Weather History for KSFO - December, 2007

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Wednesday, December 26, 2007

  Actual Average Record
Temperature  
Mean Temperature 49 °F 50 °F  
Max Temperature 53 °F 56 °F 72 °F (1967)
Min Temperature 44 °F 44 °F 32 °F (1954)
Degree Days  
Heating Degree Days 16 15  
Month to date heating degree days 383 370  
Since 1 July heating degree days 943 934  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 126 164  
Moisture  
Dew Point 35 °F    
Average Humidity 66    
Maximum Humidity 83    
Minimum Humidity 49    
Precipitation  
Precipitation 0.01 in 0.14 in 1.46 in (1948)
Month to date precipitation 2.30 3.33  
Year to date precipitation 11.30 19.95  
Since 1 July precipitation 5.01 6.87  
Snow  
Snow 0.00 in - 0.00 in ()
Month to date snowfall 0.0  
Since 1 July snowfall 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.32 in    
Wind  
Wind Speed 13 mph (NW)    
Max Wind Speed 28 mph    
Max Gust Speed 33 mph    
Visibility 9 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 26, 2007 Rise Set
Actual Time 7:22 AM PST 4:57 PM PST
Civil Twilight 6:53 AM PST 5:26 PM PST
Nautical Twilight 6:20 AM PST 5:59 PM PST
Astronomical Twilight 5:48 AM PST 6:31 PM PST
Moon 8:10 PM PST (12/26) 9:45 AM PST (12/26)
Length of Visible Light 10h 33m
Length of Day
9h 34m
Waning Gibbous, 90% of the Moon is Illuminated
Dec 26
Waning Gibbous
Dec 30
Last Quarter
Jan 8
New
Jan 15
First Quarter
Jan 22
Full

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:03 AM 48.2 °F - 44.6 °F 87% 30.34 in 9.0 mi West 12.7 mph - N/A   Overcast
12:56 AM 48.0 °F - 46.0 °F 93% 30.33 in 2.5 mi WNW 13.8 mph - 0.01 in Rain Light Rain
1:04 AM 48.2 °F - 46.4 °F 93% 30.33 in 4.0 mi WNW 16.1 mph - 0.00 in Rain Light Rain
1:56 AM 46.9 °F - 44.1 °F 90% 30.33 in 10.0 mi WNW 12.7 mph - 0.00 in   Scattered Clouds
2:56 AM 46.0 °F 42.5 °F 41.0 °F 83% 30.32 in 10.0 mi WNW 6.9 mph - N/A   Partly Cloudy
3:56 AM 46.0 °F 41.0 °F 39.0 °F 76% 30.32 in 10.0 mi WNW 10.4 mph - N/A   Mostly Cloudy
4:56 AM 44.1 °F 39.0 °F 37.9 °F 79% 30.32 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
5:56 AM 45.0 °F 40.1 °F 35.1 °F 68% 30.33 in 10.0 mi NW 9.2 mph - N/A   Clear
6:56 AM 45.0 °F 40.6 °F 34.0 °F 65% 30.34 in 10.0 mi WNW 8.1 mph - N/A   Clear
7:56 AM 46.0 °F 40.2 °F 33.1 °F 61% 30.35 in 10.0 mi WNW 12.7 mph - N/A   Clear
8:56 AM 46.9 °F - 35.1 °F 63% 30.36 in 10.0 mi NW 11.5 mph - N/A   Clear
9:56 AM 48.9 °F - 33.1 °F 54% 30.36 in 10.0 mi NW 15.0 mph - N/A   Clear
10:56 AM 48.9 °F - 36.0 °F 61% 30.36 in 10.0 mi North 10.4 mph - N/A   Clear
11:56 AM 51.1 °F - 36.0 °F 56% 30.34 in 10.0 mi WNW 9.2 mph - N/A   Partly Cloudy
12:56 PM 52.0 °F - 33.1 °F 49% 30.31 in 10.0 mi WNW 20.7 mph - N/A   Scattered Clouds
1:56 PM 51.1 °F - 33.1 °F 50% 30.28 in 10.0 mi WNW 23.0 mph 28.8 mph N/A   Scattered Clouds
2:56 PM 50.0 °F - 33.1 °F 52% 30.28 in 10.0 mi WNW 20.7 mph 25.3 mph N/A   Partly Cloudy
3:56 PM 48.9 °F - 33.1 °F 54% 30.27 in 10.0 mi WNW 20.7 mph - N/A   Partly Cloudy
4:56 PM 48.0 °F - 33.1 °F 56% 30.26 in 10.0 mi WNW 15.0 mph 23.0 mph N/A   Partly Cloudy
5:56 PM 48.0 °F - 30.9 °F 52% 30.27 in 10.0 mi WNW 18.4 mph - N/A   Partly Cloudy
6:56 PM 46.9 °F - 30.0 °F 52% 30.28 in 10.0 mi NW 11.5 mph 20.7 mph N/A   Clear
7:56 PM 46.0 °F 41.4 °F 33.1 °F 61% 30.30 in 10.0 mi WNW 9.2 mph - N/A   Clear
8:56 PM 45.0 °F 39.7 °F 30.0 °F 56% 30.31 in 10.0 mi NNW 10.4 mph - N/A   Clear
9:56 PM 45.0 °F 38.9 °F 27.0 °F 49% 30.31 in 10.0 mi NNW 12.7 mph - N/A   Clear
10:56 PM 45.0 °F 38.9 °F 26.1 °F 48% 30.31 in 10.0 mi NNW 12.7 mph - N/A   Clear
11:56 PM 45.0 °F 39.3 °F 27.0 °F 49% 30.30 in 10.0 mi NNW 11.5 mph - N/A   Clear