Weather History for Petersburg, AK

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 66 °F 55 °F 48 °F
Mean Temperature 54 °F 50 °F 46 °F
Min Temperature 51 °F 45 °F 37 °F
Degree Days  
Heating Degree Days (base 65) 19 15 11 453
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 4 1 0 28
Dew Point  
Dew Point 55 °F 46 °F 36 °F
Precipitation  
Precipitation 0.00 in 0.00 in 0.00 in 0.00 in
Snowdepth - - - -
Wind  
Wind 25 mph 2 mph 0 mph
Gust Wind 37 mph 20 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.42 in 30.07 in 29.42 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 14, 2012 Rise Set
Actual Time 6:22 AM AKDT 7:10 PM AKDT
Civil Twilight 5:43 AM AKDT 7:49 PM AKDT
Nautical Twilight 4:56 AM AKDT 8:35 PM AKDT
Astronomical Twilight 4:05 AM AKDT 9:26 PM AKDT
Moon 4:46 AM AKDT (9/14) 6:11 PM AKDT (9/14)
Length of Visible Light 14h 05m
Length of Day
12h 48m
Waning Crescent, 2% of the Moon is Illuminated
Sep 14
Waning Crescent
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 7
Last Quarter

Weather History Calendar

Precipitation Actual month total 0.00 Average Month Total: 20.69
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
59 | 42 0.00
Average:
56 | 45 0.58
Mostly Cloudy
Actual:
57 | 48 0.00
Average:
55 | 45 0.59
Overcast
Actual:
55 | 50 0.00
Average:
55 | 44 0.59
Mostly Cloudy
Actual:
57 | 50 0.00
Average:
55 | 44 0.60
Fog
Actual:
57 | 46 0.00
Average:
54 | 44 0.60
Partly Cloudy
Actual:
60 | 44 0.00
Average:
54 | 44 0.61
Partly Cloudy
Actual:
60 | 39 0.00
Average:
54 | 44 0.61
Overcast
Actual:
55 | 51 0.00
Average:
54 | 44 0.62
Mostly Cloudy
Actual:
51 | 46 0.00
Average:
54 | 43 0.63
Mostly Cloudy
Actual:
50 | 46 0.00
Average:
53 | 43 1.83
Overcast
Actual:
50 | 44 0.00
Average:
53 | 43 0.65
Overcast
Actual:
51 | 48 0.00
Average:
53 | 43 0.66
Overcast
Actual:
55 | 50 0.00
Average:
53 | 43 0.66
Mostly Cloudy
Actual:
53 | 46 0.00
Average:
53 | 43 0.67
Mostly Cloudy
Actual:
55 | 44 0.00
Average:
53 | 43 0.68
Partly Cloudy
Actual:
55 | 41 0.00
Average:
53 | 43 0.68
Overcast
Actual:
51 | 42 0.00
Average:
53 | 43 0.69
Partly Cloudy
Actual:
51 | 41 0.00
Average:
52 | 43 0.69
Partly Cloudy
Actual:
55 | 37 0.00
Average:
52 | 43 0.69
Scattered Clouds
Actual:
57 | 44 0.00
Average:
52 | 43 0.69
Partly Cloudy
Actual:
66 | 42 0.00
Average:
52 | 43 0.68
Partly Cloudy
Actual:
59 | 46 0.00
Average:
52 | 42 0.68
Mostly Cloudy
Actual:
55 | 50 0.00
Average:
51 | 42 0.68
Partly Cloudy
Actual:
55 | 42 0.00
Average:
51 | 41 0.67
Partly Cloudy
Actual:
53 | 39 0.00
Average:
51 | 41 0.67
Mostly Cloudy
Actual:
57 | 46 0.00
Average:
50 | 41 0.66
Mostly Cloudy
Actual:
55 | 46 0.00
Average:
50 | 40 0.66
Overcast
Actual:
51 | 46 0.00
Average:
50 | 40 0.66
Overcast
Actual:
48 | 44 0.00
Average:
50 | 40 0.66
Mostly Cloudy
Actual:
53 | 42 0.00
Average:
50 | 40 0.65
 

