San Francisco, CA

5:01 PM PDT on May 25, 2017 (GMT -0700)
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Weather History for KSFO - September, 2012

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Tuesday, September 4, 2012

  Actual Average Record
Temperature  
Mean Temperature 58 °F 65 °F  
Max Temperature 64 °F 74 °F 92 °F (1961)
Min Temperature 51 °F 56 °F 50 °F (1989)
Degree Days  
Heating Degree Days 7 2  
Month to date heating degree days 15 8  
Since 1 July heating degree days 195 121  
Cooling Degree Days 0 2  
Month to date cooling degree days 0 8  
Year to date cooling degree days 34 105  
Growing Degree Days 7 (Base 50)    
Moisture  
Dew Point 50 °F    
Average Humidity 75    
Maximum Humidity 89    
Minimum Humidity 60    
Precipitation  
Precipitation 0.00 in 0.00 in 0.20 in (1876)
Month to date precipitation 0.00 0.01  
Year to date precipitation 10.46 13.13  
Since 1 July precipitation T  
Sea Level Pressure  
Sea Level Pressure 30.00 in    
Wind  
Wind Speed 14 mph (WNW)    
Max Wind Speed 26 mph    
Max Gust Speed 31 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 04, 2012 Rise Set
Actual Time 6:42 AM PDT 7:33 PM PDT
Civil Twilight 6:16 AM PDT 7:59 PM PDT
Nautical Twilight 5:44 AM PDT 8:31 PM PDT
Astronomical Twilight 5:11 AM PDT 9:03 PM PDT
Moon 9:36 PM PDT (9/4) 10:48 AM PDT (9/4)
Length of Visible Light 13h 43m
Length of Day
12h 50m
Waning Gibbous, 83% of the Moon is Illuminated
Sep 4
Waning Gibbous
Sep 8
Last Quarter
Sep 15
New
Sep 22
First Quarter
Sep 29
Full

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 53.1 °F 48.9 °F 86% 29.99 in 10.0 mi WNW 12.7 mph - N/A   Partly Cloudy
1:56 AM 53.1 °F 48.9 °F 86% 29.99 in 10.0 mi WNW 11.5 mph - N/A   Partly Cloudy
2:56 AM 52.0 °F 48.0 °F 86% 29.99 in 10.0 mi WNW 11.5 mph - N/A   Partly Cloudy
3:56 AM 52.0 °F 48.0 °F 86% 29.99 in 10.0 mi WNW 11.5 mph - N/A   Partly Cloudy
4:56 AM 52.0 °F 48.0 °F 86% 30.00 in 10.0 mi WNW 10.4 mph - N/A   Partly Cloudy
5:56 AM 52.0 °F 48.9 °F 89% 30.01 in 10.0 mi WNW 8.1 mph - N/A   Scattered Clouds
6:56 AM 52.0 °F 48.9 °F 89% 30.02 in 10.0 mi WNW 9.2 mph - N/A   Partly Cloudy
7:56 AM 54.0 °F 50.0 °F 86% 30.03 in 10.0 mi WNW 9.2 mph - N/A   Partly Cloudy
8:56 AM 55.4 °F 50.0 °F 82% 30.03 in 10.0 mi NW 5.8 mph - N/A   Clear
8:58 AM 55.4 °F 50.0 °F 82% 30.03 in 10.0 mi NW 9.2 mph - N/A   Partly Cloudy
9:56 AM 57.9 °F 50.0 °F 75% 30.04 in 10.0 mi NW 6.9 mph - N/A   Partly Cloudy
10:56 AM 61.0 °F 50.0 °F 67% 30.04 in 10.0 mi NW 6.9 mph - N/A   Partly Cloudy
11:56 AM 63.0 °F 51.1 °F 65% 30.03 in 10.0 mi NW 11.5 mph - N/A   Partly Cloudy
12:56 PM 63.0 °F 51.1 °F 65% 30.01 in 10.0 mi WNW 17.3 mph - N/A   Partly Cloudy
1:56 PM 64.0 °F 50.0 °F 60% 30.00 in 10.0 mi WNW 19.6 mph 26.5 mph N/A   Partly Cloudy
2:56 PM 63.0 °F 50.0 °F 63% 29.99 in 10.0 mi WNW 23.0 mph - N/A   Partly Cloudy
3:56 PM 63.0 °F 51.1 °F 65% 29.98 in 10.0 mi WNW 21.9 mph - N/A   Partly Cloudy
4:56 PM 62.1 °F 52.0 °F 70% 29.97 in 10.0 mi WNW 24.2 mph - N/A   Partly Cloudy
5:56 PM 60.1 °F 52.0 °F 75% 29.97 in 10.0 mi West 25.3 mph - N/A   Partly Cloudy
6:56 PM 57.9 °F 52.0 °F 81% 29.97 in 10.0 mi WNW 23.0 mph - N/A   Scattered Clouds
7:56 PM 57.0 °F 52.0 °F 83% 29.98 in 10.0 mi WNW 18.4 mph - N/A   Scattered Clouds
8:56 PM 55.4 °F 51.8 °F 88% 29.99 in 10.0 mi West 17.3 mph - N/A   Scattered Clouds
9:56 PM 55.9 °F 52.0 °F 87% 30.00 in 10.0 mi WNW 12.7 mph - N/A   Scattered Clouds
10:56 PM 55.0 °F 51.1 °F 86% 30.01 in 10.0 mi WNW 12.7 mph - N/A   Scattered Clouds
11:56 PM 55.0 °F 51.1 °F 86% 30.00 in 10.0 mi WNW 10.4 mph - N/A   Scattered Clouds