Weather History for Petersburg, AK

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 42 °F 31 °F 17 °F
Mean Temperature 38 °F 27 °F 12 °F
Min Temperature 33 °F 23 °F 8 °F
Degree Days  
Heating Degree Days (base 65) 52 38 28 1173
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 37 °F 24 °F 1 °F
Precipitation  
Precipitation 0.97 in 0.10 in 0.00 in 3.00 in
Snowdepth - - - -
Wind  
Wind 17 mph 3 mph 0 mph
Gust Wind 38 mph 18 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.37 in 29.67 in 28.96 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 18, 2012 Rise Set
Actual Time 8:25 AM AKST 3:11 PM AKST
Civil Twilight 7:36 AM AKST 4:00 PM AKST
Nautical Twilight 6:46 AM AKST 4:51 PM AKST
Astronomical Twilight 5:59 AM AKST 5:38 PM AKST
Moon 11:01 AM AKST (12/18) 11:00 PM AKST (12/18)
Length of Visible Light 8h 24m
Length of Day
6h 45m
Waxing Crescent, 36% of the Moon is Illuminated
Dec 18
Waxing Crescent
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New

Weather History Calendar

Precipitation Actual month total 3.00 Average Month Total: 19.24
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Overcast
Actual:
26 | 24 0.00
Average:
36 | 29 0.55
Overcast
Actual:
26 | 24 0.00
Average:
36 | 29 0.55
Overcast
Actual:
32 | 28 0.00
Average:
36 | 29 0.55
Overcast
Actual:
30 | 26 0.00
Average:
36 | 29 0.55
Snow
Actual:
32 | 26 0.00
Average:
36 | 29 0.55
Overcast
Actual:
32 | 26 0.00
Average:
35 | 29 0.55
Partly Cloudy
Actual:
32 | 17 0.00
Average:
35 | 29 0.55
Partly Cloudy
Actual:
30 | 17 0.00
Average:
35 | 29 0.54
Overcast
Actual:
35 | 32 0.00
Average:
35 | 28 0.54
Mostly Cloudy
Actual:
35 | 32 0.00
Average:
35 | 28 0.54
Partly Cloudy
Actual:
37 | 28 0.00
Average:
34 | 28 0.54
Mostly Cloudy
Actual:
33 | 26 0.25
Average:
34 | 28 0.91
Mostly Cloudy
Actual:
37 | 33 0.19
Average:
34 | 28 0.53
Overcast
Actual:
37 | 32 0.97
Average:
34 | 28 0.52
Snow
Actual:
39 | 30 0.29
Average:
34 | 28 0.90
Partly Cloudy
Actual:
33 | 26 0.15
Average:
34 | 28 0.51
Partly Cloudy
Actual:
28 | 23 0.00
Average:
34 | 28 0.51
Partly Cloudy
Actual:
32 | 17 0.00
Average:
34 | 27 0.89
Overcast
Actual:
35 | 28 0.00
Average:
34 | 27 0.89
Partly Cloudy
Actual:
30 | 15 0.00
Average:
34 | 27 0.50
Scattered Clouds
Actual:
21 | 12 0.00
Average:
34 | 27 0.51
Partly Cloudy
Actual:
23 | 12 0.00
Average:
34 | 27 0.89
Scattered Clouds
Actual:
21 | 12 0.00
Average:
33 | 26 0.89
Scattered Clouds
Actual:
24 | 12 0.00
Average:
33 | 26 0.89
Partly Cloudy
Actual:
26 | 14 0.00
Average:
33 | 26 0.89
Clear
Actual:
17 | 8 0.00
Average:
33 | 25 0.51
Overcast
Actual:
33 | 14 0.06
Average:
32 | 25 0.51
Overcast
Actual:
32 | 26 0.19
Average:
32 | 25 0.50
Overcast
Actual:
35 | 30 0.00
Average:
32 | 24 0.50
Overcast
Actual:
42 | 33 0.57
Average:
32 | 24 0.49
Mostly Cloudy
Actual:
42 | 33 0.33
Average:
31 | 24 0.49
 

