Weather History for San Francisco, CA

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Thursday, September 13, 2012

  Actual Average Record
Temperature  
Mean Temperature 60 °F 65 °F  
Max Temperature 66 °F 74 °F 101 °F (1971)
Min Temperature 53 °F 56 °F 47 °F (1947)
Degree Days  
Heating Degree Days 5 2  
Month to date heating degree days 48 26  
Since 1 July heating degree days 228 139  
Cooling Degree Days 0 2  
Month to date cooling degree days 0 26  
Year to date cooling degree days 34 123  
Growing Degree Days 10 (Base 50)    
Moisture  
Dew Point 52 °F    
Average Humidity 76    
Maximum Humidity 93    
Minimum Humidity 58    
Precipitation  
Precipitation 0.00 in 0.00 in 0.27 in (2009)
Month to date precipitation 0.00 0.04  
Year to date precipitation 10.46 13.16  
Since 1 July precipitation T 0.08  
Sea Level Pressure  
Sea Level Pressure 30.07 in    
Wind  
Wind Speed 14 mph (WNW)    
Max Wind Speed 28 mph    
Max Gust Speed 33 mph    
Visibility 9 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 13, 2012 Rise Set
Actual Time 6:50 AM PDT 7:19 PM PDT
Civil Twilight 6:23 AM PDT 7:45 PM PDT
Nautical Twilight 5:52 AM PDT 8:16 PM PDT
Astronomical Twilight 5:21 AM PDT 8:48 PM PDT
Moon 4:17 AM PDT (9/13) 5:44 PM PDT (9/13)
Length of Visible Light 13h 21m
Length of Day
12h 29m
Waning Crescent, 7% of the Moon is Illuminated
Sep 13
Waning Crescent
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 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 55.9 °F 52.0 °F 87% 30.05 in 6.0 mi WNW 13.8 mph - N/A   Mostly Cloudy
1:56 AM 55.4 °F 51.8 °F 88% 30.06 in 9.0 mi WNW 9.2 mph - N/A   Scattered Clouds
2:13 AM 55.4 °F 51.8 °F 88% 30.05 in 9.0 mi WNW 9.2 mph - N/A   Scattered Clouds
2:56 AM 55.4 °F 52.0 °F 88% 30.05 in 8.0 mi WNW 9.2 mph - N/A   Scattered Clouds
3:56 AM 54.0 °F 51.1 °F 90% 30.06 in 10.0 mi WNW 9.2 mph - N/A   Scattered Clouds
4:56 AM 54.0 °F 51.1 °F 90% 30.06 in 10.0 mi WNW 9.2 mph - N/A   Scattered Clouds
5:56 AM 53.1 °F 51.1 °F 93% 30.07 in 10.0 mi WNW 9.2 mph - N/A   Scattered Clouds
6:56 AM 54.0 °F 51.1 °F 90% 30.08 in 8.0 mi WNW 9.2 mph - N/A   Scattered Clouds
7:56 AM 55.0 °F 52.0 °F 89% 30.09 in 7.0 mi WNW 11.5 mph - N/A   Scattered Clouds
8:56 AM 57.0 °F 52.0 °F 83% 30.10 in 8.0 mi WNW 5.8 mph - N/A   Scattered Clouds
9:56 AM 60.1 °F 53.1 °F 78% 30.10 in 8.0 mi NNW 4.6 mph - N/A   Mostly Cloudy
10:56 AM 63.0 °F 53.1 °F 70% 30.11 in 10.0 mi NW 10.4 mph - N/A   Mostly Cloudy
11:56 AM 63.0 °F 52.0 °F 67% 30.10 in 10.0 mi WNW 13.8 mph - N/A   Mostly Cloudy
12:56 PM 64.0 °F 52.0 °F 65% 30.08 in 10.0 mi WNW 18.4 mph - N/A   Mostly Cloudy
1:56 PM 66.0 °F 52.0 °F 60% 30.06 in 10.0 mi WNW 18.4 mph - N/A   Mostly Cloudy
2:56 PM 64.9 °F 52.0 °F 63% 30.03 in 10.0 mi WNW 19.6 mph 25.3 mph N/A   Mostly Cloudy
3:56 PM 63.0 °F 51.1 °F 65% 30.02 in 10.0 mi WNW 24.2 mph 32.2 mph N/A   Mostly Cloudy
4:56 PM 62.1 °F 52.0 °F 70% 30.02 in 10.0 mi WNW 21.9 mph - N/A   Mostly Cloudy
5:56 PM 60.1 °F 51.1 °F 72% 30.03 in 10.0 mi WNW 20.7 mph - N/A   Mostly Cloudy
6:56 PM 59.0 °F 51.1 °F 75% 30.03 in 10.0 mi WNW 21.9 mph - N/A   Mostly Cloudy
7:56 PM 57.0 °F 51.1 °F 81% 30.05 in 10.0 mi WNW 20.7 mph 25.3 mph N/A   Scattered Clouds
8:56 PM 57.0 °F 51.1 °F 81% 30.07 in 10.0 mi West 17.3 mph - N/A   Partly Cloudy
9:56 PM 57.0 °F 51.1 °F 81% 30.09 in 10.0 mi WNW 18.4 mph - N/A   Partly Cloudy
10:56 PM 55.9 °F 52.0 °F 87% 30.09 in 10.0 mi WNW 17.3 mph - N/A   Scattered Clouds
11:56 PM 55.9 °F 51.1 °F 84% 30.08 in 10.0 mi WNW 15.0 mph - N/A   Partly Cloudy