San Francisco, CA

2:31 AM PST on February 20, 2018 (GMT -0800)
San Francisco International

Weather History for KSFO - January, 2009

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Sunday, January 25, 2009

  Actual Average Record
Temperature  
Mean Temperature 50 °F 51 °F  
Max Temperature 55 °F 57 °F 68 °F (2011)
Min Temperature 45 °F 45 °F 31 °F (1954)
Degree Days  
Heating Degree Days 15 14  
Month to date heating degree days 329 371  
Since 1 July heating degree days 1307 1381  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 42 °F    
Average Humidity 75    
Maximum Humidity 83    
Minimum Humidity 66    
Precipitation  
Precipitation T in 0.13 in 2.54 in (2008)
Month to date precipitation 0.69 3.39  
Year to date precipitation 0.69 3.39  
Since 1 July precipitation 5.70  
Sea Level Pressure  
Sea Level Pressure 30.07 in    
Wind  
Wind Speed 19 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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Daily Weather History Graph

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Date:

Astronomy

Jan. 25, 2009 Rise Set
Actual Time 7:18 AM PST 5:26 PM PST
Civil Twilight 6:50 AM PST 5:54 PM PST
Nautical Twilight 6:18 AM PST 6:25 PM PST
Astronomical Twilight 5:47 AM PST 6:56 PM PST
Moon 7:02 AM PST (1/25) 5:03 PM PST (1/25)
Length of Visible Light 11h 03m
Length of Day
10h 07m
Waning Crescent, 0% of the Moon is Illuminated
Jan 25
Waning Crescent
Jan 25
New
Feb 2
First Quarter
Feb 9
Full
Feb 16
Last Quarter

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 50.0 °F - 41.0 °F 71% 30.17 in 10.0 mi West 16.1 mph - N/A   Overcast
1:56 AM 50.0 °F - 41.0 °F 71% 30.17 in 10.0 mi West 18.4 mph 23.0 mph N/A   Overcast
2:56 AM 50.0 °F - 39.9 °F 68% 30.15 in 10.0 mi West 19.6 mph 27.6 mph N/A   Overcast
3:56 AM 50.0 °F - 39.9 °F 68% 30.13 in 10.0 mi WNW 20.7 mph 27.6 mph N/A   Mostly Cloudy
4:56 AM 50.0 °F - 41.0 °F 71% 30.12 in 10.0 mi West 20.7 mph 26.5 mph N/A   Mostly Cloudy
5:56 AM 48.9 °F - 39.9 °F 71% 30.11 in 10.0 mi WNW 13.8 mph 29.9 mph N/A   Mostly Cloudy
6:56 AM 48.9 °F - 41.0 °F 74% 30.11 in 10.0 mi WNW 18.4 mph 28.8 mph N/A   Scattered Clouds
7:27 AM 48.2 °F - 42.8 °F 82% 30.11 in 10.0 mi West 19.6 mph 25.3 mph N/A   Mostly Cloudy
7:46 AM 48.2 °F - 41.0 °F 76% 30.12 in 10.0 mi West 26.5 mph 34.5 mph N/A   Mostly Cloudy
7:56 AM 48.9 °F - 41.0 °F 74% 30.12 in 10.0 mi West 21.9 mph 27.6 mph N/A   Mostly Cloudy
8:56 AM 50.0 °F - 43.0 °F 77% 30.13 in 10.0 mi WNW 16.1 mph 25.3 mph N/A   Scattered Clouds
9:56 AM 52.0 °F - 42.1 °F 69% 30.13 in 10.0 mi WNW 18.4 mph 27.6 mph N/A   Scattered Clouds
10:56 AM 53.6 °F - 42.8 °F 67% 30.12 in 10.0 mi West 23.0 mph - N/A   Scattered Clouds
11:56 AM 54.0 °F - 42.1 °F 64% 30.10 in 10.0 mi West 24.2 mph 29.9 mph N/A   Scattered Clouds
12:56 PM 52.0 °F - 43.0 °F 71% 30.07 in 10.0 mi West 20.7 mph 28.8 mph N/A   Mostly Cloudy
1:56 PM 54.0 °F - 43.0 °F 66% 30.04 in 10.0 mi West 21.9 mph 27.6 mph 0.00 in   Mostly Cloudy
2:56 PM 53.1 °F - 43.0 °F 69% 30.03 in 10.0 mi West 26.5 mph 29.9 mph N/A   Mostly Cloudy
3:56 PM 52.0 °F - 43.0 °F 71% 30.01 in 10.0 mi West 20.7 mph - 0.00 in   Mostly Cloudy
4:56 PM 50.0 °F - 43.0 °F 77% 30.00 in 10.0 mi West 24.2 mph 29.9 mph N/A   Scattered Clouds
5:56 PM 50.0 °F - 42.1 °F 74% 30.00 in 10.0 mi West 20.7 mph - N/A   Mostly Cloudy
6:43 PM 48.2 °F - 42.8 °F 82% 30.00 in 10.0 mi WNW 19.6 mph 26.5 mph N/A   Scattered Clouds
6:56 PM 48.9 °F - 42.1 °F 77% 30.00 in 10.0 mi WNW 20.7 mph 29.9 mph N/A   Scattered Clouds
7:56 PM 48.9 °F - 43.0 °F 80% 30.00 in 10.0 mi WNW 20.7 mph - N/A   Scattered Clouds
8:56 PM 48.0 °F - 42.1 °F 80% 30.01 in 10.0 mi WNW 16.1 mph - N/A   Scattered Clouds
9:56 PM 48.0 °F - 42.1 °F 80% 30.02 in 10.0 mi WNW 11.5 mph - N/A   Scattered Clouds
10:56 PM 46.9 °F - 41.0 °F 80% 30.02 in 10.0 mi WNW 8.1 mph - N/A   Scattered Clouds
11:56 PM 45.0 °F 41.2 °F 39.9 °F 82% 30.02 in 10.0 mi West 6.9 mph - N/A   Partly Cloudy