Weather History for San Francisco, CA

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Thursday, October 18, 2012

  Actual Average Record
Temperature  
Mean Temperature 72 °F 62 °F  
Max Temperature 86 °F 70 °F 86 °F (2012)
Min Temperature 58 °F 53 °F 42 °F (1946)
Degree Days  
Heating Degree Days 0 4  
Month to date heating degree days 32 57  
Since 1 July heating degree days 338 223  
Cooling Degree Days 7 1  
Month to date cooling degree days 42 18  
Year to date cooling degree days 78 159  
Growing Degree Days 22 (Base 50)    
Moisture  
Dew Point 52 °F    
Average Humidity 50    
Maximum Humidity 73    
Minimum Humidity 27    
Precipitation  
Precipitation 0.00 in 0.03 in 0.17 in (1953)
Month to date precipitation 0.03 0.39  
Year to date precipitation 10.49 13.68  
Since 1 July precipitation 0.03 0.60  
Sea Level Pressure  
Sea Level Pressure 29.95 in    
Wind  
Wind Speed 7 mph (SSE)    
Max Wind Speed 29 mph    
Max Gust Speed 33 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Oct. 18, 2012 Rise Set
Actual Time 7:21 AM PDT 6:27 PM PDT
Civil Twilight 6:54 AM PDT 6:53 PM PDT
Nautical Twilight 6:24 AM PDT 7:24 PM PDT
Astronomical Twilight 5:53 AM PDT 7:54 PM PDT
Moon 11:04 AM PDT (10/18) 9:11 PM PDT (10/18)
Length of Visible Light 11h 59m
Length of Day
11h 06m
Waxing Crescent, 15% of the Moon is Illuminated
Oct 18
Waxing Crescent
Oct 21
First Quarter
Oct 29
Full
Nov 6
Last Quarter
Nov 13
New

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 64.9 °F 51.1 °F 61% 29.88 in 10.0 mi Calm Calm - N/A   Clear
1:56 AM 63.0 °F 46.0 °F 54% 29.89 in 10.0 mi Calm Calm - N/A   Clear
2:56 AM 60.8 °F 41.0 °F 48% 29.89 in 10.0 mi SSW 3.5 mph - N/A   Clear
3:56 AM 60.1 °F 45.0 °F 57% 29.87 in 10.0 mi Calm Calm - N/A   Clear
4:56 AM 57.9 °F 44.1 °F 60% 29.88 in 10.0 mi SSW 3.5 mph - N/A   Clear
5:56 AM 60.1 °F 42.1 °F 51% 29.90 in 10.0 mi Calm Calm - N/A   Clear
6:56 AM 60.8 °F 44.6 °F 55% 29.91 in 10.0 mi Calm Calm - N/A   Clear
7:56 AM 63.0 °F 46.0 °F 54% 29.92 in 10.0 mi Calm Calm - N/A   Clear
8:56 AM 64.4 °F 51.8 °F 64% 29.93 in 10.0 mi ESE 3.5 mph - N/A   Clear
9:56 AM 69.1 °F 51.1 °F 53% 29.94 in 10.0 mi East 3.5 mph - N/A   Clear
10:56 AM 71.1 °F 55.0 °F 57% 29.96 in 10.0 mi East 4.6 mph - N/A   Clear
11:56 AM 73.0 °F 52.0 °F 48% 29.96 in 10.0 mi ENE 4.6 mph - N/A   Clear
12:56 PM 73.0 °F 51.1 °F 46% 29.96 in 10.0 mi NNE 6.9 mph - N/A   Clear
1:56 PM 73.9 °F 53.1 °F 48% 29.95 in 10.0 mi NE 8.1 mph - N/A   Clear
2:56 PM 82.9 °F 48.0 °F 29% 29.94 in 10.0 mi SSE 13.8 mph 25.3 mph N/A   Clear
3:56 PM 84.0 °F 46.9 °F 27% 29.95 in 10.0 mi South 25.3 mph 32.2 mph N/A   Clear
4:56 PM 82.0 °F 48.0 °F 30% 29.95 in 10.0 mi South 17.3 mph 26.5 mph N/A   Clear
5:56 PM 77.0 °F 54.0 °F 45% 29.97 in 10.0 mi South 12.7 mph - N/A   Partly Cloudy
6:56 PM 73.9 °F 57.9 °F 57% 29.98 in 10.0 mi South 15.0 mph - N/A   Partly Cloudy
7:56 PM 72.0 °F 61.0 °F 68% 29.99 in 10.0 mi SSE 9.2 mph - N/A   Partly Cloudy
8:56 PM 71.1 °F 61.0 °F 70% 30.00 in 10.0 mi South 6.9 mph - N/A   Partly Cloudy
9:56 PM 70.0 °F 61.0 °F 73% 30.02 in 10.0 mi Calm Calm - N/A   Partly Cloudy
10:56 PM 71.1 °F 61.0 °F 70% 30.02 in 10.0 mi SSW 3.5 mph - N/A   Partly Cloudy
11:56 PM 69.1 °F 60.1 °F 73% 30.01 in 10.0 mi South 9.2 mph - N/A   Partly Cloudy