Weather History for KSEA - December, 2011

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Month of December, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 53 °F 44 °F 38 °F
Mean Temperature 51 °F 39 °F 33 °F
Min Temperature 48 °F 34 °F 26 °F
Degree Days  
Heating Degree Days (base 65) 32 26 14 791
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 2 0 0 2
Dew Point  
Dew Point 52 °F 35 °F 25 °F
Precipitation  
Precipitation 0.90 in 0.09 in 0.00 in 2.24 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 38 mph 6 mph 0 mph
Gust Wind 53 mph 26 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.81 in 30.30 in 29.58 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 30, 2011 Rise Set
Actual Time 7:56 AM PST 4:26 PM PST
Civil Twilight 7:20 AM PST 5:02 PM PST
Nautical Twilight 6:41 AM PST 5:41 PM PST
Astronomical Twilight 6:04 AM PST 6:19 PM PST
Moon 10:50 AM PST (12/30) 11:37 PM PST (12/30)
Length of Visible Light 9h 41m
Length of Day
8h 30m
Waxing Crescent, 36% of the Moon is Illuminated
Dec 30
Waxing Crescent
Dec 31
First Quarter
Jan 8
Full
Jan 16
Last Quarter
Jan 22
New

Daily Weather History & Observations

2011 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 41 35 29 36 34 28 100 90 79 30.81 30.66 30.42 10 4 0 13 3 14 T Fog
2 44 38 32 37 34 30 92 81 70 30.55 30.51 30.43 10 9 6 10 4 12 0.01 Rain
3 42 37 31 36 33 28 96 88 79 30.55 30.52 30.48 10 8 1 8 2 10 0.00  
4 43 37 31 35 33 29 92 80 67 30.62 30.58 30.52 10 9 6 18 6 23 0.00  
5 42 35 28 34 31 27 92 83 73 30.59 30.50 30.43 10 8 0 9 4 10 0.00 Fog
6 38 33 28 34 31 27 100 93 85 30.51 30.46 30.42 10 5 0 8 4 9 0.00 Fog
7 41 38 35 37 35 32 100 90 79 30.49 30.46 30.42 10 5 0 13 5 15 0.00 Fog
8 40 36 32 34 31 30 89 80 70 30.48 30.44 30.37 10 10 10 16 7 18 0.00  
9 40 33 26 34 30 25 100 90 79 30.40 30.30 30.14 10 4 0 8 3 9 0.00 Fog
10 40 36 31 38 33 28 100 85 70 30.19 30.16 30.12 10 8 3 13 4 13 T Rain
11 40 38 35 37 35 33 92 86 79 30.25 30.15 30.10 10 7 0 16 6 20 0.02 Fog , Rain
12 39 34 28 32 29 27 100 80 59 30.30 30.21 30.08 10 5 0 16 8 18 0.00 Fog
13 41 34 26 32 29 25 100 80 60 30.16 30.08 30.03 10 6 0 10 4 12 0.00 Fog
14 40 37 33 34 30 28 89 80 70 30.20 30.15 30.09 10 10 10 10 4 15 T Rain
15 44 41 38 43 38 31 100 82 64 30.51 30.34 30.13 10 5 1 9 4 12 0.03 Rain
16 49 45 40 43 41 36 96 87 77 30.51 30.47 30.41 10 10 10 13 5 15 0.00  
17 50 42 33 39 36 32 100 83 66 30.41 30.22 30.07 10 7 0 18 5 24 0.00 Fog
18 46 41 35 43 41 37 100 88 76 30.46 30.25 30.08 10 6 0 14 4 16 0.19 Rain
19 46 41 36 40 37 34 100 88 76 30.50 30.46 30.43 10 5 0 10 3 13 0.00 Fog
20 44 41 37 41 39 35 96 86 76 30.42 30.32 30.28 10 7 1 13 6 15 T  
21 45 39 32 38 34 30 100 81 62 30.56 30.49 30.39 10 9 6 10 4 14 0.00  
22 38 33 27 34 30 25 100 91 82 30.55 30.40 30.32 10 4 0 13 4 16 0.00 Fog
23 49 42 35 43 36 28 92 81 70 30.57 30.52 30.37 10 9 3 18 6 23 0.02 Rain
24 52 48 43 42 39 36 83 70 56 30.53 30.43 30.21 10 10 7 10 4 14 T Rain
25 50 44 37 41 38 34 96 81 65 30.39 30.17 29.99 10 10 9 38 13 53 0.03 Rain
26 42 40 37 37 35 33 86 78 70 30.38 30.28 30.17 10 10 10 14 7 18 0.05 Rain
27 51 46 40 50 44 37 100 93 86 30.17 29.99 29.74 10 6 1 23 8 33 0.90 Rain
28 53 51 48 52 48 43 96 85 74 29.92 29.78 29.59 10 8 3 29 16 39 0.63 Rain
29 51 48 44 49 42 39 100 88 76 30.10 29.85 29.58 10 9 5 28 11 39 0.29 Rain
30 49 43 36 43 37 31 93 78 62 30.24 29.83 29.60 10 10 7 24 13 31 0.07 Rain
31 43 38 32 34 29 25 89 70 51 30.44 30.35 30.24 10 10 10 15 6 20 0.00