Weather History for San Francisco, CA

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Friday, December 7, 2012

  Actual Average Record
Temperature  
Mean Temperature 53 °F 52 °F  
Max Temperature 60 °F 58 °F 69 °F (1979)
Min Temperature 46 °F 45 °F 33 °F (1960)
Degree Days  
Heating Degree Days 12 14  
Month to date heating degree days 57 92  
Since 1 July heating degree days 652 656  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 86 164  
Growing Degree Days 3 (Base 50)    
Moisture  
Dew Point 46 °F    
Average Humidity 75    
Maximum Humidity 86    
Minimum Humidity 64    
Precipitation  
Precipitation 0.00 in 0.13 in 1.86 in (1997)
Month to date precipitation 2.24 0.78  
Year to date precipitation 17.46 17.40  
Since 1 July precipitation 7.00 4.32  
Sea Level Pressure  
Sea Level Pressure 30.11 in    
Wind  
Wind Speed 5 mph (West)    
Max Wind Speed 15 mph    
Max Gust Speed 16 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 07, 2012 Rise Set
Actual Time 7:11 AM PST 4:50 PM PST
Civil Twilight 6:42 AM PST 5:19 PM PST
Nautical Twilight 6:09 AM PST 5:52 PM PST
Astronomical Twilight 5:38 AM PST 6:24 PM PST
Moon 12:42 AM PST (12/7) 12:45 PM PST (12/7)
Length of Visible Light 10h 37m
Length of Day
9h 39m
Last Quarter, 37% of the Moon is Illuminated
Dec 7
Last Quarter
Dec 13
New
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 50.0 °F - 45.0 °F 83% 30.13 in 10.0 mi WSW 3.5 mph - N/A   Partly Cloudy
1:56 AM 48.9 °F - 44.1 °F 83% 30.13 in 10.0 mi SSW 3.5 mph - N/A   Partly Cloudy
2:56 AM 46.9 °F - 43.0 °F 86% 30.13 in 10.0 mi SSW 3.5 mph - N/A   Clear
3:56 AM 46.9 °F - 43.0 °F 86% 30.12 in 10.0 mi SSW 3.5 mph - N/A   Clear
4:56 AM 46.9 °F - 43.0 °F 86% 30.12 in 10.0 mi Calm Calm - N/A   Clear
5:56 AM 46.0 °F - 42.1 °F 86% 30.12 in 10.0 mi Calm Calm - N/A   Clear
6:56 AM 46.0 °F 43.9 °F 42.1 °F 86% 30.12 in 10.0 mi West 4.6 mph - N/A   Scattered Clouds
7:56 AM 48.0 °F - 44.1 °F 86% 30.14 in 10.0 mi West 3.5 mph - N/A   Scattered Clouds
8:56 AM 53.1 °F - 46.9 °F 80% 30.14 in 10.0 mi Calm Calm - N/A   Scattered Clouds
9:56 AM 55.0 °F - 48.0 °F 77% 30.16 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
10:56 AM 55.9 °F - 48.0 °F 75% 30.15 in 10.0 mi Calm Calm - N/A   Scattered Clouds
11:56 AM 57.0 °F - 48.0 °F 72% 30.12 in 10.0 mi NE 4.6 mph - N/A   Partly Cloudy
12:56 PM 57.9 °F - 50.0 °F 75% 30.11 in 10.0 mi NNE 6.9 mph - N/A   Partly Cloudy
1:56 PM 57.9 °F - 48.0 °F 70% 30.09 in 10.0 mi NNE 3.5 mph - N/A   Partly Cloudy
2:56 PM 60.1 °F - 48.9 °F 67% 30.08 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:56 PM 59.0 °F - 48.0 °F 67% 30.08 in 10.0 mi WNW 11.5 mph - N/A   Scattered Clouds
4:56 PM 55.0 °F - 46.0 °F 72% 30.08 in 10.0 mi West 12.7 mph - N/A   Mostly Cloudy
5:56 PM 54.0 °F - 45.0 °F 72% 30.08 in 10.0 mi West 11.5 mph - N/A   Scattered Clouds
6:56 PM 53.1 °F - 46.0 °F 77% 30.08 in 10.0 mi West 12.7 mph - N/A   Partly Cloudy
7:56 PM 53.1 °F - 46.9 °F 80% 30.08 in 10.0 mi West 11.5 mph - N/A   Partly Cloudy
8:56 PM 52.0 °F - 46.9 °F 83% 30.09 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
9:56 PM 52.0 °F - 46.9 °F 83% 30.09 in 10.0 mi West 8.1 mph - N/A   Partly Cloudy
10:56 PM 53.1 °F - 46.9 °F 80% 30.09 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy
11:56 PM 52.0 °F - 46.0 °F 80% 30.09 in 10.0 mi West 5.8 mph - N/A   Clear