Weather History for San Francisco, CA

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Sunday, December 28, 2014

  Actual Average Record
Temperature  
Mean Temperature 50 °F 50 °F  
Max Temperature 57 °F 56 °F 71 °F (1967)
Min Temperature 43 °F 44 °F 32 °F (1966)
Degree Days  
Heating Degree Days 15 15  
Month to date heating degree days 203 400  
Since 1 July heating degree days 391 964  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 497 164  
Moisture  
Dew Point 45 °F    
Average Humidity 77    
Maximum Humidity 93    
Minimum Humidity 61    
Precipitation  
Precipitation 0.00 in 0.14 in 1.46 in (1991)
Month to date precipitation 10.66 3.61  
Year to date precipitation 20.69 20.23  
Since 1 July precipitation 13.38 7.15  
Sea Level Pressure  
Sea Level Pressure 30.30 in    
Wind  
Wind Speed 4 mph (WSW)    
Max Wind Speed 13 mph    
Max Gust Speed 16 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 28, 2014 Rise Set
Actual Time 7:23 AM PST 4:58 PM PST
Civil Twilight 6:54 AM PST 5:28 PM PST
Nautical Twilight 6:21 AM PST 6:00 PM PST
Astronomical Twilight 5:49 AM PST 6:32 PM PST
Moon 11:57 AM PST (12/28) No Moon Set
Length of Visible Light 10h 33m
Length of Day
9h 35m
Waxing Crescent, 51% of the Moon is Illuminated
Dec 28
Waxing Crescent
Jan 4
Full
Jan 13
Last Quarter
Jan 20
New
Jan 26
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 - 43.0 °F 77% 30.37 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:56 AM 46.0 °F 44.8 °F 43.0 °F 89% 30.36 in 10.0 mi South 3.5 mph - N/A   Scattered Clouds
2:56 AM 46.9 °F - 43.0 °F 86% 30.35 in 10.0 mi SSE 5.8 mph - N/A   Mostly Cloudy
3:56 AM 46.9 °F - 42.1 °F 83% 30.33 in 10.0 mi South 3.5 mph - N/A   Mostly Cloudy
4:56 AM 46.0 °F - 41.0 °F 83% 30.33 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:56 AM 44.1 °F - 41.0 °F 89% 30.33 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:56 AM 44.1 °F - 41.0 °F 89% 30.33 in 10.0 mi Calm Calm - N/A   Scattered Clouds
7:56 AM 44.1 °F - 41.0 °F 89% 30.33 in 10.0 mi Calm Calm - N/A   Scattered Clouds
8:56 AM 48.0 °F - 41.0 °F 77% 30.34 in 10.0 mi SSE 3.5 mph - N/A   Partly Cloudy
9:56 AM 50.0 °F - 43.0 °F 77% 30.35 in 10.0 mi Calm Calm - N/A   Partly Cloudy
10:56 AM 52.0 °F - 43.0 °F 71% 30.35 in 10.0 mi Calm Calm - N/A   Partly Cloudy
11:56 AM 52.0 °F - 44.1 °F 74% 30.31 in 10.0 mi East 3.5 mph - N/A   Partly Cloudy
12:56 PM 53.1 °F - 44.1 °F 71% 30.28 in 10.0 mi ENE 4.6 mph - N/A   Partly Cloudy
1:56 PM 54.0 °F - 44.1 °F 69% 30.27 in 10.0 mi ENE 4.6 mph - N/A   Partly Cloudy
2:56 PM 55.9 °F - 43.0 °F 62% 30.25 in 10.0 mi Calm Calm - N/A   Partly Cloudy
3:56 PM 57.0 °F - 46.9 °F 69% 30.25 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
4:56 PM 55.0 °F - 48.9 °F 80% 30.24 in 10.0 mi WSW 10.4 mph - N/A   Partly Cloudy
5:56 PM 54.0 °F - 48.9 °F 83% 30.26 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy
6:56 PM 54.0 °F - 50.0 °F 86% 30.25 in 10.0 mi WNW 5.8 mph - N/A   Scattered Clouds
7:56 PM 55.0 °F - 48.9 °F 80% 30.25 in 10.0 mi Calm Calm - N/A   Scattered Clouds
8:56 PM 53.6 °F - 50.0 °F 88% 30.25 in 10.0 mi WNW 5.8 mph - N/A   Scattered Clouds
9:56 PM 54.0 °F - 51.1 °F 90% 30.25 in 10.0 mi West 6.9 mph - N/A   Scattered Clouds
10:56 PM 54.0 °F - 51.1 °F 90% 30.25 in 10.0 mi West 10.4 mph - N/A   Scattered Clouds
11:56 PM 53.1 °F - 48.9 °F 86% 30.23 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy