San Francisco, CA

12:36 PM PDT on June 27, 2017 (GMT -0700)
San Francisco International

Weather History for KSFO - December, 1998

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Week of December 20, 1998 through December 26, 1998

  Max Avg Min Sum
Temperature  
Max Temperature 50 °F 46 °F 42 °F
Mean Temperature 44 °F 40 °F 37 °F
Min Temperature 37 °F 34 °F 32 °F
Degree Days  
Heating Degree Days (base 65) 28 25 22 176
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 49 °F 29 °F 9 °F
Precipitation  
Precipitation 0.17 in 0.02 in 0.00 in 0.17 in
Snowdepth - - - -
Wind  
Wind 30 mph 6 mph 0 mph
Gust Wind 37 mph 29 mph 22 mph
Sea Level Pressure  
Sea Level Pressure 30.58 in 30.36 in 30.06 in

Weekly Weather History Graph

Weekly Weather History Graph

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Date:

Astronomy

Dec. 25, 1998 Rise Set
Actual Time 7:22 AM PST 4:56 PM PST
Civil Twilight 6:53 AM PST 5:26 PM PST
Nautical Twilight 6:20 AM PST 5:58 PM PST
Astronomical Twilight 5:48 AM PST 6:30 PM PST
Moon 11:55 AM PST (12/25) No Moon Set
Length of Visible Light 10h 32m
Length of Day
9h 34m
Waxing Crescent, 43% of the Moon is Illuminated
Dec 25
Waxing Crescent
Dec 26
First Quarter
Jan 1
Full
Jan 9
Last Quarter
Jan 17
New

Daily Weather History & Observations

1998 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  
20 45 41 37 40 31 18 93 68 41 30.39 30.16 30.06 10 10 6 30 15 37 0.17 Rain
21 42 37 32 23 17 9 64 46 26 30.51 30.43 30.36 10 10 9 14 7 - 0.00  
22 46 40 34 32 25 19 73 56 43 30.36 30.29 30.23 10 10 9 15 7 - 0.00  
23 46 40 33 33 25 16 92 58 32 30.45 30.35 30.27 10 10 8 9 5 - 0.00  
24 45 38 32 36 30 23 83 71 58 30.58 30.50 30.44 10 6 4 10 5 - 0.00  
25 46 40 34 41 34 29 93 77 60 30.55 30.47 30.40 10 6 3 10 3 - 0.00  
26 50 44 37 49 42 36 100 90 68 30.41 30.31 30.25 9 5 0 12 3 - 0.00 Fog