Weather History for Petersburg, AK

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Week of September 9, 2012 through September 15, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 55 °F 52 °F 50 °F
Mean Temperature 52 °F 49 °F 47 °F
Min Temperature 50 °F 46 °F 44 °F
Degree Days  
Heating Degree Days (base 65) 18 16 12 111
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 2 0 0 2
Dew Point  
Dew Point 52 °F 46 °F 39 °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 29.98 in 29.46 in

Weekly Weather History Graph

Weekly Weather History Graph

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Date:

Astronomy

Sep. 13, 2012 Rise Set
Actual Time 6:20 AM AKDT 7:13 PM AKDT
Civil Twilight 5:41 AM AKDT 7:52 PM AKDT
Nautical Twilight 4:54 AM AKDT 8:38 PM AKDT
Astronomical Twilight 4:02 AM AKDT 9:30 PM AKDT
Moon 3:26 AM AKDT (9/13) 5:53 PM AKDT (9/13)
Length of Visible Light 14h 10m
Length of Day
12h 53m
Waning Crescent, 6% of the Moon is Illuminated
Sep 13
Waning Crescent
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 7
Last Quarter

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  
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