Weather History for San Francisco, CA

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Friday, February 1, 2013

  Actual Average Record
Temperature  
Mean Temperature 54 °F 52 °F  
Max Temperature 64 °F 58 °F 70 °F (1976)
Min Temperature 44 °F 45 °F 30 °F (1950)
Degree Days  
Heating Degree Days 11 13  
Month to date heating degree days 11 13  
Since 1 July heating degree days 1506 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 4 (Base 50)    
Moisture  
Dew Point 44 °F    
Average Humidity 71    
Maximum Humidity 93    
Minimum Humidity 48    
Precipitation  
Precipitation 0.00 in 0.15 in 1.06 in (1960)
Month to date precipitation 0.00 0.15  
Year to date precipitation 0.20 4.34  
Since 1 July precipitation 11.20 11.91  
Sea Level Pressure  
Sea Level Pressure 30.19 in    
Wind  
Wind Speed 3 mph (South)    
Max Wind Speed 13 mph    
Max Gust Speed 15 mph    
Visibility 9 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Feb. 01, 2013 Rise Set
Actual Time 7:12 AM PST 5:33 PM PST
Civil Twilight 6:45 AM PST 6:01 PM PST
Nautical Twilight 6:14 AM PST 6:32 PM PST
Astronomical Twilight 5:43 AM PST 7:03 PM PST
Moon 11:38 PM PST (2/1) 9:57 AM PST (2/1)
Length of Visible Light 11h 16m
Length of Day
10h 20m
Waning Gibbous, 69% of the Moon is Illuminated
Feb 1
Waning Gibbous
Feb 3
Last Quarter
Feb 9
New
Feb 17
First Quarter
Feb 25
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 46.9 °F - 43.0 °F 86% 30.20 in 9.0 mi Calm Calm - N/A   Clear
1:56 AM 46.0 °F - 41.0 °F 83% 30.20 in 9.0 mi Calm Calm - N/A   Clear
2:56 AM 45.0 °F 42.6 °F 41.0 °F 86% 30.20 in 9.0 mi South 4.6 mph - N/A   Clear
3:56 AM 46.4 °F - 42.8 °F 87% 30.19 in 7.0 mi Calm Calm - N/A   Clear
4:56 AM 44.1 °F - 41.0 °F 89% 30.19 in 7.0 mi Calm Calm - N/A   Clear
5:56 AM 45.0 °F - 42.1 °F 90% 30.19 in 7.0 mi Calm Calm - N/A   Clear
6:56 AM 45.0 °F 41.2 °F 41.0 °F 86% 30.20 in 9.0 mi SSE 6.9 mph - N/A   Clear
7:56 AM 46.0 °F 43.9 °F 42.1 °F 86% 30.21 in 9.0 mi SE 4.6 mph - N/A   Clear
8:56 AM 50.0 °F - 45.0 °F 83% 30.21 in 9.0 mi East 4.6 mph - N/A   Clear
9:56 AM 54.0 °F - 44.1 °F 69% 30.21 in 9.0 mi ESE 5.8 mph - N/A   Clear
10:56 AM 55.0 °F - 48.0 °F 77% 30.21 in 9.0 mi East 6.9 mph - N/A   Clear
11:56 AM 55.0 °F - 46.0 °F 72% 30.18 in 9.0 mi East 6.9 mph - N/A   Clear
12:56 PM 57.0 °F - 45.0 °F 64% 30.15 in 9.0 mi Calm Calm - N/A   Clear
1:56 PM 59.0 °F - 45.0 °F 60% 30.13 in 9.0 mi Calm Calm - N/A   Partly Cloudy
2:56 PM 62.1 °F - 46.0 °F 56% 30.13 in 9.0 mi Calm Calm - N/A   Partly Cloudy
3:56 PM 62.1 °F - 45.0 °F 53% 30.12 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:56 PM 62.1 °F - 43.0 °F 50% 30.14 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:56 PM 60.1 °F - 44.1 °F 55% 30.15 in 10.0 mi WNW 3.5 mph - N/A   Mostly Cloudy
6:56 PM 57.0 °F - 43.0 °F 59% 30.18 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:56 PM 55.0 °F - 46.0 °F 72% 30.19 in 10.0 mi Calm Calm - N/A   Scattered Clouds
8:56 PM 54.0 °F - 45.0 °F 72% 30.20 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:56 PM 51.1 °F - 44.1 °F 77% 30.20 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
10:48 PM 48.2 °F - 44.6 °F 87% 30.22 in 6.0 mi WNW 6.9 mph - N/A   Scattered Clouds
10:56 PM 48.9 °F - 46.0 °F 90% 30.22 in 5.0 mi West 10.4 mph - N/A   Scattered Clouds
11:56 PM 48.9 °F - 46.0 °F 90% 30.23 in 4.0 mi West 9.2 mph - N/A   Partly Cloudy