Weather History for San Francisco, CA

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Sunday, February 17, 2013

  Actual Average Record
Temperature  
Mean Temperature 54 °F 53 °F  
Max Temperature 59 °F 60 °F 73 °F (2007)
Min Temperature 48 °F 47 °F 35 °F (1956)
Degree Days  
Heating Degree Days 11 12  
Month to date heating degree days 230 214  
Since 1 July heating degree days 1725 1681  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Growing Degree Days 4 (Base 50)    
Moisture  
Dew Point 43 °F    
Average Humidity 72    
Maximum Humidity 86    
Minimum Humidity 57    
Precipitation  
Precipitation 0.00 in 0.15 in 1.83 in (1986)
Month to date precipitation 0.25 2.50  
Year to date precipitation 0.45 6.69  
Since 1 July precipitation 11.45 14.26  
Sea Level Pressure  
Sea Level Pressure 30.03 in    
Wind  
Wind Speed 11 mph (West)    
Max Wind Speed 22 mph    
Max Gust Speed 24 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Feb. 17, 2013 Rise Set
Actual Time 6:56 AM PST 5:51 PM PST
Civil Twilight 6:29 AM PST 6:17 PM PST
Nautical Twilight 5:58 AM PST 6:48 PM PST
Astronomical Twilight 5:28 AM PST 7:18 PM PST
Moon 11:02 AM PST (2/17) 12:43 AM PST (2/17)
Length of Visible Light 11h 48m
Length of Day
10h 55m
Waxing Crescent, 50% of the Moon is Illuminated
Feb 17
Waxing Crescent
Feb 17
First Quarter
Feb 25
Full
Mar 4
Last Quarter
Mar 11
New

Hourly Weather History & Observations

Time (PST) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 48.9 °F 45.0 °F 86% 30.08 in 10.0 mi West 12.7 mph - N/A   Mostly Cloudy
1:31 AM 48.2 °F 44.6 °F 87% 30.07 in 10.0 mi West 5.8 mph - N/A   Partly Cloudy
1:56 AM 48.9 °F 44.1 °F 83% 30.06 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
2:56 AM 48.9 °F 45.0 °F 86% 30.05 in 10.0 mi West 8.1 mph - N/A   Partly Cloudy
3:56 AM 48.9 °F 44.1 °F 83% 30.04 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy
4:56 AM 48.9 °F 43.0 °F 80% 30.04 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy
5:56 AM 48.9 °F 43.0 °F 80% 30.04 in 10.0 mi West 12.7 mph - N/A   Scattered Clouds
6:56 AM 48.0 °F 42.1 °F 80% 30.05 in 10.0 mi West 11.5 mph - N/A   Partly Cloudy
7:56 AM 48.9 °F 42.1 °F 77% 30.06 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
8:56 AM 51.1 °F 42.1 °F 71% 30.06 in 10.0 mi Calm Calm - N/A   Partly Cloudy
9:56 AM 53.1 °F 43.0 °F 69% 30.06 in 10.0 mi ENE 4.6 mph - N/A   Partly Cloudy
10:56 AM 53.1 °F 46.0 °F 77% 30.06 in 10.0 mi East 6.9 mph - N/A   Clear
11:56 AM 54.0 °F 45.0 °F 72% 30.06 in 10.0 mi ENE 4.6 mph - N/A   Clear
12:56 PM 55.9 °F 46.0 °F 69% 30.03 in 10.0 mi ENE 3.5 mph - N/A   Clear
1:56 PM 57.9 °F 42.1 °F 56% 30.01 in 10.0 mi WNW 15.0 mph - N/A   Partly Cloudy
2:56 PM 57.0 °F 42.1 °F 57% 30.01 in 10.0 mi WNW 17.3 mph - N/A   Clear
3:56 PM 55.0 °F 41.0 °F 59% 30.00 in 10.0 mi West 18.4 mph - N/A   Clear
4:56 PM 53.1 °F 42.1 °F 66% 29.99 in 10.0 mi WNW 17.3 mph - N/A   Partly Cloudy
5:56 PM 51.1 °F 43.0 °F 74% 29.99 in 10.0 mi West 17.3 mph - N/A   Partly Cloudy
6:56 PM 50.0 °F 42.1 °F 74% 30.00 in 10.0 mi West 13.8 mph - N/A   Clear
7:56 PM 50.0 °F 43.0 °F 77% 30.00 in 10.0 mi West 17.3 mph - N/A   Clear
8:56 PM 48.9 °F 43.0 °F 80% 30.01 in 10.0 mi West 15.0 mph - N/A   Clear
9:56 PM 48.9 °F 43.0 °F 80% 30.02 in 10.0 mi West 12.7 mph - N/A   Partly Cloudy
10:56 PM 48.0 °F 43.0 °F 83% 30.03 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
11:56 PM 48.9 °F 43.0 °F 80% 30.03 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy