Weather History for Petersburg, AK

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Tuesday, September 25, 2012

  Actual Average Record
Temperature  
Mean Temperature 46 °F -  
Max Temperature 53 °F 51 °F 69 °F (1989)
Min Temperature 39 °F 41 °F 33 °F (1984)
Degree Days  
Heating Degree Days 19    
Moisture  
Dew Point 42 °F    
Average Humidity 86    
Maximum Humidity 100    
Minimum Humidity 67    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.09 in    
Wind  
Wind Speed 2 mph (SE)    
Max Wind Speed 16 mph    
Max Gust Speed 24 mph    
Visibility 6 miles    
Events      
Averages and records for this station are not official NWS values.
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 25, 2012 Rise Set
Actual Time 6:44 AM AKDT 6:40 PM AKDT
Civil Twilight 6:06 AM AKDT 7:18 PM AKDT
Nautical Twilight 5:21 AM AKDT 8:03 PM AKDT
Astronomical Twilight 4:34 AM AKDT 8:50 PM AKDT
Moon 4:47 PM AKDT (9/25) 1:27 AM AKDT (9/25)
Length of Visible Light 13h 12m
Length of Day
11h 56m
Waxing Gibbous, 81% of the Moon is Illuminated
Sep 25
Waxing Gibbous
Sep 29
Full
Oct 7
Last Quarter
Oct 15
New
Oct 21
First Quarter

