Weather History for KSFO - February, 2012

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Wednesday, February 1, 2012

  Actual Average Record
Temperature  
Mean Temperature 51 °F 52 °F  
Max Temperature 57 °F 58 °F 70 °F (1976)
Min Temperature 45 °F 45 °F 30 °F (1950)
Degree Days  
Heating Degree Days 14 13  
Month to date heating degree days 14 13  
Since 1 July heating degree days 1562 1480  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 46 °F    
Average Humidity 80    
Maximum Humidity 93    
Minimum Humidity 67    
Precipitation  
Precipitation 0.01 in 0.15 in 1.06 in (1960)
Month to date precipitation 0.01 0.15  
Year to date precipitation 2.17 4.34  
Since 1 July precipitation 5.04 11.91  
Sea Level Pressure  
Sea Level Pressure 30.25 in    
Wind  
Wind Speed 8 mph (WSW)    
Max Wind Speed 17 mph    
Max Gust Speed 23 mph    
Visibility 9 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Feb. 01, 2012 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 12:06 PM PST (2/1) 2:02 AM PST (2/1)
Length of Visible Light 11h 14m
Length of Day
10h 19m
Waxing Gibbous, 65% of the Moon is Illuminated
Feb 1
Waxing Gibbous
Feb 7
Full
Feb 14
Last Quarter
Feb 21
New
Feb 29
First Quarter

Hourly Weather History & Observations

Time (PST) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 48.0 °F 41.0 °F 77% 30.23 in 10.0 mi West 5.8 mph - N/A   Overcast
1:56 AM 48.9 °F 43.0 °F 80% 30.22 in 10.0 mi South 5.8 mph - N/A   Overcast
2:56 AM 48.9 °F 43.0 °F 80% 30.21 in 10.0 mi SE 8.1 mph - N/A   Mostly Cloudy
3:56 AM 50.0 °F 45.0 °F 83% 30.22 in 7.0 mi ESE 6.9 mph - N/A   Overcast
4:56 AM 48.9 °F 43.0 °F 80% 30.22 in 10.0 mi ESE 10.4 mph - N/A   Overcast
5:56 AM 48.0 °F 45.0 °F 89% 30.23 in 4.0 mi SE 9.2 mph - 0.01 in   Overcast
6:56 AM 48.0 °F 46.0 °F 93% 30.22 in 8.0 mi SSE 5.8 mph - N/A   Overcast
7:56 AM 50.0 °F 46.0 °F 86% 30.25 in 9.0 mi Calm Calm - N/A   Overcast
8:33 AM 51.8 °F 46.4 °F 82% 30.26 in 9.0 mi Calm Calm - N/A   Overcast
8:56 AM 52.0 °F 48.0 °F 86% 30.27 in 9.0 mi South 3.5 mph - N/A   Overcast
9:56 AM 55.0 °F 48.9 °F 80% 30.28 in 9.0 mi West 9.2 mph - N/A   Overcast
10:56 AM 53.1 °F 48.0 °F 83% 30.29 in 10.0 mi West 12.7 mph - N/A   Mostly Cloudy
11:56 AM 54.0 °F 46.9 °F 77% 30.29 in 10.0 mi WNW 11.5 mph - N/A   Mostly Cloudy
12:42 PM 55.4 °F 46.4 °F 72% 30.27 in 10.0 mi West 12.7 mph - N/A   Mostly Cloudy
12:56 PM 55.0 °F 46.9 °F 74% 30.27 in 10.0 mi West 11.5 mph - N/A   Mostly Cloudy
1:56 PM 55.9 °F 46.9 °F 72% 30.26 in 10.0 mi West 12.7 mph - N/A   Mostly Cloudy
2:37 PM 55.4 °F 48.2 °F 77% 30.26 in 10.0 mi West 8.1 mph - N/A   Mostly Cloudy
2:56 PM 55.0 °F 46.9 °F 74% 30.25 in 10.0 mi West 9.2 mph - N/A   Mostly Cloudy
3:56 PM 57.0 °F 46.9 °F 69% 30.25 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:56 PM 55.0 °F 46.9 °F 74% 30.25 in 10.0 mi West 12.7 mph - N/A   Mostly Cloudy
5:56 PM 53.1 °F 46.0 °F 77% 30.26 in 10.0 mi West 13.8 mph - N/A   Scattered Clouds
6:56 PM 52.0 °F 46.0 °F 80% 30.25 in 10.0 mi West 11.5 mph - N/A   Scattered Clouds
7:56 PM 51.1 °F 46.0 °F 83% 30.26 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
8:56 PM 51.1 °F 46.0 °F 83% 30.26 in 10.0 mi WNW 6.9 mph - N/A   Clear
9:56 PM 50.0 °F 45.0 °F 83% 30.27 in 10.0 mi West 4.6 mph - N/A   Clear
10:56 PM 48.9 °F 45.0 °F 86% 30.27 in 10.0 mi Calm Calm - N/A   Clear
11:56 PM 48.0 °F 45.0 °F 89% 30.26 in 10.0 mi Calm Calm - N/A   Partly Cloudy