Weather History for Ketchikan, AK

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 7 °C 3 °C -1 °C
Mean Temperature 4 °C 1 °C -3 °C
Min Temperature 3 °C -1 °C -7 °C
Degree Days  
Heating Degree Days (base 65) 40 31 24 967
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 6 °C -1 °C -11 °C
Precipitation  
Precipitation 36.3 mm 7.5 mm 0.0 mm 233.15 mm
Snowdepth - - - -
Wind  
Wind 55 km/h 9 km/h 0 km/h
Gust Wind 74 km/h 38 km/h 26 km/h
Sea Level Pressure  
Sea Level Pressure 1029 hPa 1004 hPa 983 hPa

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 31, 2012 Rise Set
Actual Time 8:14 AM AKST 3:26 PM AKST
Civil Twilight 7:28 AM AKST 4:12 PM AKST
Nautical Twilight 6:40 AM AKST 5:00 PM AKST
Astronomical Twilight 5:55 AM AKST 5:44 PM AKST
Moon 7:46 PM AKST (12/31) 9:21 AM AKST (12/31)
Length of Visible Light 8h 44m
Length of Day
7h 12m
Waning Gibbous, 89% of the Moon is Illuminated
Dec 31
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

Weather History Calendar

Precipitation Actual month total 233.15 Average Month Total: 36.4
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Snow
Actual:
3 | 1 9.14
Average:
6 | -1 1.17
Snow
Actual:
3 | 1 28.19
Average:
5 | -1 1.42
Snow
Actual:
4 | 1 17.53
Average:
4 | -1 0.97
Snow
Actual:
3 | 1 11.94
Average:
4 | -1 1.07
Snow
Actual:
3 | 1 7.62
Average:
4 | -1 1.30
Snow
Actual:
3 | 1 9.65
Average:
5 | -1 1.80
Snow
Actual:
1 | -2 1.27
Average:
5 | -1 1.37
Snow
Actual:
1 | -1 5.08
Average:
5 | -1 1.63
Snow
Actual:
4 | 1 8.64
Average:
4 | -1 1.37
Rain
Actual:
7 | 2 20.07
Average:
4 | -1 1.07
Rain
Actual:
6 | 3 1.52
Average:
4 | -1 0.86
Rain
Actual:
5 | 1 17.53
Average:
5 | -1 0.89
Rain
Actual:
6 | 2 8.89
Average:
5 | -1 1.35
Rain
Actual:
6 | 2 36.32
Average:
4 | -1 1.30
Rain
Actual:
5 | 1 14.22
Average:
4 | -1 1.09
Snow
Actual:
1 | -3 4.57
Average:
4 | -1 0.84
Snow
Actual:
0 | -4 1.52
Average:
4 | -1 1.30
Mostly Cloudy
Actual:
3 | -5 0.00
Average:
4 | -2 1.32
Snow
Actual:
3 | 2 0.25
Average:
4 | -1 1.09
Snow
Actual:
2 | -1 0.25
Average:
4 | -1 1.52
Partly Cloudy
Actual:
1 | -4 0.00
Average:
4 | -2 0.51
Snow
Actual:
1 | -6 0.00
Average:
4 | -2 0.71
Partly Cloudy
Actual:
0 | -7 0.00
Average:
4 | -2 1.40
Partly Cloudy
Actual:
1 | -5 0.00
Average:
6 | 0 1.37
Partly Cloudy
Actual:
3 | -4 0.00
Average:
6 | 1 1.60
Scattered Clouds
Actual:
-1 | -6 0.00
Average:
5 | 1 1.09
Snow
Actual:
2 | -1 15.49
Average:
4 | -2 0.53
Rain
Actual:
3 | 2 6.60
Average:
4 | -2 1.88
Rain
Actual:
3 | 2 0.51
Average:
4 | -2 0.76
Rain
Actual:
6 | 3 4.32
Average:
4 | -2 1.04
Partly Cloudy
Actual:
7 | 3 2.03
Average:
3 | -3 0.84
 

Calendar Legend

Sunny
Clear
Mostly Cloudy
Partly Sunny
Partly Cloudy
Mostly Sunny
Cloudy Rain Snow
Hail
Flurries
Thunderstorms Hazy
Fog
Sleet '?' denotes
'chance of'
Unknown