Hourly Weather History & Observations

Time (AKDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:16 AM 42.8 °F - 39.2 °F 87% 30.24 in 0.2 mi Calm Calm - N/A   Overcast
12:36 AM 42.8 °F - 39.2 °F 87% 30.24 in 0.2 mi Calm Calm - N/A   Overcast
12:56 AM 41.0 °F - 39.2 °F 93% 30.24 in 0.5 mi Calm Calm - N/A   Overcast
1:16 AM 42.8 °F - 42.8 °F 100% 30.23 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:36 AM 41.0 °F - 39.2 °F 93% 30.22 in 0.8 mi Calm Calm - N/A   Mostly Cloudy
1:56 AM 41.0 °F - 39.2 °F 93% 30.22 in 0.2 mi Calm Calm - N/A   Overcast
2:16 AM 41.0 °F - 39.2 °F 93% 30.21 in 0.2 mi Calm Calm - N/A   Overcast
2:36 AM 41.0 °F - 39.2 °F 93% 30.21 in 0.2 mi Calm Calm - N/A   Overcast
2:56 AM 39.2 °F - 37.4 °F 93% 30.21 in 0.5 mi Calm Calm - N/A   Overcast
3:16 AM 39.2 °F - 37.4 °F 93% 30.21 in 0.5 mi Calm Calm - N/A   Overcast
3:36 AM 39.2 °F - 39.2 °F 100% 30.21 in 0.2 mi Calm Calm - N/A   Overcast
3:56 AM 39.2 °F - 37.4 °F 93% 30.20 in 0.5 mi Calm Calm - N/A   Overcast
4:16 AM 39.2 °F - 37.4 °F 93% 30.19 in 0.8 mi Calm Calm - N/A   Overcast
4:36 AM 39.2 °F - 39.2 °F 100% 30.19 in 0.2 mi Calm Calm - N/A   Overcast
4:56 AM 41.0 °F - 39.2 °F 93% 30.18 in 0.2 mi Calm Calm - N/A   Overcast
5:16 AM 41.0 °F - 39.2 °F 93% 30.19 in 0.2 mi Calm Calm - N/A   Overcast
5:36 AM 41.0 °F - 39.2 °F 93% 30.18 in 0.5 mi Calm Calm - N/A   Overcast
5:56 AM 42.8 °F - 39.2 °F 87% 30.17 in 0.2 mi Calm Calm - N/A   Overcast
6:16 AM 42.8 °F - 39.2 °F 87% 30.17 in 0.2 mi Calm Calm - N/A   Unknown
6:36 AM 42.8 °F - 39.2 °F 87% 30.17 in 0.2 mi Calm Calm - N/A   Unknown
6:56 AM 42.8 °F - 39.2 °F 87% 30.16 in 0.2 mi Calm Calm - N/A   Unknown
7:16 AM 42.8 °F - 39.2 °F 87% 30.15 in 0.2 mi Calm Calm - N/A   Unknown
7:36 AM 42.8 °F - 41.0 °F 93% 30.15 in 0.2 mi Calm Calm - N/A   Unknown
7:56 AM 42.8 °F - 41.0 °F 93% 30.14 in 0.2 mi Calm Calm - N/A   Unknown
8:16 AM 42.8 °F 40.1 °F 41.0 °F 93% 30.13 in 0.5 mi SW 4.6 mph - N/A   Unknown
8:36 AM 44.6 °F 42.2 °F 42.8 °F 93% 30.12 in 0.8 mi WSW 4.6 mph - N/A   Unknown
8:56 AM 42.8 °F 40.1 °F 42.8 °F 100% 30.12 in 0.5 mi West 4.6 mph - N/A   Unknown
9:16 AM 42.8 °F 41.1 °F 41.0 °F 93% 30.12 in 0.5 mi WSW 3.5 mph - N/A   Unknown
9:36 AM 44.6 °F - 42.8 °F 93% 30.12 in 0.5 mi Calm Calm - N/A   Unknown
9:56 AM 44.6 °F - 42.8 °F 93% 30.11 in 0.8 mi Calm Calm - N/A   Overcast
10:16 AM 44.6 °F - 42.8 °F 93% 30.11 in 10.0 mi Calm Calm - N/A   Partly Cloudy
11:16 AM 46.4 °F 45.2 °F 44.6 °F 93% 30.10 in 10.0 mi WSW 3.5 mph - N/A   Partly Cloudy
11:56 AM 46.4 °F - 44.6 °F 93% 30.09 in 10.0 mi Calm Calm - N/A   Scattered Clouds
12:16 PM 48.2 °F - 44.6 °F 87% 30.08 in 10.0 mi Calm Calm - N/A   Scattered Clouds
12:36 PM 48.2 °F - 44.6 °F 87% 30.08 in 10.0 mi NNE 3.5 mph - N/A   Scattered Clouds
12:56 PM 50.0 °F - 44.6 °F 82% 30.07 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:16 PM 50.0 °F - 44.6 °F 82% 30.06 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:36 PM 51.8 °F - 46.4 °F 82% 30.06 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:56 PM 51.8 °F - 44.6 °F 76% 30.06 in 10.0 mi Calm Calm - N/A   Scattered Clouds
2:16 PM 51.8 °F - 44.6 °F 76% 30.06 in 10.0 mi West 4.6 mph - N/A   Scattered Clouds
2:36 PM 51.8 °F - 44.6 °F 76% 30.05 in 10.0 mi Calm Calm - N/A   Scattered Clouds
2:56 PM 51.8 °F - 44.6 °F 76% 30.05 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:16 PM 51.8 °F - 44.6 °F 76% 30.05 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:36 PM 53.6 °F - 46.4 °F 77% 30.05 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:56 PM 53.6 °F - 44.6 °F 72% 30.04 in 10.0 mi Calm Calm - N/A   Overcast
4:16 PM 51.8 °F - 44.6 °F 76% 30.04 in 10.0 mi Calm Calm - N/A   Overcast
4:36 PM 51.8 °F - 46.4 °F 82% 30.04 in 10.0 mi WSW 3.5 mph - N/A   Overcast
4:56 PM 51.8 °F - 44.6 °F 76% 30.04 in 10.0 mi Calm Calm - N/A   Overcast
5:16 PM 51.8 °F - 44.6 °F 76% 30.04 in 10.0 mi West 3.5 mph - N/A   Overcast
5:36 PM 51.8 °F - 42.8 °F 71% 30.04 in 10.0 mi NW 3.5 mph - N/A   Overcast
5:56 PM 50.0 °F - 42.8 °F 76% 30.03 in 10.0 mi ENE 4.6 mph - N/A   Overcast
6:16 PM 51.8 °F - 41.0 °F 67% 30.02 in 10.0 mi ENE 6.9 mph - N/A   Overcast
6:36 PM 50.0 °F - 42.8 °F 76% 30.02 in 10.0 mi East 5.8 mph - N/A   Overcast
6:56 PM 48.2 °F - 44.6 °F 87% 30.01 in 10.0 mi East 10.4 mph 21.9 mph N/A   Overcast
7:16 PM 48.2 °F - 42.8 °F 82% 30.00 in 10.0 mi ESE 16.1 mph 23.0 mph N/A   Overcast
7:36 PM 48.2 °F - 42.8 °F 82% 30.00 in 10.0 mi SSE 6.9 mph 24.2 mph N/A   Overcast
7:56 PM 48.2 °F - 42.8 °F 82% 29.99 in 10.0 mi East 9.2 mph - N/A   Overcast
8:36 PM 48.2 °F - 42.8 °F 82% 29.99 in 10.0 mi SE 8.1 mph 17.3 mph N/A   Overcast
8:56 PM 48.2 °F - 42.8 °F 82% 29.98 in 10.0 mi East 5.8 mph - N/A   Mostly Cloudy
9:16 PM 48.2 °F - 42.8 °F 82% 29.98 in 10.0 mi East 6.9 mph 18.4 mph N/A   Mostly Cloudy
9:36 PM 48.2 °F - 42.8 °F 82% 29.97 in 10.0 mi ESE 9.2 mph 20.7 mph N/A   Mostly Cloudy
9:56 PM 48.2 °F - 42.8 °F 82% 29.97 in 10.0 mi East 9.2 mph - N/A   Overcast
10:16 PM 48.2 °F - 42.8 °F 82% 29.97 in 8.0 mi East 10.4 mph - N/A   Mostly Cloudy
10:36 PM 48.2 °F - 42.8 °F 82% 29.97 in 7.0 mi ESE 6.9 mph - N/A   Overcast
10:56 PM 48.2 °F - 44.6 °F 87% 29.97 in 7.0 mi South 4.6 mph 16.1 mph N/A   Overcast
11:16 PM 48.2 °F - 42.8 °F 82% 29.97 in 6.0 mi ESE 6.9 mph - N/A   Overcast
11:36 PM 48.2 °F - 44.6 °F 87% 29.97 in 7.0 mi SSE 5.8 mph - N/A   Overcast
11:56 PM 48.2 °F - 44.6 °F 87% 29.97 in 3.0 mi SE 5.8 mph - N/A   Overcast