Weather History for San Francisco, CA

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Monday, December 24, 2012

  Actual Average Record
Temperature  
Mean Temperature 51 °F 50 °F  
Max Temperature 56 °F 56 °F 65 °F (1967)
Min Temperature 46 °F 44 °F 29 °F (1990)
Degree Days  
Heating Degree Days 14 15  
Month to date heating degree days 284 340  
Since 1 July heating degree days 879 904  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 86 164  
Moisture  
Dew Point 42 °F    
Average Humidity 74    
Maximum Humidity 93    
Minimum Humidity 54    
Precipitation  
Precipitation T in 0.15 in 2.00 in (1983)
Month to date precipitation 4.86 3.04  
Year to date precipitation 20.08 19.66  
Since 1 July precipitation 9.62 6.58  
Sea Level Pressure  
Sea Level Pressure 30.16 in    
Wind  
Wind Speed 5 mph (NNW)    
Max Wind Speed 13 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. 24, 2012 Rise Set
Actual Time 7:22 AM PST 4:56 PM PST
Civil Twilight 6:53 AM PST 5:25 PM PST
Nautical Twilight 6:20 AM PST 5:58 PM PST
Astronomical Twilight 5:48 AM PST 6:30 PM PST
Moon 2:26 PM PST (12/24) 4:07 AM PST (12/24)
Length of Visible Light 10h 32m
Length of Day
9h 34m
Waxing Gibbous, 89% of the Moon is Illuminated
Dec 24
Waxing Gibbous
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 52.0 °F - 45.0 °F 77% 30.05 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
1:56 AM 51.1 °F - 44.1 °F 77% 30.07 in 10.0 mi West 8.1 mph - N/A   Scattered Clouds
2:56 AM 52.0 °F - 45.0 °F 77% 30.09 in 10.0 mi NNW 5.8 mph - N/A   Partly Cloudy
3:56 AM 50.0 °F - 45.0 °F 83% 30.09 in 10.0 mi West 3.5 mph - N/A   Partly Cloudy
4:56 AM 46.9 °F - 44.1 °F 90% 30.10 in 10.0 mi West 8.1 mph - 0.00 in   Scattered Clouds
5:56 AM 46.9 °F - 43.0 °F 86% 30.14 in 10.0 mi West 8.1 mph - N/A   Mostly Cloudy
6:56 AM 48.0 °F - 43.0 °F 83% 30.17 in 10.0 mi WNW 3.5 mph - N/A   Scattered Clouds
7:56 AM 48.9 °F - 43.0 °F 80% 30.18 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
8:56 AM 51.1 °F - 45.0 °F 80% 30.19 in 10.0 mi South 3.5 mph - N/A   Scattered Clouds
9:56 AM 51.1 °F - 45.0 °F 80% 30.22 in 10.0 mi NE 5.8 mph - N/A   Scattered Clouds
10:56 AM 53.1 °F - 45.0 °F 74% 30.20 in 10.0 mi NE 3.5 mph - N/A   Scattered Clouds
11:56 AM 54.0 °F - 44.1 °F 69% 30.19 in 10.0 mi Calm Calm - N/A   Scattered Clouds
12:56 PM 55.0 °F - 43.0 °F 64% 30.18 in 10.0 mi North 4.6 mph - N/A   Scattered Clouds
1:56 PM 55.9 °F - 45.0 °F 67% 30.17 in 10.0 mi NE 3.5 mph - N/A   Mostly Cloudy
2:56 PM 55.9 °F - 41.0 °F 57% 30.16 in 10.0 mi NNW 5.8 mph - N/A   Mostly Cloudy
3:56 PM 55.0 °F - 42.1 °F 62% 30.17 in 10.0 mi North 5.8 mph - N/A   Mostly Cloudy
4:56 PM 54.0 °F - 39.9 °F 59% 30.17 in 10.0 mi NNW 6.9 mph - N/A   Mostly Cloudy
5:56 PM 51.1 °F - 41.0 °F 68% 30.16 in 10.0 mi WNW 5.8 mph - N/A   Scattered Clouds
6:56 PM 52.0 °F - 41.0 °F 66% 30.17 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:56 PM 53.1 °F - 37.9 °F 57% 30.16 in 10.0 mi NE 5.8 mph - N/A   Mostly Cloudy
8:56 PM 51.1 °F - 39.9 °F 66% 30.17 in 10.0 mi ESE 3.5 mph - N/A   Mostly Cloudy
9:56 PM 51.1 °F - 37.0 °F 59% 30.17 in 10.0 mi ENE 4.6 mph - N/A   Scattered Clouds
10:56 PM 46.9 °F - 41.0 °F 80% 30.17 in 10.0 mi South 3.5 mph - N/A   Mostly Cloudy
11:56 PM 46.0 °F 44.8 °F 39.9 °F 79% 30.15 in 10.0 mi SSE 3.5 mph - N/A   Mostly Cloudy