Weather History for KSFO - December, 2011

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Week of December 25, 2011 through December 31, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 59 °F 55 °F 52 °F
Mean Temperature 52 °F 49 °F 44 °F
Min Temperature 49 °F 43 °F 36 °F
Degree Days  
Heating Degree Days (base 65) 21 16 13 110
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 2 0 0 3
Dew Point  
Dew Point 52 °F 43 °F 28 °F
Precipitation  
Precipitation 0.00 in 0.00 in 0.00 in 0.00 in
Snowdepth - - - -
Wind  
Wind 18 mph 4 mph 0 mph
Gust Wind 21 mph - -
Sea Level Pressure  
Sea Level Pressure 30.45 in 30.28 in 30.14 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Dec. 30, 2011 Rise Set
Actual Time 7:24 AM PST 5:00 PM PST
Civil Twilight 6:54 AM PST 5:29 PM PST
Nautical Twilight 6:22 AM PST 6:02 PM PST
Astronomical Twilight 5:50 AM PST 6:33 PM PST
Moon 10:53 AM PST (12/30) 11:32 PM PST (12/30)
Length of Visible Light 10h 34m
Length of Day
9h 35m
Waxing Crescent, 36% of the Moon is Illuminated
Dec 30
Waxing Crescent
Dec 31
First Quarter
Jan 8
Full
Jan 16
Last Quarter
Jan 22
New

Daily Weather History & Observations

2011 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
25 52 44 36 41 35 28 85 73 61 30.45 30.38 30.32 9 7 5 8 2 9 0.00  
26 52 46 39 45 41 34 89 80 71 30.38 30.32 30.30 10 7 3 15 4 18 0.00  
27 57 51 45 46 41 37 86 71 55 30.37 30.34 30.30 10 9 4 14 4 16 0.00  
28 59 51 43 52 45 38 96 77 57 30.39 30.33 30.30 10 10 7 17 4 21 0.00  
29 56 51 46 52 49 45 100 92 83 30.29 30.22 30.14 10 4 0 16 4 18 0.00 Fog
30 54 52 49 52 50 46 96 91 86 30.24 30.19 30.15 10 9 3 18 5 21 0.00  
31 57 50 43 45 39 33 96 68 40 30.24 30.20 30.15 10 10 10 10 5 - 0.00