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
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 59 50 42 48 45 39 94 82 59 29.98 29.94 29.91 10 10 3 13 2 20 0.00  
2 57 52 48 48 48 45 100 86 67 30.15 30.09 29.96 10 8 0 7 1 - 0.00  
3 55 52 50 52 50 48 94 93 88 30.21 30.17 30.12 10 6 4 6 0 - 0.00  
4 57 54 50 54 51 48 100 92 82 30.29 30.21 30.14 10 8 3 7 2 - 0.00  
5 57 52 46 52 48 45 100 89 72 30.32 30.29 30.24 10 6 0 6 2 - 0.00 Fog
6 60 52 44 50 46 39 94 79 45 30.35 30.29 30.23 10 9 2 8 2 - 0.00  
7 60 50 39 50 44 37 94 79 52 30.35 30.26 30.09 10 9 0 8 3 - 0.00  
8 55 53 51 55 52 46 100 95 82 30.09 29.82 29.54 10 5 2 14 1 25 0.00  
9 51 48 46 48 45 39 93 87 76 29.67 29.54 29.46 10 9 5 14 4 25 0.00  
10 50 48 46 48 45 43 100 91 82 30.03 29.86 29.67 10 10 7 6 1 - 0.00  
11 50 47 44 46 44 39 100 90 71 30.18 30.11 30.04 10 8 0 14 2 20 0.00  
12 51 50 48 50 48 45 94 90 82 30.07 30.02 29.95 10 6 3 6 1 - 0.00  
13 55 52 50 52 50 43 100 89 76 30.03 29.82 29.53 10 6 3 25 3 37 0.00  
14 53 50 46 48 45 43 94 81 71 30.30 30.16 29.92 10 9 0 14 5 20 0.00  
15 55 50 44 48 45 43 100 87 67 30.42 30.38 30.30 10 8 0 6 1 - 0.00  
16 55 48 41 46 43 39 100 86 67 30.42 30.35 30.25 10 5 0 6 1 - 0.00  
17 51 46 42 48 46 39 100 93 87 30.25 30.17 30.13 10 5 0 7 1 - 0.00  
18 51 46 41 46 43 39 100 90 71 30.29 30.25 30.20 10 6 0 7 3 - 0.00  
19 55 46 37 48 42 36 100 87 67 30.31 30.27 30.24 10 8 0 6 2 - 0.00  
20 57 50 44 50 46 41 100 85 72 30.27 30.12 30.01 10 10 10 7 3 - 0.00  
21 66 54 42 55 48 39 100 86 64 30.05 30.03 30.01 10 6 0 6 1 - 0.00  
22 59 52 46 52 48 43 100 79 59 30.07 30.04 29.99 10 9 0 7 1 - 0.00  
23 55 53 50 54 50 48 100 90 82 30.11 30.07 30.04 10 9 0 7 2 - 0.00  
24 55 50 42 48 46 41 100 89 67 30.24 30.19 30.11 10 7 0 6 1 - 0.00  
25 53 46 39 46 42 37 100 86 67 30.24 30.09 29.97 10 6 0 16 2 24 0.00  
26 57 52 46 50 47 45 93 85 67 30.00 29.83 29.52 10 9 3 17 3 29 0.00  
27 55 50 46 52 46 43 93 83 67 29.79 29.66 29.42 10 10 5 16 5 30 0.00  
28 51 48 46 46 45 43 93 88 82 29.92 29.85 29.78 10 10 6 8 1 - 0.00  
29 48 46 44 45 44 43 100 90 82 30.10 30.00 29.92 10 9 5 7 2 - 0.00  
30 53 48 42 48 42 39 100 88 71 30.18 30.07 29.80 10 10 7 6 2 - 0.00