Weather History for San Francisco, CA

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Wednesday, December 12, 2012

  Actual Average Record
Temperature  
Mean Temperature 51 °F 51 °F  
Max Temperature 55 °F 57 °F 75 °F (1958)
Min Temperature 46 °F 45 °F 29 °F (1972)
Degree Days  
Heating Degree Days 14 14  
Month to date heating degree days 111 162  
Since 1 July heating degree days 706 726  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 86 164  
Growing Degree Days 1 (Base 50)    
Moisture  
Dew Point 42 °F    
Average Humidity 72    
Maximum Humidity 89    
Minimum Humidity 54    
Precipitation  
Precipitation 0.10 in 0.12 in 1.16 in (2006)
Month to date precipitation 2.34 1.37  
Year to date precipitation 17.56 17.99  
Since 1 July precipitation 7.10 4.91  
Sea Level Pressure  
Sea Level Pressure 29.88 in    
Wind  
Wind Speed 8 mph (West)    
Max Wind Speed 18 mph    
Max Gust Speed 24 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 12, 2012 Rise Set
Actual Time 7:15 AM PST 4:51 PM PST
Civil Twilight 6:46 AM PST 5:20 PM PST
Nautical Twilight 6:13 AM PST 5:53 PM PST
Astronomical Twilight 5:41 AM PST 6:25 PM PST
Moon 6:26 AM PST (12/12) 4:33 PM PST (12/12)
Length of Visible Light 10h 34m
Length of Day
9h 35m
Waning Crescent, 0% of the Moon is Illuminated
Dec 12
Waning Crescent
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 53.1 °F - 48.9 °F 86% 29.87 in 8.0 mi SSE 8.1 mph - 0.03 in Rain Light Rain
1:36 AM 51.8 °F - 48.2 °F 88% 29.85 in 5.0 mi SSE 8.1 mph - N/A Rain Light Rain
1:56 AM 52.0 °F - 48.0 °F 86% 29.85 in 7.0 mi SE 10.4 mph - 0.02 in Rain Light Rain
2:56 AM 53.1 °F - 46.0 °F 77% 29.85 in 10.0 mi West 13.8 mph 17.3 mph 0.01 in   Overcast
3:41 AM 51.8 °F - 46.4 °F 82% 29.85 in 10.0 mi West 5.8 mph - 0.00 in Rain Light Rain
3:56 AM 52.0 °F - 45.0 °F 77% 29.85 in 10.0 mi West 5.8 mph - 0.00 in   Overcast
4:56 AM 51.1 °F - 44.1 °F 77% 29.85 in 10.0 mi WNW 6.9 mph - 0.00 in Rain Light Rain
5:31 AM 50.0 °F - 44.6 °F 82% 29.86 in 10.0 mi WNW 8.1 mph - 0.04 in Rain Light Rain
5:56 AM 50.0 °F - 44.1 °F 80% 29.86 in 10.0 mi West 3.5 mph - 0.04 in   Mostly Cloudy
6:56 AM 50.0 °F - 42.1 °F 74% 29.87 in 10.0 mi WNW 5.8 mph - 0.00 in Rain Light Rain
7:56 AM 50.0 °F - 43.0 °F 77% 29.88 in 10.0 mi West 3.5 mph - 0.00 in   Mostly Cloudy
8:56 AM 51.1 °F - 42.1 °F 71% 29.90 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
9:56 AM 50.0 °F - 41.0 °F 71% 29.91 in 10.0 mi WNW 8.1 mph 24.2 mph 0.00 in Rain Light Rain
10:56 AM 54.0 °F - 41.0 °F 62% 29.91 in 10.0 mi West 10.4 mph - 0.00 in   Partly Cloudy
11:56 AM 55.0 °F - 41.0 °F 59% 29.90 in 10.0 mi West 13.8 mph - N/A   Mostly Cloudy
12:56 PM 53.6 °F - 39.2 °F 58% 29.88 in 10.0 mi WSW 12.7 mph - N/A   Mostly Cloudy
1:56 PM 54.0 °F - 37.0 °F 53% 29.87 in 10.0 mi West 15.0 mph - N/A   Scattered Clouds
2:56 PM 54.0 °F - 39.0 °F 57% 29.87 in 10.0 mi West 12.7 mph - N/A   Mostly Cloudy
3:56 PM 52.0 °F - 39.0 °F 61% 29.87 in 10.0 mi West 12.7 mph - N/A   Scattered Clouds
4:56 PM 51.1 °F - 37.9 °F 61% 29.87 in 10.0 mi West 11.5 mph - N/A   Scattered Clouds
5:56 PM 50.0 °F - 39.0 °F 66% 29.87 in 10.0 mi West 5.8 mph - N/A   Scattered Clouds
6:56 PM 51.1 °F - 39.9 °F 66% 29.88 in 10.0 mi West 9.2 mph - N/A   Scattered Clouds
7:56 PM 50.0 °F - 39.9 °F 68% 29.88 in 10.0 mi Calm Calm - N/A   Scattered Clouds
8:56 PM 48.9 °F - 39.9 °F 71% 29.89 in 10.0 mi WNW 8.1 mph - N/A   Partly Cloudy
9:56 PM 50.0 °F - 41.0 °F 71% 29.89 in 10.0 mi NW 5.8 mph - N/A   Partly Cloudy
10:56 PM 48.0 °F - 39.0 °F 71% 29.90 in 10.0 mi West 4.6 mph - N/A   Partly Cloudy
11:56 PM 46.0 °F 44.8 °F 37.9 °F 73% 29.91 in 10.0 mi WSW 3.5 mph - N/A   Partly Cloudy