Weather History for San Francisco, CA

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Monday, January 2, 2012

  Actual Average Record
Temperature  
Mean Temperature 50 °F 50 °F  
Max Temperature 55 °F 56 °F 69 °F (1996)
Min Temperature 45 °F 44 °F 29 °F (1960)
Degree Days  
Heating Degree Days 15 15  
Month to date heating degree days 29 30  
Since 1 July heating degree days 1136 1040  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 46 °F    
Average Humidity 85    
Maximum Humidity 93    
Minimum Humidity 77    
Precipitation  
Precipitation 0.00 in 0.14 in 1.67 in (1977)
Month to date precipitation 0.00 0.28  
Year to date precipitation 0.00 0.28  
Since 1 July precipitation 2.87 7.85  
Sea Level Pressure  
Sea Level Pressure 30.27 in    
Wind  
Wind Speed 3 mph (South)    
Max Wind Speed 15 mph    
Max Gust Speed 17 mph    
Visibility 8 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jan. 02, 2012 Rise Set
Actual Time 7:24 AM PST 5:02 PM PST
Civil Twilight 6:55 AM PST 5:31 PM PST
Nautical Twilight 6:22 AM PST 6:04 PM PST
Astronomical Twilight 5:50 AM PST 6:36 PM PST
Moon 12:18 PM PST (1/2) 1:25 AM PST (1/2)
Length of Visible Light 10h 36m
Length of Day
9h 37m
Waxing Gibbous, 65% of the Moon is Illuminated
Jan 2
Waxing Gibbous
Jan 8
Full
Jan 16
Last Quarter
Jan 22
New
Jan 30
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 42.1 °F 80% 30.19 in 10.0 mi Calm Calm - N/A   Clear
1:56 AM 48.0 °F 44.1 °F 86% 30.18 in 10.0 mi Calm Calm - N/A   Clear
2:56 AM 46.9 °F 42.1 °F 83% 30.19 in 9.0 mi SW 3.5 mph - N/A   Mostly Cloudy
3:56 AM 48.9 °F 44.1 °F 83% 30.21 in 9.0 mi Calm Calm - N/A   Mostly Cloudy
4:56 AM 46.9 °F 43.0 °F 86% 30.23 in 9.0 mi Calm Calm - N/A   Mostly Cloudy
5:56 AM 51.1 °F 46.0 °F 83% 30.25 in 9.0 mi Calm Calm - N/A   Mostly Cloudy
6:56 AM 50.0 °F 46.4 °F 87% 30.25 in 5.0 mi East 12.7 mph - N/A   Mostly Cloudy
7:56 AM 48.9 °F 45.0 °F 86% 30.29 in 5.0 mi SSE 8.1 mph - N/A   Mostly Cloudy
8:56 AM 50.0 °F 46.0 °F 86% 30.32 in 5.0 mi South 4.6 mph - N/A   Overcast
9:56 AM 51.1 °F 46.0 °F 83% 30.32 in 5.0 mi Calm Calm - N/A   Haze
10:56 AM 52.0 °F 46.0 °F 80% 30.31 in 5.0 mi ENE 3.5 mph - N/A   Haze
11:56 AM 53.6 °F 46.4 °F 77% 30.29 in 5.0 mi North 4.6 mph - N/A   Haze
12:56 PM 52.0 °F 46.9 °F 83% 30.27 in 5.0 mi East 4.6 mph - N/A   Haze
1:56 PM 52.0 °F 46.9 °F 83% 30.26 in 6.0 mi Calm Calm - N/A   Haze
2:56 PM 52.0 °F 46.9 °F 83% 30.26 in 7.0 mi Calm Calm - N/A   Mostly Cloudy
3:56 PM 54.0 °F 46.9 °F 77% 30.26 in 8.0 mi Calm Calm - N/A   Mostly Cloudy
4:56 PM 54.0 °F 46.9 °F 77% 30.26 in 9.0 mi SE 4.6 mph - N/A   Scattered Clouds
5:56 PM 54.0 °F 48.0 °F 80% 30.28 in 10.0 mi WNW 6.9 mph - N/A   Scattered Clouds
6:56 PM 52.0 °F 48.0 °F 86% 30.27 in 10.0 mi WSW 3.5 mph - N/A   Partly Cloudy
7:56 PM 51.1 °F 46.9 °F 86% 30.29 in 10.0 mi Calm Calm - N/A   Clear
8:56 PM 51.1 °F 48.0 °F 89% 30.31 in 10.0 mi West 6.9 mph - N/A   Mostly Cloudy
9:56 PM 51.8 °F 48.2 °F 88% 30.30 in 10.0 mi West 4.6 mph - N/A   Mostly Cloudy
10:56 PM 48.9 °F 46.0 °F 90% 30.31 in 10.0 mi SE 3.5 mph - N/A   Mostly Cloudy
11:56 PM 48.9 °F 46.9 °F 93% 30.32 in 9.0 mi WNW 3.5 mph - N/A   Mostly Cloudy