Weather History for KSFO - January, 2007

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Wednesday, January 17, 2007

  Actual Average Record
Temperature  
Mean Temperature 47 °F 50 °F  
Max Temperature 55 °F 56 °F 70 °F (1991)
Min Temperature 38 °F 44 °F 32 °F (1947)
Degree Days  
Heating Degree Days 18 15  
Month to date heating degree days 302 255  
Since 1 July heating degree days 1362 1265  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 35 °F    
Average Humidity 62    
Maximum Humidity 82    
Minimum Humidity 41    
Precipitation  
Precipitation 0.04 in 0.14 in 1.06 in (1973)
Month to date precipitation 0.28 2.38  
Year to date precipitation 0.28 2.38  
Since 1 July precipitation 5.62 9.95  
Snow  
Snow 0.00 in - 0.00 in ()
Month to date snowfall 0.0  
Since 1 July snowfall 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.19 in    
Wind  
Wind Speed 7 mph (NNW)    
Max Wind Speed 23 mph    
Max Gust Speed 25 mph    
Visibility 9 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Jan. 17, 2007 Rise Set
Actual Time 7:22 AM PST 5:16 PM PST
Civil Twilight 6:54 AM PST 5:45 PM PST
Nautical Twilight 6:22 AM PST 6:17 PM PST
Astronomical Twilight 5:50 AM PST 6:48 PM PST
Moon 6:33 AM PST (1/17) 3:41 PM PST (1/17)
Length of Visible Light 10h 51m
Length of Day
9h 54m
Waning Crescent, 2% of the Moon is Illuminated
Jan 17
Waning Crescent
Jan 18
New
Jan 25
First Quarter
Feb 1
Full
Feb 10
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 46.0 °F 41.4 °F 37.9 °F 73% 30.10 in 10.0 mi NNW 9.2 mph - N/A   Mostly Cloudy
1:09 AM 42.8 °F 34.0 °F 37.4 °F 81% 30.10 in 7.0 mi NE 20.7 mph - 0.01 in Rain Heavy Rain
1:15 AM 42.8 °F 34.0 °F 35.6 °F 76% 30.11 in 7.0 mi NNE 20.7 mph - 0.04 in Rain Light Rain
1:56 AM 43.0 °F 35.1 °F 35.1 °F 74% 30.12 in 7.0 mi NNE 17.3 mph - 0.04 in   Overcast
2:56 AM 43.0 °F 36.8 °F 33.1 °F 68% 30.12 in 7.0 mi NNE 11.5 mph - 0.00 in   Overcast
3:56 AM 43.0 °F 36.4 °F 36.0 °F 76% 30.12 in 9.0 mi North 12.7 mph - N/A   Scattered Clouds
4:56 AM 44.1 °F 37.4 °F 34.0 °F 68% 30.12 in 10.0 mi North 13.8 mph - N/A   Partly Cloudy
5:56 AM 43.0 °F 37.2 °F 34.0 °F 71% 30.14 in 10.0 mi North 10.4 mph - N/A   Partly Cloudy
6:56 AM 37.9 °F 33.5 °F 32.0 °F 79% 30.16 in 9.0 mi WSW 5.8 mph - N/A   Partly Cloudy
7:56 AM 41.0 °F - 32.0 °F 70% 30.18 in 9.0 mi Calm Calm - N/A   Partly Cloudy
8:56 AM 43.0 °F 39.5 °F 35.1 °F 74% 30.21 in 9.0 mi SSE 5.8 mph - N/A   Partly Cloudy
9:56 AM 45.0 °F 41.8 °F 36.0 °F 71% 30.23 in 8.0 mi East 5.8 mph - N/A   Partly Cloudy
10:56 AM 46.9 °F - 37.0 °F 68% 30.22 in 10.0 mi ESE 8.1 mph - N/A   Partly Cloudy
11:56 AM 48.0 °F - 39.0 °F 71% 30.20 in 10.0 mi East 6.9 mph - N/A   Partly Cloudy
12:56 PM 50.0 °F - 39.0 °F 66% 30.20 in 10.0 mi Calm Calm - N/A   Partly Cloudy
1:56 PM 52.0 °F - 35.1 °F 53% 30.19 in 10.0 mi NE 3.5 mph - N/A   Clear
2:56 PM 53.1 °F - 37.0 °F 55% 30.20 in 10.0 mi WNW 10.4 mph - N/A   Clear
3:56 PM 54.0 °F - 30.9 °F 41% 30.20 in 10.0 mi West 5.8 mph - N/A   Clear
4:56 PM 51.1 °F - 37.9 °F 61% 30.21 in 10.0 mi WNW 8.1 mph - N/A   Clear
5:56 PM 48.9 °F - 32.0 °F 52% 30.23 in 10.0 mi WNW 11.5 mph - N/A   Clear
6:56 PM 48.0 °F - 34.0 °F 58% 30.25 in 10.0 mi WNW 12.7 mph - N/A   Clear
7:56 PM 46.0 °F 41.9 °F 37.0 °F 71% 30.26 in 10.0 mi West 8.1 mph - N/A   Clear
8:56 PM 45.0 °F 43.5 °F 37.9 °F 76% 30.27 in 10.0 mi West 3.5 mph - N/A   Clear
9:56 PM 43.0 °F 40.3 °F 35.1 °F 74% 30.28 in 10.0 mi SSE 4.6 mph - N/A   Clear
10:56 PM 42.1 °F 40.2 °F 34.0 °F 73% 30.29 in 10.0 mi SW 3.5 mph - N/A   Clear
11:56 PM 44.1 °F - 34.0 °F 68% 30.29 in 10.0 mi Calm Calm - N/A   Clear