Weather History for KSFO - January, 2003

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Month of January, 2003

  Max Avg Min Sum
Temperature  
Max Temperature 66 °F 58 °F 51 °F
Mean Temperature 58 °F 54 °F 48 °F
Min Temperature 55 °F 49 °F 43 °F
Degree Days  
Heating Degree Days (base 65) 18 11 6 351
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 8 4 0 119
Dew Point  
Dew Point 57 °F 50 °F 31 °F
Precipitation  
Precipitation 0.89 in 0.05 in 0.00 in 1.46 in
Snowdepth - - - -
Wind  
Wind 23 mph 5 mph 0 mph
Gust Wind 22 mph 20 mph 18 mph
Sea Level Pressure  
Sea Level Pressure 30.36 in 30.20 in 29.97 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Jan. 02, 2003 Rise Set
Actual Time 7:24 AM PST 5:02 PM PST
Civil Twilight 6:55 AM PST 5:31 PM PST
Nautical Twilight 6:22 AM PST 6:04 PM PST
Astronomical Twilight 5:50 AM PST 6:36 PM PST
Moon 7:31 AM PST (1/2) 4:57 PM PST (1/2)
Length of Visible Light 10h 36m
Length of Day
9h 37m
Waning Crescent, 0% of the Moon is Illuminated
Jan 2
Waning Crescent
Jan 2
New
Jan 10
First Quarter
Jan 18
Full
Jan 25
Last Quarter

Daily Weather History & Observations

2003 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 52 48 43 50 46 43 100 90 80 30.35 30.28 30.23 10 9 5 9 2 - 0.00  
2 54 50 46 49 47 45 100 88 77 30.27 30.23 30.17 10 9 7 8 3 - 0.00  
3 55 50 46 48 46 44 97 84 67 30.23 30.19 30.15 10 10 7 8 3 - 0.00  
4 57 52 48 54 50 46 100 91 78 30.32 30.26 30.17 10 9 8 9 3 - 0.00 Fog
5 55 52 48 54 51 47 100 97 80 30.31 30.25 30.09 10 4 0 8 3 - 0.01 Fog
6 66 58 51 47 41 36 83 55 33 30.16 30.11 30.07 10 10 10 15 8 - 0.00  
7 64 54 44 49 44 35 97 74 42 30.20 30.12 30.04 10 9 7 12 4 - 0.00  
8 55 50 44 50 47 41 96 87 75 30.07 30.02 29.99 10 8 5 8 4 - 0.00  
9 54 52 50 54 51 48 100 96 89 30.06 30.01 29.97 10 4 2 12 6 - 0.89 Rain
10 61 57 53 55 54 53 100 91 75 30.13 30.04 29.98 10 9 5 16 9 21 0.20 Rain
11 55 54 52 54 53 52 100 94 87 30.18 30.13 30.09 10 10 8 9 4 - 0.00  
12 62 58 53 54 53 51 100 86 72 30.29 30.22 30.16 10 10 8 16 8 18 0.09 Rain
13 60 56 53 55 54 52 100 94 83 30.31 30.26 30.23 10 9 8 8 3 - 0.00 Rain
14 57 54 51 54 53 52 100 94 84 30.31 30.25 30.21 10 9 2 14 4 - 0.00  
15 60 56 48 54 51 46 100 87 69 30.33 30.28 30.26 10 10 6 15 5 - 0.00  
16 60 53 46 51 46 43 90 80 64 30.30 30.25 30.20 10 10 8 9 6 - 0.00  
17 59 51 43 52 47 40 93 84 67 30.21 30.16 30.09 10 10 7 8 2 - 0.00  
18 55 50 46 51 48 46 100 91 83 30.21 30.17 30.14 8 6 2 10 4 - 0.00  
19 52 49 46 49 46 44 100 91 83 30.20 30.17 30.14 8 5 2 10 6 - 0.01  
20 51 48 46 48 46 45 100 95 87 30.22 30.18 30.14 5 3 2 9 6 - 0.05 Rain
21 55 52 48 54 52 48 100 98 92 30.22 30.19 30.15 7 3 1 13 5 - 0.08 Rain
22 62 57 52 57 55 52 100 93 75 30.31 30.23 30.19 10 7 2 15 7 22 0.08 Rain
23 59 57 55 57 56 54 100 97 90 30.29 30.26 30.23 10 9 5 9 5 - 0.03  
24 57 55 53 54 53 52 100 93 83 30.32 30.27 30.24 9 8 4 9 5 - 0.00  
25 62 58 54 56 54 53 97 89 78 30.33 30.29 30.24 10 8 5 9 3 - 0.00  
26 60 56 53 54 52 31 97 85 37 30.30 30.24 30.17 10 8 6 8 4 - 0.00  
27 63 58 53 56 53 50 94 87 77 30.16 30.12 30.08 10 8 5 23 5 - 0.00  
28 62 56 50 52 51 48 100 90 60 30.22 30.17 30.13 10 6 0 13 3 - 0.01 Fog
29 60 54 48 54 50 45 100 88 67 30.36 30.30 30.20 10 7 2 13 4 - 0.00  
30 59 55 51 54 52 50 100 91 72 30.35 30.31 30.26 10 7 0 9 4 - 0.00  
31 60 54 48 54 51 46 100 90 78 30.25 30.16 30.06 10 5 2 16 5 - 0.01