Weather History for San Francisco, CA

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Week of January 4, 1998 through January 10, 1998

  Max Avg Min Sum
Temperature  
Max Temperature 57 °F 53 °F 50 °F
Mean Temperature 54 °F 49 °F 44 °F
Min Temperature 51 °F 45 °F 39 °F
Degree Days  
Heating Degree Days (base 65) 20 16 11 111
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 4 1 0 4
Dew Point  
Dew Point 56 °F 47 °F 38 °F
Precipitation  
Precipitation 0.42 in 0.19 in 0.00 in 1.32 in
Snowdepth - - - -
Wind  
Wind 17 mph 7 mph 0 mph
Gust Wind 31 mph 24 mph 20 mph
Sea Level Pressure  
Sea Level Pressure 30.29 in 30.02 in 29.67 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Jan. 08, 1998 Rise Set
Actual Time 7:24 AM PST 5:07 PM PST
Civil Twilight 6:55 AM PST 5:36 PM PST
Nautical Twilight 6:23 AM PST 6:09 PM PST
Astronomical Twilight 5:51 AM PST 6:41 PM PST
Moon 2:09 PM PST (1/8) 3:18 AM PST (1/8)
Length of Visible Light 10h 41m
Length of Day
9h 43m
Waxing Gibbous, 83% of the Moon is Illuminated
Jan 8
Waxing Gibbous
Jan 12
Full
Jan 20
Last Quarter
Jan 27
New
Feb 3
First Quarter

Daily Weather History & Observations

1998 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Jan high avg low high avg low high avg low high avg low high avg low high avg high sum  
4 55 50 44 50 44 41 100 81 59 30.10 29.92 29.72 10 10 8 17 9 31 0.25 Rain
5 50 44 39 45 42 39 100 89 74 30.27 30.21 30.10 10 9 8 6 3 - 0.00  
6 54 48 41 48 44 38 100 88 66 30.29 30.20 30.15 10 7 2 10 5 - 0.24 Rain
7 50 49 48 49 47 45 100 96 89 30.19 30.14 30.11 10 8 2 17 9 - 0.10 Rain
8 51 48 46 47 46 45 100 90 83 30.10 29.99 29.88 10 9 5 14 9 - 0.00  
9 52 50 48 52 49 46 100 94 87 29.88 29.75 29.67 8 5 2 15 5 - 0.31 Rain
10 57 54 51 56 54 51 100 97 90 30.09 29.93 29.78 10 6 2 17 8 20 0.42 Rain