Weather History for San Francisco, CA

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Thursday, December 27, 2012

  Actual Average Record
Temperature  
Mean Temperature 50 °F 50 °F  
Max Temperature 54 °F 56 °F 70 °F (1953)
Min Temperature 46 °F 44 °F 33 °F (1954)
Degree Days  
Heating Degree Days 15 15  
Month to date heating degree days 328 385  
Since 1 July heating degree days 923 949  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 86 164  
Moisture  
Dew Point 40 °F    
Average Humidity 68    
Maximum Humidity 82    
Minimum Humidity 54    
Precipitation  
Precipitation 0.00 in 0.14 in 2.24 in (2004)
Month to date precipitation 5.96 3.47  
Year to date precipitation 21.18 20.09  
Since 1 July precipitation 10.72 7.01  
Sea Level Pressure  
Sea Level Pressure 30.14 in    
Wind  
Wind Speed 6 mph (NW)    
Max Wind Speed 15 mph    
Max Gust Speed 20 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 27, 2012 Rise Set
Actual Time 7:23 AM PST 4:58 PM PST
Civil Twilight 6:54 AM PST 5:27 PM PST
Nautical Twilight 6:21 AM PST 6:00 PM PST
Astronomical Twilight 5:49 AM PST 6:32 PM PST
Moon 4:45 PM PST (12/27) 6:39 AM PST (12/27)
Length of Visible Light 10h 33m
Length of Day
9h 34m
Full, 100% of the Moon is Illuminated
Dec 27
Full
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
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 50.0 °F - 39.0 °F 66% 30.11 in 10.0 mi WNW 10.4 mph - N/A   Scattered Clouds
1:56 AM 50.0 °F - 37.9 °F 63% 30.12 in 10.0 mi WNW 9.2 mph - N/A   Mostly Cloudy
2:56 AM 50.0 °F - 39.0 °F 66% 30.12 in 10.0 mi WNW 6.9 mph - N/A   Mostly Cloudy
3:56 AM 48.9 °F - 39.0 °F 69% 30.10 in 10.0 mi NW 8.1 mph - N/A   Mostly Cloudy
4:56 AM 48.9 °F - 37.9 °F 66% 30.11 in 10.0 mi WNW 9.2 mph - N/A   Overcast
5:56 AM 48.9 °F - 37.9 °F 66% 30.12 in 10.0 mi WNW 6.9 mph - N/A   Mostly Cloudy
6:56 AM 50.0 °F - 36.0 °F 59% 30.13 in 10.0 mi WNW 12.7 mph - N/A   Mostly Cloudy
7:56 AM 48.9 °F - 36.0 °F 61% 30.14 in 10.0 mi NW 8.1 mph - N/A   Partly Cloudy
8:56 AM 50.0 °F - 37.9 °F 63% 30.14 in 10.0 mi North 8.1 mph - N/A   Partly Cloudy
9:56 AM 50.0 °F - 39.9 °F 68% 30.17 in 10.0 mi NNE 6.9 mph - N/A   Partly Cloudy
10:56 AM 51.1 °F - 39.0 °F 63% 30.16 in 10.0 mi North 5.8 mph - N/A   Partly Cloudy
11:56 AM 51.8 °F - 39.2 °F 62% 30.14 in 10.0 mi North 6.9 mph - N/A   Partly Cloudy
12:56 PM 53.1 °F - 39.9 °F 61% 30.13 in 10.0 mi NNE 6.9 mph - N/A   Partly Cloudy
1:56 PM 53.1 °F - 41.0 °F 64% 30.12 in 10.0 mi NE 4.6 mph - N/A   Partly Cloudy
2:56 PM 54.0 °F - 39.9 °F 59% 30.12 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:56 PM 53.6 °F - 37.4 °F 54% 30.13 in 10.0 mi West 6.9 mph - N/A   Scattered Clouds
4:56 PM 52.0 °F - 39.0 °F 61% 30.13 in 10.0 mi West 6.9 mph - N/A   Scattered Clouds
5:56 PM 51.8 °F - 39.2 °F 62% 30.14 in 10.0 mi West 8.1 mph - N/A   Scattered Clouds
6:56 PM 50.0 °F - 41.0 °F 71% 30.15 in 10.0 mi WSW 3.5 mph - N/A   Partly Cloudy
7:56 PM 50.0 °F - 42.1 °F 74% 30.15 in 10.0 mi West 5.8 mph - N/A   Scattered Clouds
8:56 PM 46.9 °F - 41.0 °F 80% 30.16 in 10.0 mi Variable 3.5 mph - N/A   Scattered Clouds
9:56 PM 50.0 °F - 44.1 °F 80% 30.17 in 10.0 mi NNE 3.5 mph - N/A   Partly Cloudy
10:56 PM 46.0 °F 44.8 °F 41.0 °F 83% 30.18 in 10.0 mi South 3.5 mph - N/A   Mostly Cloudy
11:56 PM 46.9 °F - 41.0 °F 80% 30.18 in 10.0 mi Calm Calm - N/A   Mostly Cloudy