Weather History for San Francisco, CA

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Saturday, August 17, 2013

  Actual Average Record
Temperature  
Mean Temperature 66 °F 64 °F  
Max Temperature 72 °F 73 °F 85 °F (1939)
Min Temperature 59 °F 56 °F 44 °F (1935)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 31 28  
Since 1 June heating degree days 197 198  
Since 1 July heating degree days 109 93  
Cooling Degree Days 1 1  
Month to date cooling degree days 8 17  
Year to date cooling degree days 80 81  
Since 1 June cooling degree days 53 62  
Growing Degree Days 16 (Base 50)    
Moisture  
Dew Point 55 °F    
Average Humidity 71    
Maximum Humidity 84    
Minimum Humidity 57    
Precipitation  
Precipitation 0.00 in 0.00 in 0.03 in (1976)
Month to date precipitation T 0.02  
Year to date precipitation 1.89 13.10  
Since 1 July precipitation T 0.02  
Sea Level Pressure  
Sea Level Pressure 29.95 in    
Wind  
Wind Speed 13 mph (WNW)    
Max Wind Speed 29 mph    
Max Gust Speed 35 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Aug. 17, 2013 Rise Set
Actual Time 6:27 AM PDT 7:58 PM PDT
Civil Twilight 5:59 AM PDT 8:26 PM PDT
Nautical Twilight 5:26 AM PDT 8:59 PM PDT
Astronomical Twilight 4:50 AM PDT 9:34 PM PDT
Moon 5:17 PM PDT (8/17) 2:38 AM PDT (8/17)
Length of Visible Light 14h 27m
Length of Day
13h 31m
Waxing Gibbous, 85% of the Moon is Illuminated
Aug 17
Waxing Gibbous
Aug 20
Full
Aug 28
Last Quarter
Sep 5
New
Sep 12
First 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 59.0 °F 54.0 °F 83% 29.99 in 10.0 mi West 6.9 mph - N/A   Partly Cloudy
1:56 AM 59.0 °F 53.1 °F 81% 29.98 in 10.0 mi WNW 3.5 mph - N/A   Partly Cloudy
2:56 AM 59.0 °F 53.1 °F 81% 29.97 in 10.0 mi West 6.9 mph - N/A   Partly Cloudy
3:56 AM 59.0 °F 53.1 °F 81% 29.97 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
4:56 AM 59.0 °F 53.1 °F 81% 29.97 in 10.0 mi West 11.5 mph - N/A   Partly Cloudy
5:56 AM 59.0 °F 54.0 °F 83% 29.97 in 10.0 mi WNW 5.8 mph - N/A   Mostly Cloudy
6:56 AM 59.0 °F 54.0 °F 83% 29.98 in 10.0 mi WNW 10.4 mph - N/A   Mostly Cloudy
7:56 AM 61.0 °F 55.0 °F 81% 30.00 in 10.0 mi WNW 6.9 mph - N/A   Mostly Cloudy
8:56 AM 62.1 °F 55.0 °F 78% 29.99 in 10.0 mi WNW 10.4 mph - N/A   Mostly Cloudy
9:56 AM 64.9 °F 55.0 °F 70% 29.99 in 10.0 mi WNW 8.1 mph - N/A   Mostly Cloudy
10:56 AM 66.0 °F 55.0 °F 68% 30.00 in 10.0 mi WNW 13.8 mph - N/A   Mostly Cloudy
11:56 AM 64.9 °F 54.0 °F 68% 30.00 in 10.0 mi WNW 11.5 mph - N/A   Mostly Cloudy
12:56 PM 69.1 °F 54.0 °F 58% 29.97 in 10.0 mi West 20.7 mph 27.6 mph N/A   Mostly Cloudy
1:56 PM 69.1 °F 55.0 °F 61% 29.96 in 10.0 mi West 21.9 mph 31.1 mph N/A   Mostly Cloudy
2:56 PM 70.0 °F 55.9 °F 61% 29.94 in 10.0 mi West 24.2 mph - N/A   Overcast
3:49 PM 68.0 °F 55.4 °F 64% 29.94 in 10.0 mi West 19.6 mph 26.5 mph N/A   Overcast
3:56 PM 68.0 °F 57.0 °F 68% 29.94 in 10.0 mi West 17.3 mph 26.5 mph N/A   Overcast
4:56 PM 68.0 °F 57.0 °F 68% 29.91 in 10.0 mi West 20.7 mph 27.6 mph N/A   Mostly Cloudy
5:56 PM 64.9 °F 57.0 °F 75% 29.91 in 10.0 mi WNW 12.7 mph 24.2 mph N/A   Mostly Cloudy
6:56 PM 64.0 °F 55.9 °F 75% 29.90 in 10.0 mi West 16.1 mph - N/A   Mostly Cloudy
7:36 PM 62.6 °F 55.4 °F 77% 29.91 in 10.0 mi West 11.5 mph 19.6 mph N/A   Mostly Cloudy
7:56 PM 62.1 °F 55.9 °F 80% 29.91 in 10.0 mi West 17.3 mph - N/A   Mostly Cloudy
8:25 PM 60.8 °F 55.4 °F 82% 29.90 in 10.0 mi WNW 11.5 mph - N/A   Scattered Clouds
8:56 PM 61.0 °F 55.9 °F 83% 29.92 in 10.0 mi West 13.8 mph - N/A   Mostly Cloudy
9:56 PM 61.0 °F 55.0 °F 81% 29.92 in 10.0 mi WNW 13.8 mph - N/A   Scattered Clouds
10:56 PM 60.1 °F 55.0 °F 83% 29.91 in 10.0 mi WNW 11.5 mph - N/A   Scattered Clouds
11:56 PM 60.1 °F 55.0 °F 83% 29.89 in 10.0 mi WNW 4.6 mph - N/A   Partly Cloudy