Weather History for San Francisco, CA

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Saturday, December 8, 2012

  Actual Average Record
Temperature  
Mean Temperature 53 °F 51 °F  
Max Temperature 59 °F 57 °F 69 °F (1988)
Min Temperature 46 °F 45 °F 29 °F (1978)
Degree Days  
Heating Degree Days 12 14  
Month to date heating degree days 69 106  
Since 1 July heating degree days 664 670  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 86 164  
Growing Degree Days 4 (Base 50)    
Moisture  
Dew Point 45 °F    
Average Humidity 67    
Maximum Humidity 89    
Minimum Humidity 44    
Precipitation  
Precipitation 0.00 in 0.12 in 0.98 in (2004)
Month to date precipitation 2.24 0.90  
Year to date precipitation 17.46 17.52  
Since 1 July precipitation 7.00 4.44  
Sea Level Pressure  
Sea Level Pressure 30.07 in    
Wind  
Wind Speed 4 mph (NNE)    
Max Wind Speed 12 mph    
Max Gust Speed 15 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 08, 2012 Rise Set
Actual Time 7:12 AM PST 4:50 PM PST
Civil Twilight 6:43 AM PST 5:20 PM PST
Nautical Twilight 6:10 AM PST 5:52 PM PST
Astronomical Twilight 5:38 AM PST 6:24 PM PST
Moon 1:48 AM PST (12/8) 1:19 PM PST (12/8)
Length of Visible Light 10h 36m
Length of Day
9h 38m
Waning Crescent, 27% of the Moon is Illuminated
Dec 8
Waning Crescent
Dec 13
New
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last 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 52.0 °F - 46.0 °F 80% 30.08 in 10.0 mi Calm Calm - N/A   Clear
1:50 AM 46.4 °F 44.3 °F 42.8 °F 87% 30.08 in 10.0 mi SW 4.6 mph - N/A   Mostly Cloudy
1:56 AM 46.9 °F - 43.0 °F 86% 30.08 in 10.0 mi WSW 4.6 mph - N/A   Mostly Cloudy
2:56 AM 48.9 °F - 45.0 °F 86% 30.08 in 10.0 mi WNW 4.6 mph - N/A   Overcast
3:45 AM 51.8 °F - 48.2 °F 88% 30.06 in 10.0 mi NNE 5.8 mph - N/A   Mostly Cloudy
3:52 AM 51.8 °F - 48.2 °F 88% 30.07 in 10.0 mi NNE 5.8 mph - N/A   Mostly Cloudy
3:56 AM 52.0 °F - 48.0 °F 86% 30.06 in 10.0 mi NNE 5.8 mph - N/A   Mostly Cloudy
4:13 AM 51.8 °F - 48.2 °F 88% 30.06 in 10.0 mi NE 4.6 mph - N/A   Scattered Clouds
4:50 AM 53.6 °F - 46.4 °F 77% 30.06 in 10.0 mi NE 5.8 mph - N/A   Mostly Cloudy
4:56 AM 52.0 °F - 46.9 °F 83% 30.06 in 10.0 mi NNE 4.6 mph - N/A   Mostly Cloudy
5:12 AM 51.8 °F - 46.4 °F 82% 30.06 in 10.0 mi NNE 5.8 mph - N/A   Overcast
5:51 AM 51.8 °F - 46.4 °F 82% 30.06 in 10.0 mi East 3.5 mph - N/A   Mostly Cloudy
5:56 AM 52.0 °F - 46.0 °F 80% 30.06 in 10.0 mi East 3.5 mph - N/A   Mostly Cloudy
6:56 AM 50.0 °F - 46.0 °F 86% 30.07 in 10.0 mi ESE 4.6 mph - N/A   Mostly Cloudy
7:38 AM 50.0 °F - 46.4 °F 87% 30.07 in 9.0 mi SE 3.5 mph - N/A   Scattered Clouds
7:56 AM 50.0 °F - 46.9 °F 89% 30.07 in 9.0 mi SSE 4.6 mph - N/A   Scattered Clouds
8:56 AM 52.0 °F - 45.0 °F 77% 30.09 in 9.0 mi NE 9.2 mph - N/A   Scattered Clouds
9:56 AM 52.0 °F - 46.9 °F 83% 30.12 in 10.0 mi East 4.6 mph - N/A   Scattered Clouds
10:56 AM 54.0 °F - 46.0 °F 75% 30.12 in 10.0 mi Calm Calm - N/A   Scattered Clouds
11:56 AM 57.0 °F - 46.0 °F 67% 30.09 in 10.0 mi North 8.1 mph - N/A   Mostly Cloudy
12:56 PM 55.9 °F - 46.9 °F 72% 30.07 in 10.0 mi North 4.6 mph - N/A   Mostly Cloudy
1:56 PM 55.9 °F - 45.0 °F 67% 30.05 in 10.0 mi Calm Calm - N/A   Scattered Clouds
2:56 PM 57.9 °F - 39.0 °F 49% 30.05 in 10.0 mi Calm Calm - N/A   Overcast
3:56 PM 59.0 °F - 37.9 °F 46% 30.05 in 10.0 mi West 4.6 mph - N/A   Overcast
4:56 PM 55.9 °F - 43.0 °F 62% 30.05 in 10.0 mi West 8.1 mph - N/A   Overcast
5:56 PM 54.0 °F - 46.0 °F 75% 30.06 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
6:56 PM 54.0 °F - 46.0 °F 75% 30.06 in 10.0 mi West 4.6 mph - N/A   Scattered Clouds
7:56 PM 52.0 °F - 43.0 °F 71% 30.07 in 10.0 mi South 4.6 mph - N/A   Partly Cloudy
8:56 PM 51.1 °F - 43.0 °F 74% 30.08 in 10.0 mi West 4.6 mph - N/A   Partly Cloudy
9:56 PM 51.1 °F - 41.0 °F 68% 30.08 in 10.0 mi Calm Calm - N/A   Partly Cloudy
10:56 PM 50.0 °F - 42.1 °F 74% 30.09 in 10.0 mi Calm Calm - N/A   Clear
11:56 PM 48.0 °F - 39.9 °F 74% 30.10 in 10.0 mi Calm Calm - N/A   Clear