.0 mi South 3.5 mph - N/A   Clear
4:50 AM 53.6 °F 51.8 °F 94% 29.85 in 8.0 mi SW 6.9 mph - N/A   Mostly Cloudy
4:54 AM 54.0 °F 51.1 °F 90% 29.82 in 8.0 mi SW 6.9 mph - N/A   Mostly Cloudy
5:54 AM 55.0 °F 52.0 °F 89% 29.84 in 8.0 mi SSW 3.5 mph - N/A   Overcast
6:54 AM 57.0 °F 53.1 °F 87% 29.86 in 8.0 mi Variable 3.5 mph - N/A   Overcast
7:54 AM 57.0 °F 53.1 °F 87% 29.88 in 6.0 mi SW 4.6 mph - N/A   Overcast
8:54 AM 59.0 °F 53.1 °F 81% 29.89 in 7.0 mi Calm Calm - N/A   Overcast
9:54 AM 62.1 °F 53.1 °F 72% 29.90 in 8.0 mi SSW 5.8 mph - N/A   Scattered Clouds
10:54 AM 64.0 °F 54.0 °F 70% 29.91 in 9.0 mi WSW 9.2 mph - N/A   Scattered Clouds
11:54 AM 68.0 °F 54.0 °F 61% 29.90 in 10.0 mi Variable 6.9 mph - N/A   Clear
12:54 PM 70.0 °F 54.0 °F 57% 29.89 in 10.0 mi SSW 8.1 mph - N/A   Clear
1:54 PM 72.0 °F 55.0 °F 55% 29.87 in 10.0 mi SSW 9.2 mph - N/A   Clear
2:54 PM 75.0 °F 54.0 °F 48% 29.86 in 10.0 mi SSW 11.5 mph - N/A   Clear
3:54 PM 75.0 °F 54.0 °F 48% 29.85 in 10.0 mi SSW 10.4 mph - N/A   Clear
4:54 PM 72.0 °F 55.9 °F 57% 29.84 in 10.0 mi South 11.5 mph - N/A   Clear
5:54 PM 68.0 °F 55.9 °F 65% 29.85 in 10.0 mi SSW 12.7 mph - N/A   Clear
6:54 PM 64.0 °F 55.0 °F 73% 29.86 in 10.0 mi South 3.5 mph - N/A   Clear
7:54 PM 61.0 °F 55.0 °F 81% 29.88 in 10.0 mi South 5.8 mph - N/A   Clear
8:54 PM 61.0 °F 55.9 °F 83% 29.90 in 10.0 mi SSW 5.8 mph - N/A   Clear
9:54 PM 57.9 °F 52.0 °F 81% 29.92 in 10.0 mi West 3.5 mph - N/A   Clear
10:54 PM 59.0 °F 55.0 °F 87% 29.93 in 9.0 mi SSW 8.1 mph - N/A   Clear
11:41 PM 57.2 °F 53.6 °F 88% 29.95 in 8.0 mi SSW 4.6 mph - N/A   Partly Cloudy
11:54 PM 57.0 °F 54.0 °F 89% 29.93 in 8.0 mi North - - N/A   Scattered Clouds