Weather History for KSFO - September, 2013

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Thursday, September 26, 2013

  Actual Average Record
Temperature  
Mean Temperature 62 °F 64 °F  
Max Temperature 71 °F 73 °F 95 °F (1958)
Min Temperature 53 °F 55 °F 46 °F (1948)
Degree Days  
Heating Degree Days 3 2  
Month to date heating degree days 18 52  
Since 1 July heating degree days 133 165  
Cooling Degree Days 0 1  
Month to date cooling degree days 37 41  
Year to date cooling degree days 137 138  
Growing Degree Days 12 (Base 50)    
Moisture  
Dew Point 43 °F    
Average Humidity 53    
Maximum Humidity 72    
Minimum Humidity 33    
Precipitation  
Precipitation 0.00 in 0.01 in 0.27 in (1972)
Month to date precipitation 0.23 0.13  
Year to date precipitation 2.12 13.25  
Since 1 July precipitation 0.23 0.17  
Sea Level Pressure  
Sea Level Pressure 29.92 in    
Wind  
Wind Speed 11 mph (West)    
Max Wind Speed 24 mph    
Max Gust Speed 29 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 26, 2013 Rise Set
Actual Time 7:00 AM PDT 6:59 PM PDT
Civil Twilight 6:34 AM PDT 7:25 PM PDT
Nautical Twilight 6:04 AM PDT 7:56 PM PDT
Astronomical Twilight 5:33 AM PDT 8:26 PM PDT
Moon No Moon Rise 1:51 PM PDT (9/26)
Length of Visible Light 12h 50m
Length of Day
11h 58m
Waning Gibbous, 53% of the Moon is Illuminated
Sep 26
Waning Gibbous
Sep 26
Last Quarter
Oct 4
New
Oct 11
First Quarter
Oct 18
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 55.9 °F 46.0 °F 69% 29.85 in 10.0 mi West 9.2 mph - N/A   Clear
1:56 AM 55.9 °F 44.1 °F 64% 29.85 in 10.0 mi West 12.7 mph - N/A   Clear
2:56 AM 55.0 °F 44.1 °F 67% 29.86 in 10.0 mi West 10.4 mph - N/A   Clear
3:56 AM 54.0 °F 44.1 °F 69% 29.86 in 10.0 mi West 10.4 mph - N/A   Clear
4:56 AM 54.0 °F 43.0 °F 66% 29.87 in 10.0 mi West 11.5 mph - N/A   Clear
5:56 AM 54.0 °F 42.1 °F 64% 29.88 in 10.0 mi West 8.1 mph - N/A   Clear
6:56 AM 54.0 °F 42.1 °F 64% 29.89 in 10.0 mi West 9.2 mph - N/A   Clear
7:56 AM 55.9 °F 44.1 °F 64% 29.91 in 10.0 mi West 11.5 mph - N/A   Clear
8:56 AM 60.1 °F 43.0 °F 53% 29.93 in 10.0 mi West 10.4 mph - N/A   Clear
9:56 AM 63.0 °F 39.0 °F 41% 29.95 in 10.0 mi West 12.7 mph - N/A   Clear
10:56 AM 66.9 °F 37.9 °F 34% 29.94 in 10.0 mi North 4.6 mph - N/A   Clear
11:56 AM 68.0 °F 41.0 °F 37% 29.93 in 10.0 mi NE 4.6 mph - N/A   Clear
12:56 PM 69.1 °F 39.9 °F 35% 29.93 in 10.0 mi WNW 15.0 mph - N/A   Clear
1:56 PM 68.0 °F 39.0 °F 35% 29.93 in 10.0 mi WNW 13.8 mph - N/A   Clear
2:56 PM 66.9 °F 41.0 °F 39% 29.91 in 10.0 mi WNW 19.6 mph - N/A   Partly Cloudy
3:56 PM 66.0 °F 42.1 °F 42% 29.91 in 10.0 mi West 21.9 mph - N/A   Partly Cloudy
4:56 PM 64.9 °F 45.0 °F 48% 29.91 in 10.0 mi West 20.7 mph - N/A   Partly Cloudy
5:56 PM 63.0 °F 46.0 °F 54% 29.91 in 10.0 mi West 19.6 mph - N/A   Partly Cloudy
6:56 PM 60.1 °F 46.0 °F 60% 29.92 in 10.0 mi West 18.4 mph - N/A   Clear
7:56 PM 59.0 °F 46.0 °F 62% 29.94 in 10.0 mi West 11.5 mph - N/A   Clear
8:56 PM 59.0 °F 45.0 °F 60% 29.95 in 10.0 mi West 10.4 mph - N/A   Clear
9:56 PM 57.9 °F 45.0 °F 62% 29.98 in 10.0 mi SW 3.5 mph - N/A   Clear
10:56 PM 60.1 °F 43.0 °F 53% 29.98 in 10.0 mi Calm Calm - N/A   Clear
11:56 PM 57.9 °F 44.1 °F 60% 29.99 in 10.0 mi West 4.6 mph - N/A   Clear