Weather History for Ketchikan, AK

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Month of May, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 64 °F 51 °F 44 °F
Mean Temperature 53 °F 46 °F 40 °F
Min Temperature 48 °F 41 °F 36 °F
Degree Days  
Heating Degree Days (base 65) 25 19 12 594
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 3 0 0 5
Dew Point  
Dew Point 51 °F 41 °F 27 °F
Precipitation  
Precipitation 4.56 in 0.60 in 0.00 in 18.73 in
Snowdepth - - - -
Wind  
Wind 30 mph 8 mph 0 mph
Gust Wind 41 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.42 in 30.02 in 29.49 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

May. 20, 2012 Rise Set
Actual Time 4:27 AM AKDT 9:00 PM AKDT
Civil Twilight 3:37 AM AKDT 9:51 PM AKDT
Nautical Twilight 2:16 AM AKDT 11:13 PM AKDT
Astronomical Twilight Sun does not rise Sun does not rise
Moon 4:15 AM AKDT (5/20) 9:07 PM AKDT (5/20)
Length of Visible Light 18h 13m
Length of Day
16h 32m
Waning Crescent, 0% of the Moon is Illuminated
May 20
Waning Crescent
May 20
New
May 28
First Quarter
Jun 4
Full
Jun 11
Last Quarter

Weather History Calendar

Precipitation Actual month total 18.73 Average Month Total: 10.09
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
48 | 39 0.29
Average:
53 | 39 0.47
Rain
Actual:
48 | 39 0.21
Average:
52 | 40 0.44
Rain
Actual:
51 | 37 0.02
Average:
53 | 39 0.52
Rain
Actual:
46 | 39 0.38
Average:
52 | 39 0.61
Rain
Actual:
48 | 41 0.27
Average:
54 | 39 0.38
Rain
Actual:
46 | 42 4.56
Average:
54 | 40 0.30
Rain
Actual:
48 | 42 4.33
Average:
54 | 40 0.45
Rain
Actual:
48 | 36 0.40
Average:
55 | 39 0.39
Rain
Actual:
44 | 36 0.41
Average:
55 | 38 0.10
Rain
Actual:
46 | 37 0.31
Average:
56 | 40 0.28
Rain
Actual:
46 | 42 0.14
Average:
57 | 40 0.39
Rain
Actual:
44 | 42 1.67
Average:
56 | 40 0.28
Rain
Actual:
52 | 37 0.36
Average:
56 | 41 0.25
Clear
Actual:
57 | 37 0.00
Average:
55 | 40 0.33
Partly Cloudy
Actual:
51 | 41 0.00
Average:
55 | 40 0.22
Rain
Actual:
44 | 39 0.49
Average:
55 | 41 0.36
Rain
Actual:
53 | 42 0.01
Average:
55 | 40 0.30
Rain
Actual:
50 | 41 0.00
Average:
56 | 40 0.44
Partly Cloudy
Actual:
55 | 36 0.00
Average:
56 | 41 0.25
Rain
Actual:
53 | 45 0.33
Average:
55 | 41 0.34
Rain
Actual:
55 | 48 0.83
Average:
55 | 41 0.40
Rain
Actual:
55 | 39 0.05
Average:
55 | 40 0.26
Partly Cloudy
Actual:
59 | 41 0.00
Average:
56 | 40 0.34
Clear
Actual:
64 | 37 0.00
Average:
56 | 42 0.23
Clear
Actual:
62 | 46 0.00
Average:
57 | 42 0.34
Rain
Actual:
53 | 48 0.27
Average:
57 | 42 0.20
Rain
Actual:
52 | 46 0.07
Average:
58 | 43 0.17
Rain
Actual:
53 | 44 0.20
Average:
58 | 43 0.30
Rain
Actual:
48 | 44 0.74
Average:
59 | 44 0.10
Rain
Actual:
51 | 46 1.84
Average:
59 | 43 0.24
Rain
Actual:
52 | 46 0.55
Average:
60 | 44 0.41
 

