Weather History for Petersburg, AK

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Week of September 16, 2012 through September 22, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 66 °F 56 °F 51 °F
Mean Temperature 54 °F 49 °F 46 °F
Min Temperature 46 °F 42 °F 37 °F
Degree Days  
Heating Degree Days (base 65) 19 16 11 109
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 4 1 0 6
Dew Point  
Dew Point 55 °F 45 °F 36 °F
Precipitation  
Precipitation 0.00 in 0.00 in 0.00 in 0.00 in
Snowdepth - - - -
Wind  
Wind 7 mph 2 mph 0 mph
Gust Wind - - -
Sea Level Pressure  
Sea Level Pressure 30.42 in 30.18 in 29.99 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Sep. 19, 2012 Rise Set
Actual Time 6:32 AM AKDT 6:57 PM AKDT
Civil Twilight 5:54 AM AKDT 7:35 PM AKDT
Nautical Twilight 5:08 AM AKDT 8:20 PM AKDT
Astronomical Twilight 4:18 AM AKDT 9:09 PM AKDT
Moon 11:54 AM AKDT (9/19) 8:06 PM AKDT (9/19)
Length of Visible Light 13h 41m
Length of Day
12h 25m
Waxing Crescent, 18% of the Moon is Illuminated
Sep 19
Waxing Crescent
Sep 22
First Quarter
Sep 29
Full
Oct 7
Last Quarter
Oct 15
New

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  
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