San Francisco, CA

8:25 PM PST on December 03, 2016 (GMT -0800)
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Weather History for KSFO - September, 2012

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Thursday, September 20, 2012

  Actual Average Record
Temperature  
Mean Temperature 59 °F 65 °F  
Max Temperature 64 °F 74 °F 93 °F (1990)
Min Temperature 54 °F 56 °F 48 °F (1965)
Degree Days  
Heating Degree Days 6 2  
Month to date heating degree days 87 40  
Since 1 July heating degree days 267 153  
Cooling Degree Days 0 1  
Month to date cooling degree days 0 35  
Year to date cooling degree days 34 132  
Growing Degree Days 8 (Base 50)    
Moisture  
Dew Point 48 °F    
Average Humidity 70    
Maximum Humidity 83    
Minimum Humidity 56    
Precipitation  
Precipitation 0.00 in 0.00 in 0.08 in (2005)
Month to date precipitation 0.00 0.08  
Year to date precipitation 10.46 13.20  
Since 1 July precipitation T  
Sea Level Pressure  
Sea Level Pressure 30.05 in    
Wind  
Wind Speed 17 mph (West)    
Max Wind Speed 28 mph    
Max Gust Speed 33 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 20, 2012 Rise Set
Actual Time 6:56 AM PDT 7:08 PM PDT
Civil Twilight 6:29 AM PDT 7:34 PM PDT
Nautical Twilight 5:59 AM PDT 8:05 PM PDT
Astronomical Twilight 5:28 AM PDT 8:36 PM PDT
Moon 12:13 PM PDT (9/20) 10:22 PM PDT (9/20)
Length of Visible Light 13h 04m
Length of Day
12h 12m
Waxing Crescent, 28% of the Moon is Illuminated
Sep 20
Waxing Crescent
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter
Oct 15
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 55.9 °F 48.0 °F 75% 30.09 in 10.0 mi West 9.2 mph - N/A   Mostly Cloudy
1:56 AM 55.9 °F 48.9 °F 77% 30.09 in 10.0 mi West 15.0 mph 19.6 mph N/A   Mostly Cloudy
2:56 AM 55.9 °F 48.9 °F 77% 30.08 in 10.0 mi West 11.5 mph - N/A   Mostly Cloudy
3:56 AM 55.9 °F 48.9 °F 77% 30.07 in 10.0 mi West 13.8 mph - N/A   Mostly Cloudy
4:56 AM 55.0 °F 48.0 °F 77% 30.06 in 10.0 mi West 17.3 mph 25.3 mph N/A   Mostly Cloudy
5:56 AM 55.0 °F 48.0 °F 77% 30.06 in 10.0 mi West 12.7 mph 23.0 mph N/A   Mostly Cloudy
6:56 AM 54.0 °F 48.0 °F 80% 30.06 in 10.0 mi West 13.8 mph - N/A   Mostly Cloudy
7:56 AM 55.0 °F 48.0 °F 77% 30.08 in 10.0 mi West 15.0 mph 19.6 mph N/A   Scattered Clouds
8:56 AM 57.9 °F 48.0 °F 70% 30.09 in 10.0 mi West 15.0 mph - N/A   Scattered Clouds
9:56 AM 57.9 °F 48.0 °F 70% 30.09 in 10.0 mi West 17.3 mph - N/A   Scattered Clouds
10:56 AM 61.0 °F 48.9 °F 64% 30.09 in 10.0 mi WNW 15.0 mph - N/A   Partly Cloudy
11:56 AM 61.0 °F 48.9 °F 64% 30.08 in 10.0 mi WNW 15.0 mph - N/A   Partly Cloudy
12:56 PM 62.6 °F 48.2 °F 59% 30.06 in 10.0 mi WNW 18.4 mph - N/A   Partly Cloudy
1:56 PM 63.0 °F 48.0 °F 58% 30.05 in 10.0 mi WNW 23.0 mph - N/A   Partly Cloudy
2:56 PM 63.0 °F 48.0 °F 58% 30.05 in 10.0 mi West 21.9 mph 27.6 mph N/A   Scattered Clouds
3:56 PM 63.0 °F 46.9 °F 56% 30.03 in 10.0 mi West 20.7 mph 31.1 mph N/A   Scattered Clouds
4:56 PM 63.0 °F 46.9 °F 56% 30.01 in 10.0 mi West 23.0 mph - N/A   Scattered Clouds
5:56 PM 61.0 °F 46.9 °F 60% 30.01 in 10.0 mi West 25.3 mph 32.2 mph N/A   Scattered Clouds
6:56 PM 59.0 °F 46.9 °F 64% 30.01 in 10.0 mi West 21.9 mph - N/A   Mostly Cloudy
7:56 PM 57.9 °F 46.9 °F 67% 30.00 in 10.0 mi West 23.0 mph 31.1 mph N/A   Scattered Clouds
8:56 PM 57.9 °F 46.9 °F 67% 30.01 in 10.0 mi West 19.6 mph - N/A   Partly Cloudy
9:56 PM 57.0 °F 46.9 °F 69% 30.02 in 10.0 mi West 13.8 mph - N/A   Partly Cloudy
10:56 PM 55.9 °F 46.9 °F 72% 30.02 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy
11:56 PM 55.9 °F 46.9 °F 72% 30.02 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy