Weather History for San Francisco, CA

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Saturday, January 30, 2010

  Actual Average Record
Temperature  
Mean Temperature 51 °F 51 °F  
Max Temperature 58 °F 58 °F 71 °F (1976)
Min Temperature 44 °F 45 °F 30 °F (1975)
Degree Days  
Heating Degree Days 14 14  
Month to date heating degree days 404 441  
Since 1 July heating degree days 1398 1451  
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 47 °F    
Average Humidity 84    
Maximum Humidity 100    
Minimum Humidity 67    
Precipitation  
Precipitation 0.00 in 0.14 in 1.91 in (1963)
Month to date precipitation 5.97 4.05  
Year to date precipitation 5.97 4.05  
Since 1 July precipitation 12.47 11.62  
Sea Level Pressure  
Sea Level Pressure 30.03 in    
Wind  
Wind Speed 5 mph (SSE)    
Max Wind Speed 14 mph    
Max Gust Speed 16 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Jan. 30, 2010 Rise Set
Actual Time 7:14 AM PST 5:31 PM PST
Civil Twilight 6:47 AM PST 5:59 PM PST
Nautical Twilight 6:15 AM PST 6:30 PM PST
Astronomical Twilight 5:44 AM PST 7:01 PM PST
Moon 6:33 PM PST (1/30) 7:25 AM PST (1/30)
Length of Visible Light 11h 11m
Length of Day
10h 16m
Waxing Gibbous, 99% of the Moon is Illuminated
Jan 30
Waxing Gibbous
Feb 5
Last Quarter
Feb 13
New
Feb 21
First Quarter
Feb 28
Full

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 51.1 °F - 48.0 °F 89% 30.01 in 10.0 mi SSW 3.5 mph - N/A   Scattered Clouds
1:56 AM 48.0 °F - 46.9 °F 96% 30.01 in 10.0 mi South 4.6 mph - N/A   Scattered Clouds
2:56 AM 46.9 °F - 46.0 °F 97% 30.01 in 10.0 mi SSE 3.5 mph - N/A   Scattered Clouds
3:56 AM 46.9 °F - 46.0 °F 97% 30.01 in 10.0 mi Calm Calm - N/A   Scattered Clouds
4:56 AM 46.0 °F - 45.0 °F 96% 30.02 in 10.0 mi Calm Calm - N/A   Scattered Clouds
5:56 AM 46.0 °F 44.8 °F 45.0 °F 96% 30.02 in 10.0 mi South 3.5 mph - N/A   Scattered Clouds
6:56 AM 46.0 °F - 44.1 °F 93% 30.04 in 10.0 mi Calm Calm - N/A   Scattered Clouds
7:20 AM 46.4 °F - 44.6 °F 93% 30.04 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:56 AM 46.9 °F - 46.0 °F 97% 30.05 in 10.0 mi SE 4.6 mph - N/A   Mostly Cloudy
8:10 AM 48.2 °F - 46.4 °F 93% 30.05 in 10.0 mi SE 4.6 mph - N/A   Mostly Cloudy
8:32 AM 48.2 °F - 46.4 °F 93% 30.05 in 10.0 mi SSE 6.9 mph - N/A   Mostly Cloudy
8:41 AM 48.2 °F - 46.4 °F 93% 30.05 in 10.0 mi SE 8.1 mph - N/A   Scattered Clouds
8:56 AM 48.9 °F - 48.0 °F 97% 30.06 in 10.0 mi SSE 5.8 mph - N/A   Scattered Clouds
9:56 AM 52.0 °F - 48.0 °F 86% 30.06 in 10.0 mi East 4.6 mph - N/A   Scattered Clouds
10:56 AM 52.0 °F - 48.9 °F 89% 30.07 in 10.0 mi East 8.1 mph - N/A   Scattered Clouds
11:56 AM 54.0 °F - 48.9 °F 83% 30.07 in 10.0 mi East 6.9 mph - N/A   Mostly Cloudy
12:56 PM 54.0 °F - 48.9 °F 83% 30.05 in 10.0 mi ENE 3.5 mph - N/A   Mostly Cloudy
1:56 PM 54.0 °F - 48.9 °F 83% 30.02 in 10.0 mi East 4.6 mph - N/A   Scattered Clouds
2:56 PM 55.0 °F - 48.9 °F 80% 30.02 in 10.0 mi ENE 3.5 mph - N/A   Scattered Clouds
3:56 PM 57.0 °F - 46.9 °F 69% 30.02 in 10.0 mi WNW 8.1 mph - N/A   Scattered Clouds
4:56 PM 55.0 °F - 48.0 °F 77% 30.02 in 10.0 mi WNW 9.2 mph - N/A   Scattered Clouds
5:56 PM 53.1 °F - 48.9 °F 86% 30.01 in 10.0 mi West 11.5 mph - N/A   Scattered Clouds
6:56 PM 52.0 °F - 48.9 °F 89% 30.03 in 10.0 mi West 12.7 mph - N/A   Partly Cloudy
7:56 PM 52.0 °F - 48.0 °F 86% 30.03 in 10.0 mi West 11.5 mph - N/A   Partly Cloudy
8:56 PM 51.1 °F - 48.0 °F 89% 30.04 in 10.0 mi West 8.1 mph - N/A   Partly Cloudy
9:56 PM 50.0 °F - 48.0 °F 93% 30.04 in 10.0 mi West 4.6 mph - N/A   Partly Cloudy
10:56 PM 51.1 °F - 48.9 °F 92% 30.04 in 10.0 mi West 3.5 mph - N/A   Mostly Cloudy
11:56 PM 50.0 °F - 48.2 °F 94% 30.03 in 10.0 mi SE 4.6 mph - N/A   Mostly Cloudy