Weather History for KSFO - August, 2012

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Sunday, August 12, 2012

  Actual Average Record
Temperature  
Mean Temperature 59 °F 64 °F  
Max Temperature 65 °F 72 °F 89 °F (1958)
Min Temperature 53 °F 56 °F 47 °F (1946)
Degree Days  
Heating Degree Days 6 1  
Month to date heating degree days 37 23  
Since 1 June heating degree days 230 193  
Since 1 July heating degree days 115 88  
Cooling Degree Days 0 1  
Month to date cooling degree days 0 12  
Year to date cooling degree days 28 76  
Since 1 June cooling degree days 21 57  
Growing Degree Days 8 (Base 50)    
Moisture  
Dew Point 51 °F    
Average Humidity 76    
Maximum Humidity 89    
Minimum Humidity 63    
Precipitation  
Precipitation 0.00 in 0.00 in 0.05 in (1999)
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 29.84 in    
Wind  
Wind Speed 15 mph (WNW)    
Max Wind Speed 24 mph    
Max Gust Speed 28 mph    
Visibility 10 miles    
Events Fog    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Aug. 12, 2012 Rise Set
Actual Time 6:23 AM PDT 8:04 PM PDT
Civil Twilight 5:55 AM PDT 8:32 PM PDT
Nautical Twilight 5:21 AM PDT 9:06 PM PDT
Astronomical Twilight 4:45 AM PDT 9:42 PM PDT
Moon 1:43 AM PDT (8/12) 4:32 PM PDT (8/12)
Length of Visible Light 14h 37m
Length of Day
13h 41m
Waning Crescent, 23% of the Moon is Illuminated
Aug 12
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 54.0 °F 50.0 °F 86% 29.84 in 10.0 mi WNW 13.8 mph - N/A   Partly Cloudy
1:56 AM 54.0 °F 50.0 °F 86% 29.84 in 10.0 mi WNW 13.8 mph - N/A   Partly Cloudy
2:56 AM 54.0 °F 50.0 °F 86% 29.84 in 10.0 mi WNW 9.2 mph - N/A   Partly Cloudy
3:56 AM 54.0 °F 50.0 °F 86% 29.84 in 10.0 mi WNW 11.5 mph - N/A   Partly Cloudy
4:56 AM 53.1 °F 50.0 °F 89% 29.84 in 10.0 mi WNW 10.4 mph - N/A   Partly Cloudy
5:56 AM 53.1 °F 50.0 °F 89% 29.85 in 10.0 mi WNW 11.5 mph - N/A   Scattered Clouds
6:56 AM 53.1 °F 50.0 °F 89% 29.86 in 10.0 mi WNW 8.1 mph - N/A   Scattered Clouds
7:56 AM 54.0 °F 50.0 °F 86% 29.87 in 10.0 mi WNW 6.9 mph - N/A   Mostly Cloudy
8:56 AM 55.9 °F 50.0 °F 80% 29.87 in 10.0 mi WNW 6.9 mph - N/A   Mostly Cloudy
9:27 AM 57.2 °F 51.8 °F 82% 29.87 in 10.0 mi NW 6.9 mph - N/A   Scattered Clouds
9:56 AM 60.1 °F 51.1 °F 72% 29.87 in 10.0 mi NW 9.2 mph - N/A   Partly Cloudy
10:56 AM 62.1 °F 51.1 °F 67% 29.88 in 10.0 mi NW 10.4 mph - N/A   Partly Cloudy
11:56 AM 63.0 °F 52.0 °F 67% 29.87 in 10.0 mi WNW 13.8 mph - N/A   Partly Cloudy
12:56 PM 63.0 °F 51.1 °F 65% 29.85 in 10.0 mi WNW 17.3 mph - N/A   Partly Cloudy
1:56 PM 64.0 °F 51.1 °F 63% 29.84 in 10.0 mi WNW 19.6 mph - N/A   Partly Cloudy
2:56 PM 64.9 °F 51.1 °F 61% 29.83 in 10.0 mi WNW 21.9 mph 27.6 mph N/A   Partly Cloudy
3:56 PM 64.0 °F 51.1 °F 63% 29.81 in 10.0 mi WNW 20.7 mph 27.6 mph N/A   Partly Cloudy
4:56 PM 63.0 °F 51.1 °F 65% 29.80 in 10.0 mi WNW 21.9 mph - N/A   Partly Cloudy
5:56 PM 61.0 °F 50.0 °F 67% 29.80 in 10.0 mi WNW 21.9 mph - N/A   Scattered Clouds
6:56 PM 59.0 °F 50.0 °F 72% 29.79 in 10.0 mi WNW 23.0 mph - N/A   Scattered Clouds
7:56 PM 55.9 °F 50.0 °F 80% 29.81 in 9.0 mi WNW 20.7 mph - N/A Fog Scattered Clouds
8:56 PM 55.9 °F 51.1 °F 84% 29.82 in 9.0 mi WNW 16.1 mph - N/A Fog Partly Cloudy
9:56 PM 55.9 °F 51.1 °F 84% 29.84 in 9.0 mi WNW 13.8 mph - N/A Fog Scattered Clouds
10:56 PM 55.0 °F 51.1 °F 86% 29.84 in 10.0 mi WNW 16.1 mph - N/A Fog Scattered Clouds
11:56 PM 55.0 °F 51.1 °F 86% 29.85 in 10.0 mi WNW 13.8 mph - N/A   Scattered Clouds