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. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
May high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 48 44 39 43 40 37 100 90 68 29.86 29.74 29.62 10 9 4 17 2 20 0.29 Rain
2 48 44 39 42 39 36 100 86 63 29.89 29.88 29.86 10 10 5 14 5 21 0.21 Rain
3 51 44 37 40 38 35 100 83 57 29.87 29.82 29.78 10 10 6 12 2 - 0.02 Rain
4 46 42 39 42 38 33 100 86 61 30.10 29.99 29.86 10 10 7 17 6 24 0.38 Rain
5 48 44 41 41 39 37 96 82 66 30.32 30.24 30.10 10 10 6 16 8 34 0.27 Rain
6 46 44 42 45 43 40 100 97 89 30.24 30.13 30.08 9 4 2 30 20 41 4.56 Rain
7 48 45 42 47 44 41 100 93 86 30.06 29.88 29.72 10 5 2 22 16 39 4.33 Rain
8 48 42 36 43 37 34 100 83 61 30.02 29.93 29.86 10 10 4 20 11 31 0.40 Rain
9 44 40 36 39 36 34 97 86 71 30.18 30.01 29.85 10 10 4 9 4 - 0.41 Rain
10 46 42 37 44 40 36 100 92 87 30.31 30.27 30.19 10 10 5 17 7 23 0.31 Rain
11 46 44 42 43 40 36 97 83 68 30.27 30.25 30.17 10 10 5 17 12 25 0.14 Rain
12 44 43 42 42 40 37 97 91 81 30.20 30.17 30.14 10 6 3 22 13 31 1.67 Rain
13 52 46 37 45 38 32 100 80 50 30.42 30.29 30.15 10 8 2 15 8 - 0.36 Rain
14 57 46 37 41 37 34 96 72 45 30.38 30.27 30.20 10 10 10 14 8 21 0.00  
15 51 46 41 36 33 27 79 65 41 30.30 30.26 30.23 10 10 9 14 7 18 0.00  
16 44 42 39 41 38 35 96 86 76 30.30 30.29 30.25 10 9 5 8 4 16 0.49 Rain
17 53 47 42 41 39 37 93 76 57 30.24 30.16 30.12 10 10 10 13 6 22 0.01 Rain
18 50 46 41 41 37 32 87 74 52 30.17 30.14 30.11 10 10 10 16 6 - 0.00 Rain
19 55 46 36 40 38 34 97 72 50 30.17 30.10 30.01 10 10 10 12 3 16 0.00  
20 53 48 45 47 44 39 96 88 74 30.01 29.88 29.71 10 9 7 13 4 - 0.33 Rain
21 55 52 48 51 47 44 92 87 83 29.69 29.59 29.49 10 10 8 15 6 20 0.83 Rain
22 55 49 39 45 42 39 97 77 57 29.83 29.77 29.66 10 10 10 13 9 21 0.05 Rain
23 59 49 41 44 41 38 100 76 49 29.96 29.86 29.78 10 10 10 9 4 - 0.00  
24 64 50 37 45 43 37 100 73 50 30.19 30.08 29.97 10 10 10 13 4 - 0.00  
25 62 53 46 49 46 43 93 77 57 30.18 30.09 29.94 10 10 10 12 7 22 0.00  
26 53 50 48 48 47 43 100 91 71 29.92 29.84 29.82 10 8 2 15 7 23 0.27 Rain
27 52 49 46 46 44 39 100 87 63 30.00 29.92 29.82 10 10 8 14 7 23 0.07 Rain
28 53 48 44 45 43 40 100 85 66 30.04 30.00 29.97 10 10 6 13 5 22 0.20 Rain
29 48 46 44 46 44 41 100 91 76 30.04 29.97 29.87 10 9 6 20 11 37 0.74 Rain
30 51 48 46 49 46 43 100 93 86 29.96 29.88 29.84 10 6 2 21 15 30 1.84 Rain
31 52 48 46 48 46 43 100 90 74 30.01 29.93 29.86 10 8 2 20 9 26 0.55 Rain