San Francisco, CA

8:25 PM PST on December 03, 2016 (GMT -0800)
San Francisco International

Weather History for KSFO - December, 2011

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Monday, December 12, 2011

  Actual Average Record
Temperature  
Mean Temperature 47 °F 51 °F  
Max Temperature 51 °F 57 °F 75 °F (1958)
Min Temperature 43 °F 45 °F 29 °F (1972)
Degree Days  
Heating Degree Days 18 14  
Month to date heating degree days 169 162  
Since 1 July heating degree days 794 726  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 115 164  
Moisture  
Dew Point 41 °F    
Average Humidity 75    
Maximum Humidity 86    
Minimum Humidity 63    
Precipitation  
Precipitation 0.06 in 0.12 in 1.16 in (2006)
Month to date precipitation 0.07 1.37  
Year to date precipitation 16.53 17.99  
Since 1 July precipitation 2.81  
Sea Level Pressure  
Sea Level Pressure 29.80 in    
Wind  
Wind Speed 4 mph (ENE)    
Max Wind Speed 14 mph    
Max Gust Speed 15 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Daily Weather History Graph

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Date:

Astronomy

Dec. 12, 2011 Rise Set
Actual Time 7:14 AM PST 4:51 PM PST
Civil Twilight 6:45 AM PST 5:20 PM PST
Nautical Twilight 6:12 AM PST 5:53 PM PST
Astronomical Twilight 5:41 AM PST 6:25 PM PST
Moon 7:06 PM PST (12/12) 8:51 AM PST (12/12)
Length of Visible Light 10h 34m
Length of Day
9h 36m
Waning Gibbous, 95% of the Moon is Illuminated
Dec 12
Waning Gibbous
Dec 17
Last Quarter
Dec 24
New
Dec 31
First Quarter
Jan 8
Full

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 46.9 °F - 43.0 °F 86% 29.83 in 10.0 mi Calm Calm - 0.01 in Rain Light Rain
1:56 AM 46.9 °F - 43.0 °F 86% 29.81 in 10.0 mi Calm Calm - 0.02 in Rain Light Rain
2:56 AM 46.4 °F 44.3 °F 42.8 °F 87% 29.80 in 10.0 mi SSW 4.6 mph - N/A   Overcast
3:56 AM 46.0 °F - 43.0 °F 89% 29.78 in 10.0 mi Calm Calm - N/A   Overcast
4:29 AM 46.4 °F - 42.8 °F 87% 29.77 in 10.0 mi Calm Calm - 0.01 in Rain Light Rain
4:56 AM 46.0 °F - 43.0 °F 89% 29.78 in 10.0 mi Calm Calm - 0.02 in   Overcast
5:56 AM 46.9 °F - 42.1 °F 83% 29.77 in 10.0 mi Calm Calm - 0.00 in Rain Light Rain
6:24 AM 46.4 °F - 42.8 °F 87% 29.77 in 10.0 mi Calm Calm - 0.00 in   Overcast
6:56 AM 48.0 °F - 42.1 °F 80% 29.78 in 10.0 mi NNE 5.8 mph - 0.00 in Rain Light Rain
7:56 AM 46.9 °F - 41.0 °F 80% 29.78 in 10.0 mi ENE 11.5 mph - 0.00 in   Overcast
8:56 AM 46.9 °F - 41.0 °F 80% 29.78 in 9.0 mi NE 11.5 mph - 0.01 in   Mostly Cloudy
9:56 AM 48.0 °F - 39.9 °F 74% 29.79 in 9.0 mi NE 10.4 mph - N/A   Mostly Cloudy
10:56 AM 48.0 °F - 39.9 °F 74% 29.79 in 9.0 mi NE 11.5 mph - N/A   Overcast
11:56 AM 48.9 °F - 41.0 °F 74% 29.78 in 9.0 mi NNE 6.9 mph - N/A   Overcast
12:56 PM 50.0 °F - 41.0 °F 71% 29.76 in 10.0 mi East 9.2 mph - 0.00 in   Overcast
1:56 PM 50.0 °F - 41.0 °F 71% 29.75 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:56 PM 50.0 °F - 39.9 °F 68% 29.76 in 10.0 mi South 3.5 mph - N/A   Mostly Cloudy
3:56 PM 51.1 °F - 39.9 °F 66% 29.77 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:56 PM 51.1 °F - 42.1 °F 71% 29.78 in 9.0 mi ENE 4.6 mph - N/A   Scattered Clouds
5:56 PM 48.9 °F - 39.9 °F 71% 29.80 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:56 PM 46.4 °F 45.2 °F 39.2 °F 76% 29.81 in 10.0 mi South 3.5 mph - N/A   Scattered Clouds
7:56 PM 48.0 °F - 39.9 °F 74% 29.83 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
8:56 PM 46.0 °F 44.8 °F 39.0 °F 76% 29.84 in 10.0 mi West 3.5 mph - N/A   Scattered Clouds
9:56 PM 44.1 °F 42.5 °F 39.0 °F 82% 29.86 in 10.0 mi South 3.5 mph - N/A   Partly Cloudy
10:56 PM 44.1 °F - 37.9 °F 79% 29.88 in 10.0 mi Calm Calm - N/A   Clear
11:56 PM 44.1 °F - 39.0 °F 82% 29.89 in 10.0 mi Calm Calm - N/A   Partly Cloudy