Weather History for KSFO - January, 2008

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Month of January, 2008

  Max Avg Min Sum
Temperature  
Max Temperature 59 °F 53 °F 46 °F
Mean Temperature 55 °F 49 °F 44 °F
Min Temperature 50 °F 43 °F 38 °F
Degree Days  
Heating Degree Days (base 65) 22 16 10 511
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 5 0 0 11
Dew Point  
Dew Point 56 °F 42 °F 24 °F
Precipitation  
Precipitation 2.54 in 0.28 in 0.00 in 8.15 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 54 mph 8 mph 0 mph
Gust Wind 68 mph 27 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.39 in 30.07 in 29.47 in

Monthly Weather History Graph

Monthly Weather History Graph

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Astronomy

Jan. 31, 2008 Rise Set
Actual Time 7:14 AM PST 5:31 PM PST
Civil Twilight 6:46 AM PST 5:59 PM PST
Nautical Twilight 6:15 AM PST 6:30 PM PST
Astronomical Twilight 5:44 AM PST 7:01 PM PST
Moon 2:10 AM PST (1/31) 11:44 AM PST (1/31)
Length of Visible Light 11h 12m
Length of Day
10h 17m
Waning Crescent, 35% of the Moon is Illuminated
Jan 31
Waning Crescent
Feb 6
New
Feb 13
First Quarter
Feb 20
Full
Feb 28
Last Quarter

Daily Weather History & Observations

2008 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  
1 54 46 39 41 37 32 83 70 59 30.30 30.22 30.16 10 10 8 13 5 - 0.00  
2 53 46 39 45 41 36 86 75 63 30.15 30.07 30.01 10 9 8 18 5 24 0.00  
3 57 52 48 50 47 43 94 80 58 30.02 29.92 29.82 10 7 2 25 13 34 0.23 Rain
4 59 55 50 56 51 40 96 80 63 29.78 29.58 29.47 10 5 1 54 25 68 2.10 Rain
5 54 50 46 47 44 41 93 81 68 29.82 29.77 29.71 10 8 1 29 13 41 0.77 Rain , Thunderstorm
6 58 50 41 43 40 38 89 76 63 29.95 29.89 29.83 10 10 8 17 6 22 0.06 Rain
7 52 48 44 45 40 35 93 74 54 30.21 30.08 29.94 10 10 10 15 5 23 T Rain
8 55 49 43 54 46 36 100 83 65 30.20 30.10 29.97 10 8 2 31 12 38 0.08 Rain
9 51 48 44 46 46 43 93 87 80 30.31 30.25 30.21 10 7 3 13 3 15 0.01 Rain
10 50 49 48 49 47 45 93 90 86 30.27 30.22 30.19 8 3 0 12 3 13 0.10 Fog , Rain
11 55 52 48 49 47 45 100 89 77 30.29 30.23 30.19 10 5 0 9 4 - 0.00 Fog
12 56 52 47 46 45 43 93 82 71 30.31 30.27 30.22 10 7 5 12 3 22 0.00  
13 58 51 44 46 44 41 93 75 57 30.32 30.28 30.24 10 10 7 9 3 10 0.00  
14 56 49 42 46 44 41 96 84 71 30.35 30.31 30.27 10 8 5 10 1 13 0.00  
15 50 47 43 45 44 40 100 81 62 30.31 30.24 30.15 10 3 0 10 4 12 0.00 Fog
16 56 48 40 42 32 24 93 62 30 30.19 30.12 30.07 10 10 10 18 8 22 0.00  
17 57 50 43 38 30 24 71 53 35 30.24 30.18 30.14 10 10 10 17 9 21 0.00  
18 57 48 39 42 38 35 93 69 42 30.27 30.20 30.16 10 10 10 6 1 - 0.00  
19 54 47 39 45 40 35 92 73 54 30.33 30.23 30.13 10 8 3 18 4 21 0.00  
20 52 49 45 43 39 35 93 74 54 30.11 29.99 29.92 10 10 10 26 15 35 T  
21 47 45 43 45 41 37 100 88 76 30.01 29.97 29.93 10 9 2 15 7 18 0.60 Rain , Thunderstorm
22 48 44 40 41 39 38 93 85 76 30.07 30.04 30.01 10 10 10 17 8 21 0.10 Rain
23 47 45 43 40 40 39 89 83 76 30.01 29.93 29.82 10 10 10 15 7 16 0.06 Rain
24 46 44 41 40 38 37 89 82 76 29.83 29.75 29.68 10 10 4 21 10 30 0.28 Rain
25 53 49 45 51 47 38 100 86 71 29.95 29.81 29.69 10 6 1 23 14 31 2.54 Rain
26 58 54 49 49 45 41 93 80 66 30.02 29.90 29.69 10 10 9 22 8 29 0.23 Rain
27 56 51 45 49 46 37 93 80 66 29.76 29.61 29.51 10 9 2 31 15 41 0.32 Rain
28 50 46 41 38 36 34 79 66 52 30.27 30.07 29.78 10 10 5 26 10 31 0.15 Rain
29 50 44 38 46 40 35 86 74 61 30.31 30.24 30.17 10 9 2 26 8 30 0.08 Rain
30 53 47 41 42 40 36 89 72 54 30.39 30.33 30.27 10 10 5 17 6 24 0.11 Rain
31 53 49 45 51 45 39 100 85 69 30.38 30.26 30.15 10 8 2 23 8 39 0.33 Rain