Napa County, CA

7:19 AM PDT on April 23, 2018 (GMT -0700)
Napa County

Weather History for KAPC - May, 2009

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Sunday, May 10, 2009

  Actual Average Record
Temperature  
Mean Temperature 61 °F 58 °F  
Max Temperature 77 °F 71 °F 88 °F (2001)
Min Temperature 44 °F 45 °F 36 °F (2005)
Degree Days  
Heating Degree Days 4    
Month to date heating degree days 64  
Since 1 July heating degree days 3066  
Cooling Degree Days 0    
Month to date cooling degree days 0  
Year to date cooling degree days 8  
Growing Degree Days 10 (Base 50)    
Moisture  
Dew Point 49 °F    
Average Humidity 67    
Maximum Humidity 93    
Minimum Humidity 41    
Precipitation  
Precipitation 0.01 in - 0.49 in (1917)
Month to date precipitation 1.05  
Year to date precipitation 11.40  
Since 1 July precipitation 16.29  
Sea Level Pressure  
Sea Level Pressure 29.92 in    
Wind  
Wind Speed 7 mph (SW)    
Max Wind Speed 17 mph    
Max Gust Speed 20 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

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Astronomy

May. 10, 2009 Rise Set
Actual Time 6:02 AM PDT 8:09 PM PDT
Civil Twilight 5:33 AM PDT 8:38 PM PDT
Nautical Twilight 4:57 AM PDT 9:14 PM PDT
Astronomical Twilight 4:18 AM PDT 9:53 PM PDT
Moon 10:13 PM PDT (5/10) 6:40 AM PDT (5/10)
Length of Visible Light 15h 05m
Length of Day
14h 06m
Full, 97% of the Moon is Illuminated
May 10
Full
May 17
Last Quarter
May 24
New
May 30
First Quarter
Jun 7
Full

Hourly Weather History & Observations

Time (PDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 51.1 °F - 46.0 °F 83% 29.95 in 10.0 mi WSW 4.6 mph - N/A   Clear
3:54 AM 45.0 °F - 43.0 °F 93% 29.94 in 10.0 mi Calm Calm - N/A   Clear
4:54 AM 45.0 °F 43.5 °F 43.0 °F 93% 29.94 in 8.0 mi SE 3.5 mph - N/A   Clear
6:54 AM 48.9 °F - 46.9 °F 93% 29.95 in 8.0 mi SE 3.5 mph - 0.01 in   Clear
7:54 AM 54.0 °F - 48.9 °F 83% 29.96 in 10.0 mi Calm Calm - N/A   Clear
8:54 AM 57.9 °F - 50.0 °F 75% 29.97 in 10.0 mi SW 4.6 mph - N/A   Clear
9:54 AM 61.0 °F - 48.0 °F 62% 29.96 in 10.0 mi Calm Calm - N/A   Clear
10:54 AM 64.9 °F - 50.0 °F 58% 29.96 in 10.0 mi SW 3.5 mph - N/A   Clear
11:54 AM 71.1 °F - 54.0 °F 55% 29.96 in 10.0 mi SSW 8.1 mph - N/A   Clear
12:54 PM 73.0 °F - 55.0 °F 53% 29.95 in 10.0 mi SW 11.5 mph - N/A   Scattered Clouds
1:54 PM 73.9 °F - 54.0 °F 50% 29.93 in 10.0 mi SSW 11.5 mph - N/A   Clear
2:54 PM 75.9 °F - 54.0 °F 46% 29.91 in 10.0 mi SSW 13.8 mph - N/A   Clear
3:54 PM 73.9 °F - 55.0 °F 52% 29.90 in 10.0 mi SSW 15.0 mph - N/A   Clear
4:54 PM 75.9 °F - 53.1 °F 45% 29.88 in 10.0 mi SSW 13.8 mph - N/A   Clear
5:54 PM 75.9 °F - 50.0 °F 40% 29.88 in 10.0 mi West 4.6 mph - N/A   Clear
6:54 PM 70.0 °F - 50.0 °F 49% 29.87 in 10.0 mi SW 8.1 mph - N/A   Clear
7:54 PM 64.0 °F - 48.0 °F 56% 29.88 in 10.0 mi SE 9.2 mph - N/A   Clear
8:54 PM 60.1 °F - 48.0 °F 64% 29.89 in 10.0 mi SW 10.4 mph - N/A   Clear
9:54 PM 60.1 °F - 46.0 °F 60% 29.90 in 10.0 mi West 11.5 mph - N/A   Clear
10:54 PM 57.9 °F - 42.1 °F 56% 29.91 in 10.0 mi WSW 8.1 mph - N/A   Clear
11:54 PM 57.0 °F - 42.1 °F 57% 29.92 in 10.0 mi West 10.4 mph - N/A   Clear