Weather History for KSFO - August, 2013

Change the Weather History Date:

Tuesday, August 20, 2013

  Actual Average Record
Temperature  
Mean Temperature 68 °F 65 °F  
Max Temperature 76 °F 73 °F 84 °F (1964)
Min Temperature 59 °F 56 °F 47 °F (1955)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 31 31  
Since 1 June heating degree days 197 201  
Since 1 July heating degree days 109 96  
Cooling Degree Days 3 1  
Month to date cooling degree days 16 20  
Year to date cooling degree days 88 84  
Since 1 June cooling degree days 61 65  
Growing Degree Days 17 (Base 50)    
Moisture  
Dew Point 55 °F    
Average Humidity 69    
Maximum Humidity 87    
Minimum Humidity 50    
Precipitation  
Precipitation 0.00 in 0.00 in 0.04 in (1997)
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 29.87 in    
Wind  
Wind Speed 8 mph (NW)    
Max Wind Speed 20 mph    
Max Gust Speed 23 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

Search for Another Location

Airport or City:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

Aug. 20, 2013 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 9:29 PM PDT
Moon 7:31 PM PDT (8/20) 6:05 AM PDT (8/20)
Length of Visible Light 14h 20m
Length of Day
13h 25m
Full, 100% of the Moon is Illuminated
Aug 20
Full
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 60.1 °F 55.0 °F 83% 29.88 in 10.0 mi WNW 12.7 mph - N/A   Mostly Cloudy
1:56 AM 60.1 °F 55.0 °F 83% 29.86 in 10.0 mi WNW 16.1 mph - N/A   Mostly Cloudy
2:56 AM 59.0 °F 55.0 °F 87% 29.85 in 10.0 mi WNW 12.7 mph - N/A   Mostly Cloudy
3:56 AM 59.0 °F 55.0 °F 87% 29.86 in 10.0 mi WNW 11.5 mph - N/A   Mostly Cloudy
4:56 AM 59.0 °F 55.0 °F 87% 29.86 in 10.0 mi WNW 6.9 mph - N/A   Mostly Cloudy
5:56 AM 60.1 °F 54.0 °F 80% 29.87 in 10.0 mi Variable 4.6 mph - N/A   Scattered Clouds
6:56 AM 60.1 °F 54.0 °F 80% 29.88 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:56 AM 60.1 °F 54.0 °F 80% 29.89 in 10.0 mi Calm Calm - N/A   Partly Cloudy
8:56 AM 64.0 °F 55.9 °F 75% 29.90 in 10.0 mi Calm Calm - N/A   Scattered Clouds
9:56 AM 68.0 °F 57.2 °F 68% 29.90 in 10.0 mi NNE 5.8 mph - N/A   Partly Cloudy
10:56 AM 66.2 °F 57.2 °F 73% 29.90 in 10.0 mi NE 8.1 mph - N/A   Partly Cloudy
11:56 AM 69.1 °F 57.9 °F 68% 29.90 in 10.0 mi NNE 8.1 mph - N/A   Partly Cloudy
12:56 PM 69.1 °F 57.9 °F 68% 29.89 in 10.0 mi NNE 10.4 mph - N/A   Partly Cloudy
1:56 PM 72.0 °F 57.9 °F 61% 29.88 in 10.0 mi NNE 8.1 mph - N/A   Partly Cloudy
2:56 PM 73.0 °F 57.0 °F 57% 29.86 in 10.0 mi NE 4.6 mph - N/A   Partly Cloudy
3:56 PM 75.0 °F 55.9 °F 51% 29.83 in 10.0 mi NNW 9.2 mph - N/A   Partly Cloudy
4:56 PM 73.0 °F 55.0 °F 53% 29.83 in 10.0 mi WNW 11.5 mph - N/A   Partly Cloudy
5:56 PM 70.0 °F 54.0 °F 57% 29.83 in 10.0 mi NW 13.8 mph - N/A   Partly Cloudy
6:56 PM 66.0 °F 54.0 °F 65% 29.84 in 10.0 mi NW 12.7 mph - N/A   Partly Cloudy
7:56 PM 63.0 °F 53.1 °F 70% 29.86 in 10.0 mi WNW 11.5 mph - N/A   Partly Cloudy
8:56 PM 63.0 °F 53.1 °F 70% 29.88 in 10.0 mi WNW 5.8 mph - N/A   Partly Cloudy
9:56 PM 61.0 °F 53.1 °F 75% 29.89 in 10.0 mi West 9.2 mph - N/A   Partly Cloudy
10:56 PM 61.0 °F 53.1 °F 75% 29.89 in 10.0 mi WNW 8.1 mph - N/A   Partly Cloudy
11:56 PM 60.1 °F 53.1 °F 78% 29.90 in 10.0 mi WNW 8.1 mph - N/A   Partly Cloudy