Weather History for Napa County, CA

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Sunday, August 18, 2013

  Actual Average Record
Temperature  
Mean Temperature 75 °F 66 °F  
Max Temperature 91 °F 80 °F 91 °F (2013)
Min Temperature 59 °F 52 °F 46 °F (2007)
Degree Days  
Heating Degree Days 0    
Month to date heating degree days 16  
Since 1 June heating degree days 66  
Since 1 July heating degree days 36  
Cooling Degree Days 10    
Month to date cooling degree days 36  
Year to date cooling degree days 184  
Since 1 June cooling degree days 164  
Growing Degree Days 25 (Base 50)    
Moisture  
Dew Point 59 °F    
Average Humidity 63    
Maximum Humidity 90    
Minimum Humidity 36    
Precipitation  
Precipitation 0.00 in - 0.32 in (1976)
Month to date precipitation 0.00  
Year to date precipitation 1.97  
Since 1 July precipitation 0.00  
Sea Level Pressure  
Sea Level Pressure 29.82 in    
Wind  
Wind Speed 5 mph (SSW)    
Max Wind Speed 18 mph    
Max Gust Speed 30 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Aug. 18, 2013 Rise Set
Actual Time 6:26 AM PDT 7:58 PM PDT
Civil Twilight 5:58 AM PDT 8:26 PM PDT
Nautical Twilight 5:25 AM PDT 8:59 PM PDT
Astronomical Twilight 4:49 AM PDT 9:34 PM PDT
Moon 6:07 PM PDT (8/18) 3:43 AM PDT (8/18)
Length of Visible Light 14h 27m
Length of Day
13h 31m
Waxing Gibbous, 93% of the Moon is Illuminated
Aug 18
Waxing Gibbous
Aug 20
Full
Aug 28
Last Quarter
Sep 5
New
Sep 12
First Quarter

Hourly Weather History & Observations

Time (PDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 61.0 °F - 57.9 °F 90% 29.85 in 10.0 mi SSW 8.1 mph - N/A   Clear
1:54 AM 61.0 °F - 57.9 °F 90% 29.84 in 10.0 mi SSW 10.4 mph - N/A   Clear
2:54 AM 61.0 °F - 57.9 °F 90% 29.84 in 10.0 mi SW 8.1 mph - N/A   Clear
3:08 AM 60.8 °F - 57.2 °F 88% 29.86 in 10.0 mi SW 10.4 mph - N/A   Partly Cloudy
3:43 AM 60.8 °F - 57.2 °F 88% 29.86 in 9.0 mi WSW 6.9 mph - N/A   Mostly Cloudy
3:54 AM 61.0 °F - 57.9 °F 90% 29.84 in 9.0 mi WSW 4.6 mph - N/A   Mostly Cloudy
4:54 AM 60.1 °F - 57.0 °F 90% 29.84 in 8.0 mi WSW 6.9 mph - N/A   Overcast
5:54 AM 60.1 °F - 57.0 °F 90% 29.85 in 8.0 mi WSW 5.8 mph - N/A   Overcast
6:54 AM 60.1 °F - 57.0 °F 90% 29.86 in 8.0 mi SSW 3.5 mph - N/A   Overcast
7:54 AM 60.1 °F - 57.0 °F 90% 29.86 in 9.0 mi Calm Calm - N/A   Overcast
8:54 AM 63.0 °F - 57.9 °F 84% 29.87 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:21 AM 64.4 °F - 57.2 °F 77% 29.89 in 10.0 mi Variable 4.6 mph - N/A   Scattered Clouds
9:54 AM 66.0 °F - 57.9 °F 75% 29.87 in 10.0 mi South 4.6 mph - N/A   Scattered Clouds
10:54 AM 69.1 °F - 57.9 °F 68% 29.86 in 10.0 mi Variable 3.5 mph - N/A   Clear
11:54 AM 73.9 °F - 59.0 °F 59% 29.85 in 10.0 mi WSW 5.8 mph - N/A   Scattered Clouds
12:54 PM 77.0 °F - 60.1 °F 56% 29.83 in 10.0 mi SSW 4.6 mph - N/A   Clear
1:54 PM 81.0 °F 81.3 °F 59.0 °F 47% 29.81 in 10.0 mi SSW 6.9 mph - N/A   Clear
2:54 PM 87.1 °F 86.1 °F 57.9 °F 37% 29.79 in 10.0 mi SSW 4.6 mph - N/A   Clear
3:54 PM 88.0 °F 87.1 °F 59.0 °F 37% 29.76 in 10.0 mi SW 6.9 mph - N/A   Clear
4:54 PM 90.0 °F 89.1 °F 59.0 °F 35% 29.75 in 10.0 mi South 6.9 mph - N/A   Clear
5:54 PM 88.0 °F 87.9 °F 61.0 °F 40% 29.74 in 10.0 mi South 9.2 mph - N/A   Clear
6:54 PM 82.0 °F 82.7 °F 61.0 °F 49% 29.74 in 10.0 mi SSW 11.5 mph - N/A   Clear
7:54 PM 77.0 °F - 61.0 °F 58% 29.75 in 10.0 mi South 4.6 mph - N/A   Clear
8:54 PM 73.9 °F - 60.1 °F 62% 29.75 in 10.0 mi South 3.5 mph - N/A   Clear
9:54 PM 69.1 °F - 59.0 °F 70% 29.76 in 10.0 mi Calm Calm - N/A   Clear
10:54 PM 68.0 °F - 60.1 °F 76% 29.75 in 10.0 mi South 5.8 mph - N/A   Clear
11:54 PM 64.9 °F - 59.0 °F 81% 29.78 in 10.0 mi WSW 4.6 mph - N/A   Clear