Weather History for San Francisco, CA

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Tuesday, August 14, 2012

  Actual Average Record
Temperature  
Mean Temperature 61 °F 64 °F  
Max Temperature 68 °F 73 °F 85 °F (1995)
Min Temperature 54 °F 56 °F 47 °F (1946)
Degree Days  
Heating Degree Days 4 1  
Month to date heating degree days 44 25  
Since 1 June heating degree days 237 195  
Since 1 July heating degree days 122 90  
Cooling Degree Days 0 1  
Month to date cooling degree days 0 14  
Year to date cooling degree days 28 78  
Since 1 June cooling degree days 21 59  
Growing Degree Days 11 (Base 50)    
Moisture  
Dew Point 52 °F    
Average Humidity 74    
Maximum Humidity 89    
Minimum Humidity 58    
Precipitation  
Precipitation 0.00 in 0.00 in 0.13 in (1976)
Month to date precipitation T 0.01  
Year to date precipitation 10.46 13.09  
Since 1 July precipitation T 0.01  
Sea Level Pressure  
Sea Level Pressure 29.81 in    
Wind  
Wind Speed 13 mph (WNW)    
Max Wind Speed 25 mph    
Max Gust Speed 30 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Aug. 14, 2012 Rise Set
Actual Time 6:24 AM PDT 8:02 PM PDT
Civil Twilight 5:56 AM PDT 8:30 PM PDT
Nautical Twilight 5:23 AM PDT 9:03 PM PDT
Astronomical Twilight 4:47 AM PDT 9:39 PM PDT
Moon 3:29 AM PDT (8/14) 5:59 PM PDT (8/14)
Length of Visible Light 14h 33m
Length of Day
13h 37m
Waning Crescent, 9% of the Moon is Illuminated
Aug 14
Waning Crescent
Aug 17
New
Aug 24
First Quarter
Aug 31
Full
Sep 8
Last Quarter

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 55.0 °F 51.1 °F 86% 29.81 in 10.0 mi WNW 13.8 mph - N/A   Partly Cloudy
1:56 AM 55.0 °F 51.1 °F 86% 29.82 in 10.0 mi WNW 12.7 mph - N/A   Partly Cloudy
2:56 AM 55.4 °F 50.0 °F 82% 29.81 in 10.0 mi WNW 11.5 mph - N/A   Partly Cloudy
3:56 AM 55.0 °F 50.0 °F 83% 29.81 in 10.0 mi NW 8.1 mph - N/A   Partly Cloudy
4:56 AM 54.0 °F 50.0 °F 86% 29.81 in 10.0 mi WNW 10.4 mph - N/A   Scattered Clouds
5:56 AM 54.0 °F 50.0 °F 86% 29.81 in 10.0 mi WNW 12.7 mph - N/A   Mostly Cloudy
6:56 AM 54.0 °F 50.0 °F 86% 29.83 in 10.0 mi WNW 9.2 mph - N/A   Mostly Cloudy
7:56 AM 55.9 °F 51.1 °F 84% 29.84 in 10.0 mi WNW 8.1 mph - N/A   Mostly Cloudy
8:56 AM 60.1 °F 51.1 °F 72% 29.84 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:56 AM 64.0 °F 52.0 °F 65% 29.84 in 10.0 mi North 3.5 mph - N/A   Scattered Clouds
10:56 AM 66.0 °F 52.0 °F 60% 29.83 in 10.0 mi NW 11.5 mph - N/A   Scattered Clouds
11:56 AM 66.0 °F 53.1 °F 63% 29.82 in 10.0 mi NW 17.3 mph - N/A   Scattered Clouds
12:56 PM 66.9 °F 54.0 °F 63% 29.82 in 10.0 mi NW 15.0 mph - N/A   Mostly Cloudy
1:56 PM 66.9 °F 54.0 °F 63% 29.81 in 10.0 mi NW 19.6 mph - N/A   Scattered Clouds
2:56 PM 66.9 °F 54.0 °F 63% 29.80 in 10.0 mi WNW 20.7 mph - N/A   Scattered Clouds
3:56 PM 66.9 °F 54.0 °F 63% 29.78 in 10.0 mi WNW 19.6 mph 27.6 mph N/A   Scattered Clouds
4:56 PM 64.9 °F 54.0 °F 68% 29.78 in 10.0 mi WNW 24.2 mph - N/A   Scattered Clouds
5:56 PM 64.0 °F 53.1 °F 67% 29.78 in 10.0 mi WNW 20.7 mph - N/A   Scattered Clouds
6:56 PM 62.1 °F 53.1 °F 72% 29.79 in 10.0 mi WNW 18.4 mph - N/A   Scattered Clouds
7:56 PM 60.1 °F 53.1 °F 78% 29.79 in 10.0 mi WNW 13.8 mph - N/A   Scattered Clouds
8:56 PM 59.0 °F 53.1 °F 81% 29.81 in 10.0 mi WNW 15.0 mph - N/A   Scattered Clouds
9:56 PM 59.0 °F 53.1 °F 81% 29.82 in 10.0 mi WNW 12.7 mph - N/A   Scattered Clouds
10:56 PM 57.9 °F 53.1 °F 84% 29.82 in 10.0 mi WNW 11.5 mph - N/A   Scattered Clouds
11:56 PM 57.9 °F 53.1 °F 84% 29.82 in 10.0 mi WNW 12.7 mph - N/A   Scattered Clouds