Weather History for San Francisco, CA

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Wednesday, December 26, 2012

  Actual Average Record
Temperature  
Mean Temperature 52 °F 50 °F  
Max Temperature 55 °F 56 °F 72 °F (1967)
Min Temperature 48 °F 44 °F 32 °F (1954)
Degree Days  
Heating Degree Days 13 15  
Month to date heating degree days 313 370  
Since 1 July heating degree days 908 934  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 86 164  
Moisture  
Dew Point 43 °F    
Average Humidity 73    
Maximum Humidity 80    
Minimum Humidity 66    
Precipitation  
Precipitation 0.20 in 0.14 in 1.46 in (1948)
Month to date precipitation 5.96 3.33  
Year to date precipitation 21.18 19.95  
Since 1 July precipitation 10.72 6.87  
Sea Level Pressure  
Sea Level Pressure 30.00 in    
Wind  
Wind Speed 14 mph (WNW)    
Max Wind Speed 26 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, 2012 Rise Set
Actual Time 7:23 AM PST 4:57 PM PST
Civil Twilight 6:53 AM PST 5:27 PM PST
Nautical Twilight 6:20 AM PST 5:59 PM PST
Astronomical Twilight 5:49 AM PST 6:31 PM PST
Moon 3:55 PM PST (12/26) 5:51 AM PST (12/26)
Length of Visible Light 10h 33m
Length of Day
9h 34m
Waxing Gibbous, 98% of the Moon is Illuminated
Dec 26
Waxing Gibbous
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter

Hourly Weather History & Observations

Time (PST) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 51.8 °F 44.6 °F 76% 29.89 in 10.0 mi West 11.5 mph - N/A Rain Light Rain
1:56 AM 51.1 °F 43.0 °F 74% 29.90 in 10.0 mi West 13.8 mph - 0.00 in   Scattered Clouds
2:56 AM 51.8 °F 42.8 °F 71% 29.90 in 10.0 mi WNW 11.5 mph - N/A   Mostly Cloudy
3:56 AM 50.0 °F 42.8 °F 76% 29.90 in 10.0 mi West 11.5 mph - N/A   Mostly Cloudy
4:56 AM 51.1 °F 41.0 °F 68% 29.90 in 10.0 mi West 12.7 mph - N/A   Mostly Cloudy
5:56 AM 48.9 °F 43.0 °F 80% 29.92 in 9.0 mi WNW 5.8 mph - 0.03 in Rain Light Rain
6:56 AM 48.9 °F 42.1 °F 77% 29.94 in 10.0 mi West 4.6 mph - 0.03 in   Scattered Clouds
7:56 AM 50.0 °F 43.0 °F 77% 29.96 in 10.0 mi West 6.9 mph - N/A   Mostly Cloudy
8:13 AM 51.8 °F 42.8 °F 71% 29.96 in 4.0 mi WNW 6.9 mph - 0.00 in Rain Light Rain
8:56 AM 50.0 °F 44.1 °F 80% 29.98 in 9.0 mi West 5.8 mph - 0.09 in   Mostly Cloudy
9:56 AM 51.1 °F 44.1 °F 77% 30.01 in 8.0 mi WNW 16.1 mph - 0.01 in Rain Light Rain
10:56 AM 51.1 °F 46.0 °F 83% 30.01 in 3.0 mi WNW 16.1 mph 28.8 mph 0.01 in Rain Light Rain
11:02 AM 50.0 °F 46.4 °F 87% 30.01 in 8.0 mi WNW 9.2 mph - 0.00 in Rain Light Rain
11:56 AM 51.1 °F 46.9 °F 86% 30.00 in 9.0 mi West 15.0 mph - 0.01 in Rain Light Rain
12:56 PM 54.0 °F 48.9 °F 83% 30.00 in 10.0 mi WNW 18.4 mph 28.8 mph 0.00 in   Mostly Cloudy
1:56 PM 54.0 °F 43.0 °F 66% 29.99 in 10.0 mi West 25.3 mph 33.4 mph N/A   Mostly Cloudy
2:56 PM 54.0 °F 43.0 °F 66% 30.00 in 10.0 mi West 23.0 mph 34.5 mph N/A   Mostly Cloudy
3:56 PM 53.1 °F 42.1 °F 66% 30.03 in 10.0 mi WNW 16.1 mph 27.6 mph N/A   Mostly Cloudy
4:56 PM 52.0 °F 42.1 °F 69% 30.04 in 10.0 mi WNW 18.4 mph 24.2 mph N/A   Mostly Cloudy
5:56 PM 52.0 °F 42.1 °F 69% 30.05 in 10.0 mi WNW 23.0 mph 29.9 mph N/A   Scattered Clouds
6:56 PM 51.1 °F 43.0 °F 74% 30.05 in 10.0 mi West 13.8 mph - N/A   Scattered Clouds
7:56 PM 51.1 °F 42.1 °F 71% 30.06 in 10.0 mi WNW 16.1 mph 23.0 mph N/A   Mostly Cloudy
8:56 PM 50.0 °F 41.0 °F 71% 30.07 in 10.0 mi WNW 15.0 mph 21.9 mph N/A   Scattered Clouds
9:56 PM 50.0 °F 39.9 °F 68% 30.09 in 10.0 mi WNW 9.2 mph - N/A   Scattered Clouds
10:56 PM 50.0 °F 41.0 °F 71% 30.11 in 10.0 mi WNW 9.2 mph - N/A   Scattered Clouds
11:56 PM 48.9 °F 39.9 °F 71% 30.12 in 10.0 mi West 16.1 mph - N/A   Scattered Clouds