Weather History for San Francisco, CA

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Friday, February 1, 2008

  Actual Average Record
Temperature  
Mean Temperature 46 °F 52 °F  
Max Temperature 52 °F 58 °F 70 °F (1976)
Min Temperature 41 °F 45 °F 30 °F (1950)
Degree Days  
Heating Degree Days 18 13  
Month to date heating degree days 13  
Since 1 July heating degree days 1480  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 0  
Moisture  
Dew Point 39 °F    
Average Humidity 74    
Maximum Humidity 92    
Minimum Humidity 61    
Precipitation  
Precipitation 0.00 in 0.15 in 1.06 in (1960)
Month to date precipitation 0.15  
Year to date precipitation 4.34  
Since 1 July precipitation 11.91  
Sea Level Pressure  
Sea Level Pressure 30.25 in    
Wind  
Wind Speed 6 mph (WNW)    
Max Wind Speed 14 mph    
Max Gust Speed -    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Feb. 01, 2008 Rise Set
Actual Time 7:13 AM PST 5:32 PM PST
Civil Twilight 6:45 AM PST 6:00 PM PST
Nautical Twilight 6:14 AM PST 6:31 PM PST
Astronomical Twilight 5:43 AM PST 7:02 PM PST
Moon 3:10 AM PST (2/1) 12:24 PM PST (2/1)
Length of Visible Light 11h 14m
Length of Day
10h 19m
Waning Crescent, 26% of the Moon is Illuminated
Feb 1
Waning Crescent
Feb 6
New
Feb 13
First Quarter
Feb 20
Full
Feb 28
Last Quarter

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:41 AM 46.4 °F 43.5 °F 41.0 °F 81% 30.24 in 10.0 mi WNW 5.8 mph - N/A   Partly Cloudy
12:56 AM 46.9 °F - 41.0 °F 80% 30.24 in 10.0 mi WNW 6.9 mph - N/A   Partly Cloudy
1:56 AM 45.0 °F 43.5 °F 39.9 °F 82% 30.24 in 10.0 mi WSW 3.5 mph - N/A   Partly Cloudy
2:56 AM 43.0 °F - 39.0 °F 86% 30.25 in 10.0 mi Calm Calm - N/A   Clear
3:56 AM 42.8 °F 39.3 °F 37.4 °F 81% 30.24 in 10.0 mi WSW 5.8 mph - N/A   Clear
4:56 AM 42.1 °F 38.4 °F 37.9 °F 85% 30.24 in 10.0 mi WNW 5.8 mph - N/A   Clear
5:56 AM 41.0 °F 38.0 °F 37.0 °F 86% 30.25 in 10.0 mi West 4.6 mph - N/A   Clear
6:56 AM 43.0 °F - 37.9 °F 82% 30.27 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:56 AM 42.1 °F - 39.9 °F 92% 30.27 in 10.0 mi Calm Calm - N/A   Partly Cloudy
8:56 AM 46.9 °F - 39.0 °F 74% 30.29 in 10.0 mi Calm Calm - N/A   Partly Cloudy
9:56 AM 48.9 °F - 39.9 °F 71% 30.29 in 10.0 mi NNW 6.9 mph - N/A   Mostly Cloudy
10:56 AM 50.0 °F - 41.0 °F 71% 30.30 in 10.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
11:56 AM 50.0 °F - 41.0 °F 71% 30.29 in 10.0 mi NNE 5.8 mph - N/A   Mostly Cloudy
12:56 PM 52.0 °F - 39.0 °F 61% 30.27 in 10.0 mi NW 12.7 mph - N/A   Mostly Cloudy
1:56 PM 50.0 °F - 39.0 °F 66% 30.25 in 10.0 mi West 11.5 mph - N/A   Mostly Cloudy
2:56 PM 50.0 °F - 39.9 °F 68% 30.24 in 10.0 mi WNW 10.4 mph - N/A   Overcast
3:56 PM 51.1 °F - 37.9 °F 61% 30.22 in 10.0 mi NW 9.2 mph - N/A   Mostly Cloudy
4:56 PM 48.9 °F - 37.9 °F 66% 30.22 in 10.0 mi West 13.8 mph - N/A   Mostly Cloudy
5:56 PM 46.9 °F - 37.9 °F 71% 30.21 in 10.0 mi West 10.4 mph - N/A   Scattered Clouds
6:56 PM 46.9 °F - 37.9 °F 71% 30.23 in 10.0 mi West 13.8 mph - N/A   Scattered Clouds
7:56 PM 46.0 °F 39.9 °F 37.0 °F 71% 30.24 in 10.0 mi West 13.8 mph - N/A   Partly Cloudy
8:56 PM 46.9 °F - 36.0 °F 66% 30.24 in 10.0 mi WNW 11.5 mph - N/A   Partly Cloudy
9:56 PM 46.9 °F - 37.0 °F 68% 30.25 in 10.0 mi NW 8.1 mph - N/A   Scattered Clouds
10:56 PM 46.0 °F 42.5 °F 37.9 °F 73% 30.26 in 10.0 mi NW 6.9 mph - N/A   Partly Cloudy
11:56 PM 45.0 °F 41.2 °F 37.9 °F 76% 30.25 in 10.0 mi WNW 6.9 mph - N/A   Partly Cloudy