Weather History for San Francisco, CA

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Wednesday, August 20, 2014

  Actual Average Record
Temperature  
Mean Temperature 68 °F 65 °F  
Max Temperature 73 °F 73 °F 84 °F (1964)
Min Temperature 62 °F 56 °F 47 °F (1955)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 1 31  
Since 1 June heating degree days 69 201  
Since 1 July heating degree days 20 96  
Cooling Degree Days 3 1  
Month to date cooling degree days 42 20  
Year to date cooling degree days 223 84  
Since 1 June cooling degree days 160 65  
Growing Degree Days 18 (Base 50)    
Moisture  
Dew Point 58 °F    
Average Humidity 73    
Maximum Humidity 84    
Minimum Humidity 61    
Precipitation  
Precipitation 0.00 in 0.00 in 0.04 in (1997)
Month to date precipitation T 0.02  
Year to date precipitation 7.31 13.10  
Since 1 July precipitation T 0.02  
Sea Level Pressure  
Sea Level Pressure 29.90 in    
Wind  
Wind Speed 9 mph (SSW)    
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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Astronomy

Aug. 20, 2014 Rise Set
Actual Time 6:29 AM PDT 7:55 PM PDT
Civil Twilight 6:02 AM PDT 8:22 PM PDT
Nautical Twilight 5:29 AM PDT 8:55 PM PDT
Astronomical Twilight 4:54 AM PDT 9:30 PM PDT
Moon 2:16 AM PDT (8/20) 4:42 PM PDT (8/20)
Length of Visible Light 14h 20m
Length of Day
13h 25m
Waning Crescent, 20% of the Moon is Illuminated
Aug 20
Waning Crescent
Aug 25
New
Sep 2
First Quarter
Sep 8
Full
Sep 15
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 64.0 °F 57.9 °F 80% 29.86 in 10.0 mi West 4.6 mph - N/A   Scattered Clouds
1:56 AM 64.0 °F 57.9 °F 80% 29.86 in 10.0 mi South 4.6 mph - N/A   Scattered Clouds
2:56 AM 63.0 °F 57.9 °F 84% 29.87 in 10.0 mi South 5.8 mph - N/A   Clear
3:56 AM 63.0 °F 57.9 °F 84% 29.87 in 10.0 mi SSW 4.6 mph - N/A   Mostly Cloudy
4:56 AM 63.0 °F 57.9 °F 84% 29.86 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
5:56 AM 63.0 °F 57.9 °F 84% 29.87 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
6:56 AM 63.0 °F 57.0 °F 81% 29.89 in 10.0 mi SSW 11.5 mph - N/A   Overcast
7:56 AM 64.0 °F 57.0 °F 78% 29.90 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
8:56 AM 64.9 °F 57.0 °F 75% 29.91 in 10.0 mi SSW 10.4 mph - N/A   Mostly Cloudy
9:56 AM 66.0 °F 57.0 °F 73% 29.93 in 10.0 mi SSW 16.1 mph 21.9 mph N/A   Mostly Cloudy
10:56 AM 66.9 °F 57.9 °F 73% 29.94 in 10.0 mi SSE 17.3 mph 20.7 mph N/A   Mostly Cloudy
11:56 AM 69.1 °F 57.9 °F 68% 29.94 in 10.0 mi SSW 15.0 mph 23.0 mph N/A   Mostly Cloudy
12:56 PM 71.1 °F 57.9 °F 63% 29.94 in 10.0 mi SSW 17.3 mph 24.2 mph N/A   Scattered Clouds
1:56 PM 71.1 °F 59.0 °F 66% 29.93 in 10.0 mi SW 18.4 mph 28.8 mph N/A   Partly Cloudy
2:56 PM 72.0 °F 57.9 °F 61% 29.92 in 10.0 mi SSW 16.1 mph 24.2 mph N/A   Partly Cloudy
3:56 PM 71.1 °F 57.9 °F 63% 29.90 in 10.0 mi SSW 13.8 mph - N/A   Partly Cloudy
4:56 PM 72.0 °F 57.9 °F 61% 29.89 in 10.0 mi SSW 10.4 mph 19.6 mph N/A   Partly Cloudy
5:56 PM 70.0 °F 57.9 °F 65% 29.89 in 10.0 mi South 12.7 mph - N/A   Partly Cloudy
6:56 PM 69.1 °F 57.0 °F 65% 29.88 in 10.0 mi SSW 9.2 mph - N/A   Partly Cloudy
7:56 PM 66.0 °F 57.0 °F 73% 29.88 in 10.0 mi South 3.5 mph - N/A   Partly Cloudy
8:56 PM 64.0 °F 57.0 °F 78% 29.90 in 10.0 mi South 4.6 mph - N/A   Partly Cloudy
9:56 PM 63.0 °F 57.0 °F 81% 29.91 in 10.0 mi Calm Calm - N/A   Partly Cloudy
10:56 PM 63.0 °F 57.0 °F 81% 29.91 in 10.0 mi NW 4.6 mph - N/A   Partly Cloudy
11:56 PM 62.1 °F 57.9 °F 86% 29.91 in 10.0 mi WNW 5.8 mph - N/A   Partly Cloudy