Weather History for San Francisco, CA

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Saturday, March 12, 2011

  Actual Average Record
Temperature  
Mean Temperature 53 °F 55 °F  
Max Temperature 61 °F 62 °F 77 °F (2007)
Min Temperature 45 °F 48 °F 35 °F (1954)
Degree Days  
Heating Degree Days 12 10  
Month to date heating degree days 138 127  
Since 1 July heating degree days 1882 1933  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Growing Degree Days 3 (Base 50)    
Moisture  
Dew Point 44 °F    
Average Humidity 68    
Maximum Humidity 86    
Minimum Humidity 49    
Precipitation  
Precipitation 0.00 in 0.11 in 1.46 in (1971)
Month to date precipitation 0.66 1.37  
Year to date precipitation 6.39 9.62  
Since 1 July precipitation 15.65 17.19  
Sea Level Pressure  
Sea Level Pressure 30.18 in    
Wind  
Wind Speed 6 mph (West)    
Max Wind Speed 16 mph    
Max Gust Speed 17 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Mar. 12, 2011 Rise Set
Actual Time 6:25 AM PST 6:13 PM PST
Civil Twilight 5:59 AM PST 6:39 PM PST
Nautical Twilight 5:28 AM PST 7:10 PM PST
Astronomical Twilight 4:58 AM PST 7:40 PM PST
Moon 10:43 AM PST (3/12) 1:00 AM PST (3/12)
Length of Visible Light 12h 40m
Length of Day
11h 48m
Waxing Crescent, 48% of the Moon is Illuminated
Mar 12
Waxing Crescent
Mar 12
First Quarter
Mar 19
Full
Mar 26
Last Quarter
Apr 3
New

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 - 43.0 °F 77% 30.17 in 10.0 mi West 5.8 mph - N/A   Scattered Clouds
1:56 AM 50.0 °F - 43.0 °F 77% 30.18 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:56 AM 50.0 °F - 43.0 °F 77% 30.15 in 10.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
3:56 AM 48.0 °F - 44.1 °F 86% 30.14 in 10.0 mi South 4.6 mph - N/A   Mostly Cloudy
4:56 AM 46.9 °F - 43.0 °F 86% 30.14 in 10.0 mi SSW 3.5 mph - N/A   Mostly Cloudy
5:56 AM 46.4 °F 45.2 °F 42.8 °F 87% 30.17 in 10.0 mi West 3.5 mph - N/A   Mostly Cloudy
6:56 AM 46.0 °F 44.8 °F 42.1 °F 86% 30.19 in 10.0 mi WSW 3.5 mph - N/A   Scattered Clouds
7:56 AM 51.1 °F - 44.1 °F 77% 30.20 in 10.0 mi South 4.6 mph - N/A   Scattered Clouds
8:56 AM 54.0 °F - 45.0 °F 72% 30.20 in 10.0 mi East 4.6 mph - N/A   Scattered Clouds
9:56 AM 54.0 °F - 45.0 °F 72% 30.21 in 10.0 mi ENE 5.8 mph - N/A   Mostly Cloudy
10:56 AM 55.0 °F - 44.1 °F 67% 30.22 in 10.0 mi ENE 5.8 mph - N/A   Mostly Cloudy
11:56 AM 55.9 °F - 45.0 °F 67% 30.22 in 10.0 mi NE 5.8 mph - N/A   Scattered Clouds
12:56 PM 59.0 °F - 44.1 °F 58% 30.19 in 10.0 mi North 9.2 mph - N/A   Scattered Clouds
1:56 PM 60.1 °F - 41.0 °F 49% 30.17 in 10.0 mi West 10.4 mph - N/A   Scattered Clouds
2:56 PM 60.1 °F - 42.1 °F 51% 30.16 in 10.0 mi WNW 10.4 mph - N/A   Mostly Cloudy
3:56 PM 60.1 °F - 42.1 °F 51% 30.16 in 10.0 mi West 11.5 mph - N/A   Mostly Cloudy
4:56 PM 57.0 °F - 43.0 °F 59% 30.16 in 10.0 mi WNW 11.5 mph - N/A   Mostly Cloudy
5:56 PM 55.0 °F - 45.0 °F 69% 30.16 in 10.0 mi West 12.7 mph - N/A   Mostly Cloudy
6:56 PM 54.0 °F - 46.0 °F 75% 30.16 in 10.0 mi West 12.7 mph - N/A   Scattered Clouds
7:56 PM 53.1 °F - 46.0 °F 77% 30.17 in 10.0 mi WNW 9.2 mph - N/A   Partly Cloudy
8:56 PM 53.1 °F - 46.0 °F 77% 30.17 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
9:56 PM 53.1 °F - 46.0 °F 77% 30.18 in 10.0 mi Calm Calm - N/A   Partly Cloudy
10:56 PM 53.1 °F - 45.0 °F 74% 30.18 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
11:56 PM 53.1 °F - 44.1 °F 71% 30.17 in 10.0 mi SSE 3.5 mph - N/A   Mostly Cloudy