Weather History for San Francisco, CA

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Monday, January 21, 2013

  Actual Average Record
Temperature  
Mean Temperature 47 °F 50 °F  
Max Temperature 56 °F 57 °F 68 °F (2014)
Min Temperature 38 °F 44 °F 30 °F (1962)
Degree Days  
Heating Degree Days 18 15  
Month to date heating degree days 370 315  
Since 1 July heating degree days 1365 1325  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 41 °F    
Average Humidity 68    
Maximum Humidity 89    
Minimum Humidity 47    
Precipitation  
Precipitation 0.00 in 0.13 in 4.07 in (1967)
Month to date precipitation 0.10 2.88  
Year to date precipitation 0.10 2.88  
Since 1 July precipitation 11.10 10.45  
Sea Level Pressure  
Sea Level Pressure 30.14 in    
Wind  
Wind Speed 2 mph (East)    
Max Wind Speed 8 mph    
Max Gust Speed 10 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Jan. 21, 2013 Rise Set
Actual Time 7:20 AM PST 5:21 PM PST
Civil Twilight 6:52 AM PST 5:49 PM PST
Nautical Twilight 6:20 AM PST 6:21 PM PST
Astronomical Twilight 5:49 AM PST 6:52 PM PST
Moon 1:05 PM PST (1/21) 2:53 AM PST (1/21)
Length of Visible Light 10h 57m
Length of Day
10h 01m
Waxing Gibbous, 76% of the Moon is Illuminated
Jan 21
Waxing Gibbous
Jan 26
Full
Feb 3
Last Quarter
Feb 9
New
Feb 17
First Quarter

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 - 39.0 °F 74% 30.16 in 10.0 mi Calm Calm - N/A   Clear
1:56 AM 48.0 °F - 42.1 °F 80% 30.16 in 10.0 mi NNE 4.6 mph - N/A   Clear
2:56 AM 46.9 °F - 41.0 °F 80% 30.15 in 10.0 mi NE 3.5 mph - N/A   Clear
3:56 AM 46.9 °F - 42.1 °F 83% 30.14 in 10.0 mi NNE 5.8 mph - N/A   Clear
4:56 AM 42.1 °F 40.2 °F 37.9 °F 85% 30.13 in 10.0 mi South 3.5 mph - N/A   Clear
5:56 AM 39.9 °F 37.8 °F 36.0 °F 86% 30.12 in 10.0 mi South 3.5 mph - N/A   Clear
6:56 AM 41.0 °F - 37.0 °F 86% 30.14 in 10.0 mi Calm Calm - N/A   Clear
7:56 AM 43.0 °F - 39.0 °F 86% 30.16 in 10.0 mi Calm Calm - N/A   Clear
8:56 AM 45.0 °F - 39.0 °F 80% 30.17 in 10.0 mi Calm Calm - N/A   Clear
9:56 AM 51.1 °F - 39.9 °F 66% 30.18 in 10.0 mi Calm Calm - N/A   Clear
10:56 AM 51.1 °F - 41.0 °F 68% 30.19 in 10.0 mi NE 3.5 mph - N/A   Clear
11:56 AM 51.1 °F - 42.1 °F 71% 30.17 in 10.0 mi Calm Calm - N/A   Partly Cloudy
12:56 PM 52.0 °F - 43.0 °F 71% 30.14 in 10.0 mi NNE 3.5 mph - N/A   Partly Cloudy
1:56 PM 53.1 °F - 43.0 °F 69% 30.12 in 10.0 mi NE 3.5 mph - N/A   Partly Cloudy
2:56 PM 53.1 °F - 44.1 °F 71% 30.11 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:56 PM 55.0 °F - 43.0 °F 64% 30.10 in 10.0 mi NNE 4.6 mph - N/A   Scattered Clouds
4:56 PM 55.0 °F - 39.9 °F 57% 30.09 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:56 PM 55.9 °F - 36.0 °F 47% 30.09 in 10.0 mi SSE 4.6 mph - N/A   Scattered Clouds
6:56 PM 53.1 °F - 39.9 °F 61% 30.11 in 10.0 mi South 4.6 mph - N/A   Partly Cloudy
7:56 PM 51.1 °F - 39.9 °F 66% 30.11 in 10.0 mi South 4.6 mph - N/A   Partly Cloudy
8:56 PM 52.0 °F - 37.0 °F 57% 30.12 in 10.0 mi Calm Calm - N/A   Partly Cloudy
9:56 PM 50.0 °F - 41.0 °F 71% 30.14 in 10.0 mi Calm Calm - N/A   Partly Cloudy
10:56 PM 48.9 °F - 42.1 °F 77% 30.14 in 10.0 mi Calm Calm - N/A   Partly Cloudy
11:56 PM 48.0 °F - 45.0 °F 89% 30.12 in 10.0 mi Calm Calm - N/A   Partly Cloudy