Weather History for KSFO - September, 2013

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Monday, September 9, 2013

  Actual Average Record
Temperature  
Mean Temperature 66 °F 65 °F  
Max Temperature 76 °F 74 °F 92 °F (1951)
Min Temperature 55 °F 56 °F 46 °F (1946)
Degree Days  
Heating Degree Days 0 2  
Month to date heating degree days 0 18  
Since 1 July heating degree days 115 131  
Cooling Degree Days 1 2  
Month to date cooling degree days 26 18  
Year to date cooling degree days 126 115  
Growing Degree Days 15 (Base 50)    
Moisture  
Dew Point 55 °F    
Average Humidity 70    
Maximum Humidity 90    
Minimum Humidity 50    
Precipitation  
Precipitation 0.00 in 0.01 in 0.26 in (1978)
Month to date precipitation 0.00 0.03  
Year to date precipitation 1.89 13.15  
Since 1 July precipitation T 0.07  
Sea Level Pressure  
Sea Level Pressure 29.77 in    
Wind  
Wind Speed 11 mph (WNW)    
Max Wind Speed 26 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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Date:

Astronomy

Sep. 09, 2013 Rise Set
Actual Time 6:46 AM PDT 7:25 PM PDT
Civil Twilight 6:20 AM PDT 7:52 PM PDT
Nautical Twilight 5:48 AM PDT 8:23 PM PDT
Astronomical Twilight 5:16 AM PDT 8:55 PM PDT
Moon 11:07 AM PDT (9/9) 9:52 PM PDT (9/9)
Length of Visible Light 13h 32m
Length of Day
12h 39m
Waxing Crescent, 20% of the Moon is Illuminated
Sep 9
Waxing Crescent
Sep 12
First Quarter
Sep 19
Full
Sep 26
Last Quarter
Oct 4
New

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 57.2 °F 53.6 °F 88% 29.81 in 10.0 mi West 9.2 mph - N/A   Scattered Clouds
1:56 AM 57.2 °F 53.6 °F 88% 29.80 in 10.0 mi WNW 6.9 mph - N/A   Scattered Clouds
2:56 AM 57.2 °F 53.6 °F 88% 29.80 in 10.0 mi WNW 10.4 mph - N/A   Scattered Clouds
3:56 AM 57.0 °F 53.1 °F 87% 29.78 in 10.0 mi WNW 10.4 mph - N/A   Clear
4:56 AM 55.4 °F 51.8 °F 88% 29.79 in 10.0 mi WNW 6.9 mph - N/A   Scattered Clouds
5:56 AM 55.4 °F 51.8 °F 88% 29.80 in 10.0 mi WNW 9.2 mph - N/A   Scattered Clouds
6:56 AM 55.9 °F 52.0 °F 87% 29.81 in 10.0 mi West 9.2 mph - N/A   Scattered Clouds
7:56 AM 57.0 °F 54.0 °F 89% 29.82 in 10.0 mi WNW 8.1 mph - N/A   Partly Cloudy
8:56 AM 61.0 °F 54.0 °F 78% 29.82 in 10.0 mi NW 5.8 mph - N/A   Partly Cloudy
9:56 AM 64.9 °F 55.0 °F 70% 29.82 in 10.0 mi NNE 3.5 mph - N/A   Partly Cloudy
10:56 AM 66.9 °F 55.9 °F 68% 29.81 in 10.0 mi ENE 4.6 mph - N/A   Partly Cloudy
11:56 AM 71.1 °F 57.9 °F 63% 29.80 in 10.0 mi NNW 5.8 mph - N/A   Partly Cloudy
12:56 PM 71.1 °F 55.0 °F 57% 29.78 in 10.0 mi NW 15.0 mph - N/A   Partly Cloudy
1:56 PM 75.9 °F 55.0 °F 48% 29.76 in 10.0 mi WNW 12.7 mph - N/A   Partly Cloudy
2:56 PM 72.0 °F 55.0 °F 55% 29.74 in 10.0 mi WNW 20.7 mph - N/A   Partly Cloudy
3:56 PM 68.0 °F 55.9 °F 65% 29.73 in 10.0 mi WNW 20.7 mph 29.9 mph N/A   Partly Cloudy
4:56 PM 69.1 °F 55.9 °F 63% 29.72 in 10.0 mi NW 20.7 mph - N/A   Partly Cloudy
5:56 PM 64.9 °F 57.0 °F 75% 29.72 in 10.0 mi WNW 18.4 mph - N/A   Partly Cloudy
6:56 PM 63.0 °F 57.0 °F 81% 29.72 in 10.0 mi NW 18.4 mph - N/A   Partly Cloudy
7:56 PM 62.1 °F 57.9 °F 86% 29.73 in 10.0 mi WNW 15.0 mph - N/A   Partly Cloudy
8:56 PM 61.0 °F 57.0 °F 87% 29.75 in 10.0 mi NW 15.0 mph - N/A   Partly Cloudy
9:56 PM 61.0 °F 57.0 °F 87% 29.76 in 10.0 mi WNW 11.5 mph - N/A   Partly Cloudy
10:56 PM 60.1 °F 57.0 °F 90% 29.76 in 10.0 mi WNW 9.2 mph - N/A   Partly Cloudy
11:56 PM 60.1 °F 57.0 °F 90% 29.75 in 10.0 mi WNW 9.2 mph - N/A   Partly Cloudy