Daily Weather History & Observations

2012 Temp. (°C) Dew Point (°C) Humidity (%) Sea Level Press. (hPa) Visibility (km) Wind (km/h) Precip. (mm) Events
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 3 2 1 2 2 1 100 97 89 989 988 986 16 14 6 8 2 - 9.14 Rain , Snow
2 3 2 1 2 1 0 100 94 89 992 986 984 16 9 1 23 3 37 28.19 Rain , Snow
3 4 2 1 2 1 0 100 91 79 998 993 989 16 14 3 39 16 50 17.53 Rain , Snow
4 3 2 1 2 1 0 100 95 93 998 991 983 16 14 4 16 6 - 11.94 Rain , Snow
5 3 2 1 2 1 0 100 92 79 1010 1006 999 16 13 3 14 10 29 7.62 Rain , Snow
6 3 2 1 1 0 -2 100 92 70 1010 1007 1002 16 10 1 26 11 35 9.65 Rain , Snow
7 1 -1 -2 1 -1 -3 100 95 87 1020 1011 1005 16 13 3 10 3 - 1.27 Snow
8 1 0 -1 0 -1 -2 96 90 82 1023 1019 1013 16 10 2 29 6 47 5.08 Snow
9 4 2 1 3 2 0 100 95 89 1020 1016 1012 16 12 2 26 14 37 8.64 Rain , Snow
10 7 4 2 6 4 2 100 97 92 1020 1009 994 16 11 3 34 13 50 20.07 Rain
11 6 4 3 4 3 1 100 92 86 1010 999 993 16 16 10 19 13 29 1.52 Rain
12 5 2 1 4 1 -1 96 92 83 1013 1009 1002 16 14 6 32 11 47 17.53 Rain
13 6 3 2 5 3 1 100 92 79 1007 1003 1000 16 14 6 26 14 48 8.89 Rain
14 6 3 2 4 2 1 96 92 86 1007 996 984 16 14 10 55 23 74 36.32 Rain
15 5 3 1 3 2 0 100 91 86 992 988 983 16 15 8 39 19 53 14.22 Rain
16 1 -1 -3 1 -1 -4 100 95 92 992 991 989 16 11 2 21 6 27 4.57 Snow
17 0 -2 -4 -1 -3 -6 96 92 86 1004 995 990 16 12 1 11 2 - 1.52 Fog , Snow
18 3 -1 -5 -2 -3 -6 100 84 62 1005 1000 989 16 16 16 34 6 50 0.00  
19 3 2 2 -1 -2 -3 82 73 65 996 989 985 16 14 5 37 21 60 0.25 Snow
20 2 1 -1 -2 -3 -5 82 73 59 1006 1001 997 16 16 14 14 3 - 0.25 Snow
21 1 -1 -4 -3 -7 -9 82 65 46 1008 1007 1006 16 16 16 14 5 29 0.00  
22 1 -3 -6 -3 -6 -9 93 76 56 1006 1004 1002 16 14 3 8 3 - 0.00 Snow
23 0 -3 -7 -7 -8 -10 89 71 56 1015 1009 1005 16 16 16 6 3 - 0.00  
24 1 -2 -5 -8 -10 -11 65 56 46 1018 1015 1012 16 16 16 10 2 - 0.00  
25 3 -1 -4 -3 -6 -8 77 65 48 1011 1008 1006 16 16 16 14 6 34 0.00  
26 -1 -3 -6 -4 -6 -8 92 80 66 1014 1011 1008 16 16 16 8 2 - 0.00  
27 2 0 -1 2 0 -6 100 93 66 1014 1010 1009 16 11 5 19 10 - 15.49 Rain , Snow
28 3 2 2 3 2 2 100 100 97 1021 1015 1010 16 13 2 10 6 - 6.60 Rain
29 3 2 2 3 2 2 100 98 89 1023 1022 1020 16 13 3 13 3 - 0.51 Rain
30 6 4 3 5 2 1 100 87 68 1020 1015 1009 16 16 6 45 19 53 4.32 Rain
31 7 4 3 5 4 2 100 93 76 1029 1023 1009 16 16 16 42 18 61 2.03