San Francisco, CA

1:01 AM PDT on March 30, 2017 (GMT -0700)
San Francisco International

Weather History for KSFO - December, 1998

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Month of December, 1998

  Max Avg Min Sum
Temperature  
Max Temperature 70 °F 52 °F 42 °F
Mean Temperature 62 °F 47 °F 37 °F
Min Temperature 53 °F 41 °F 32 °F
Degree Days  
Heating Degree Days (base 65) 28 18 4 561
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 12 1 0 35
Dew Point  
Dew Point 56 °F 40 °F 9 °F
Precipitation  
Precipitation 0.31 in 0.03 in 0.00 in 0.98 in
Snowdepth - - - -
Wind  
Wind 39 mph 7 mph 0 mph
Gust Wind 51 mph 28 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.58 in 30.26 in 29.94 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 01, 1998 Rise Set
Actual Time 7:05 AM PST 4:51 PM PST
Civil Twilight 6:36 AM PST 5:20 PM PST
Nautical Twilight 6:04 AM PST 5:52 PM PST
Astronomical Twilight 5:32 AM PST 6:24 PM PST
Moon 3:51 PM PST (12/1) 4:32 AM PST (12/1)
Length of Visible Light 10h 43m
Length of Day
9h 45m
Waxing Gibbous, 95% of the Moon is Illuminated
Dec 1
Waxing Gibbous
Dec 3
Full
Dec 10
Last Quarter
Dec 18
New
Dec 26
First Quarter

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  
1 57 52 48 48 46 44 93 80 60 30.26 30.20 30.12 10 10 5 16 7 - 0.00  
2 59 55 51 56 52 46 100 88 77 30.25 30.20 30.12 10 9 4 12 8 - 0.01 Rain
3 57 52 43 56 47 36 100 81 59 30.12 30.04 29.97 10 9 2 26 12 30 0.26 Rain
4 50 44 39 41 38 35 93 76 61 30.20 30.14 30.07 10 10 9 13 4 - 0.00  
5 52 46 39 48 39 30 94 74 59 30.32 30.17 29.99 10 9 3 39 9 51 0.31 Rain
6 52 47 42 40 37 33 82 69 58 30.38 30.28 30.13 10 10 10 22 11 30 0.00  
7 50 44 37 42 39 36 97 79 59 30.48 30.43 30.38 10 10 10 7 3 - 0.00  
8 51 47 42 47 43 40 93 83 76 30.47 30.42 30.38 10 9 3 13 8 - 0.00  
9 55 47 39 43 37 32 93 64 47 30.43 30.39 30.35 10 10 10 14 5 - 0.00  
10 54 49 44 49 42 33 89 74 54 30.48 30.43 30.40 10 8 4 15 7 - 0.00  
11 53 48 43 48 44 41 93 86 77 30.43 30.38 30.35 9 6 3 6 3 - 0.00  
12 53 48 43 48 45 41 97 86 71 30.37 30.27 30.17 10 8 4 7 3 - 0.00  
13 62 54 46 54 48 44 100 89 65 30.26 30.12 30.03 10 7 2 23 8 34 0.20 Rain
14 55 50 46 48 45 42 93 81 69 30.35 30.30 30.25 10 10 10 21 12 28 0.00  
15 61 52 42 46 42 39 97 68 44 30.32 30.26 30.20 10 10 10 9 3 - 0.00  
16 70 62 53 51 46 41 93 62 42 30.29 30.22 30.17 10 10 10 16 9 - 0.00  
17 59 54 48 52 49 45 97 87 70 30.18 30.11 30.01 10 8 4 9 4 - 0.00  
18 57 52 46 52 47 42 100 86 70 30.02 29.97 29.94 10 8 2 15 6 - 0.00  
19 48 46 43 41 33 27 77 60 50 30.10 30.02 29.94 10 10 10 29 15 33 0.00  
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
27 46 44 41 46 44 41 100 100 93 30.36 30.28 30.25 4 1 0 8 4 - 0.01 Fog
28 48 44 41 47 44 41 100 100 93 30.37 30.33 30.30 7 2 0 7 3 - 0.00 Fog
29 52 46 41 47 44 41 100 96 77 30.32 30.25 30.15 10 3 0 12 3 - 0.01 Fog
30 51 45 39 48 45 40 100 95 83 30.13 30.06 30.00 10 5 0 23 5 - 0.00 Fog
31 55 52 48 51 47 43 100 86 72 30.19 30.14 30.08 10 9 2 21 11 23 0.01