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
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 26 25 24 25 23 21 100 88 80 29.32 29.27 29.20 10 6 2 0 0 - 0.00  
2 26 25 24 25 23 21 100 90 80 29.27 29.17 29.13 9 2 0 0 0 - 0.00  
3 32 30 28 27 25 21 93 83 69 29.47 29.36 29.23 10 8 2 7 2 - 0.00  
4 30 28 26 28 26 25 93 90 86 29.47 29.26 29.11 10 5 2 7 2 - 0.00  
5 32 29 26 28 25 23 100 86 69 29.80 29.66 29.48 10 6 1 9 2 - 0.00 Snow
6 32 29 26 28 25 23 93 89 75 29.82 29.75 29.60 10 7 1 10 4 18 0.00  
7 32 24 17 27 23 16 93 90 75 30.14 29.91 29.65 10 9 2 7 2 - 0.00  
8 30 24 17 28 21 14 93 88 80 30.22 30.13 29.86 10 8 0 10 1 - 0.00  
9 35 34 32 34 32 28 100 90 81 30.05 29.94 29.84 10 6 2 9 3 16 0.00  
10 35 34 32 36 33 30 100 93 87 30.06 29.72 29.34 10 6 3 6 2 - 0.00  
11 37 32 28 36 32 27 100 91 81 29.87 29.59 29.34 10 8 0 7 2 - 0.00  
12 33 30 26 32 29 23 100 91 86 29.90 29.77 29.50 10 6 0 6 2 - 0.25  
13 37 35 33 34 32 30 100 89 81 29.68 29.55 29.44 10 9 3 10 3 - 0.19  
14 37 34 32 34 32 30 93 86 75 29.68 29.33 28.98 10 6 2 17 4 38 0.97  
15 39 34 30 34 31 28 100 86 70 29.25 29.11 28.96 10 8 2 14 4 17 0.29 Snow
16 33 30 26 30 29 21 100 91 80 29.26 29.24 29.23 10 7 2 6 0 - 0.15  
17 28 26 23 27 24 19 100 90 80 29.68 29.42 29.23 10 10 10 5 1 - 0.00  
18 32 24 17 21 18 16 93 80 55 29.70 29.55 29.27 10 10 2 8 2 - 0.00  
19 35 32 28 27 23 18 93 67 52 29.49 29.27 29.16 10 9 3 13 6 22 0.00  
20 30 22 15 27 20 9 93 84 73 29.82 29.66 29.49 10 10 7 6 2 - 0.00  
21 21 16 12 18 13 7 100 85 74 29.91 29.87 29.83 10 10 10 6 3 - 0.00  
22 23 18 12 18 14 7 100 85 63 29.84 29.74 29.68 10 10 10 6 3 - 0.00  
23 21 16 12 16 12 9 93 83 63 29.89 29.80 29.73 10 10 10 6 1 - 0.00  
24 24 18 12 16 11 7 86 71 50 30.08 30.02 29.93 10 10 10 7 3 - 0.00  
25 26 20 14 16 13 10 86 64 51 29.93 29.83 29.77 10 10 10 9 4 - 0.00  
26 17 12 8 14 10 1 100 84 67 29.94 29.89 29.80 10 10 10 6 3 - 0.00  
27 33 24 14 30 23 12 93 86 69 29.93 29.80 29.75 10 6 1 13 5 - 0.06  
28 32 29 26 30 27 25 100 92 86 30.11 29.92 29.81 10 6 1 8 4 - 0.19  
29 35 32 30 34 30 28 100 90 81 30.18 30.14 30.05 10 8 1 8 1 - 0.00  
30 42 38 33 37 34 30 87 80 70 30.05 29.93 29.81 10 9 6 10 4 22 0.57  
31 42 38 33 37 34 30 100 90 76 30.37 30.14 29.80 10 9 1 7 3 - 0.33