Weather History for Petersburg, AK

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Sunday, September 18, 2011

  Actual Average Record
Temperature  
Mean Temperature 48 °F -  
Max Temperature 51 °F 52 °F 63 °F (1986)
Min Temperature 46 °F 43 °F 33 °F (1983)
Degree Days  
Heating Degree Days 16    
Moisture  
Dew Point 45 °F    
Average Humidity 91    
Maximum Humidity 93    
Minimum Humidity 82    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 29.39 in    
Wind  
Wind Speed 3 mph (East)    
Max Wind Speed 7 mph    
Max Gust Speed -    
Visibility 9 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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Astronomy

Sep. 18, 2011 Rise Set
Actual Time 6:28 AM AKDT 7:02 PM AKDT
Civil Twilight 5:50 AM AKDT 7:40 PM AKDT
Nautical Twilight 5:04 AM AKDT 8:26 PM AKDT
Astronomical Twilight 4:14 AM AKDT 9:15 PM AKDT
Moon 8:58 PM AKDT (9/18) 1:57 PM AKDT (9/18)
Length of Visible Light 13h 49m
Length of Day
12h 33m
Waning Gibbous, 67% of the Moon is Illuminated
Sep 18
Waning Gibbous
Sep 20
Last Quarter
Sep 27
New
Oct 3
First Quarter
Oct 11
Full

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 48.2 °F - 44.6 °F 87% 29.43 in 10.0 mi Calm Calm - N/A   Overcast
12:36 AM 46.4 °F - 44.6 °F 93% 29.42 in 7.0 mi Calm Calm - N/A   Overcast
12:56 AM 46.4 °F 45.2 °F 44.6 °F 93% 29.41 in 10.0 mi ENE 3.5 mph - N/A   Overcast
1:16 AM 46.4 °F 45.2 °F 44.6 °F 93% 29.40 in 10.0 mi East 3.5 mph - N/A   Overcast
1:36 AM 46.4 °F 44.3 °F 44.6 °F 93% 29.38 in 10.0 mi SE 4.6 mph - N/A   Overcast
1:56 AM 46.4 °F 43.5 °F 44.6 °F 93% 29.37 in 10.0 mi SE 5.8 mph - N/A   Overcast
2:16 AM 46.4 °F 42.9 °F 44.6 °F 93% 29.36 in 10.0 mi SE 6.9 mph - N/A   Overcast
2:36 AM 46.4 °F 44.3 °F 42.8 °F 87% 29.36 in 10.0 mi WSW 4.6 mph - N/A   Overcast
2:56 AM 46.4 °F - 44.6 °F 93% 29.35 in 10.0 mi Calm Calm - N/A   Overcast
3:36 AM 46.4 °F - 44.6 °F 93% 29.33 in 10.0 mi Calm Calm - N/A   Overcast
3:56 AM 46.4 °F - 44.6 °F 93% 29.32 in 10.0 mi Calm Calm - N/A   Overcast
4:16 AM 46.4 °F 43.5 °F 44.6 °F 93% 29.31 in 10.0 mi SSE 5.8 mph - N/A   Overcast
4:36 AM 46.4 °F 44.3 °F 44.6 °F 93% 29.30 in 10.0 mi East 4.6 mph - N/A   Overcast
4:56 AM 46.4 °F 45.2 °F 44.6 °F 93% 29.30 in 10.0 mi ENE 3.5 mph - N/A   Overcast
5:16 AM 46.4 °F 45.2 °F 44.6 °F 93% 29.29 in 10.0 mi ENE 3.5 mph - N/A   Overcast
5:36 AM 46.4 °F 43.5 °F 44.6 °F 93% 29.28 in 10.0 mi East 5.8 mph - N/A   Overcast
5:56 AM 46.4 °F 43.5 °F 44.6 °F 93% 29.27 in 10.0 mi East 5.8 mph - N/A   Mostly Cloudy
6:16 AM 46.4 °F 43.5 °F 44.6 °F 93% 29.26 in 10.0 mi East 5.8 mph - N/A   Mostly Cloudy
6:36 AM 46.4 °F 44.3 °F 44.6 °F 93% 29.26 in 10.0 mi East 4.6 mph - N/A   Mostly Cloudy
6:56 AM 46.4 °F 45.2 °F 44.6 °F 93% 29.27 in 10.0 mi West 3.5 mph - N/A   Overcast
7:16 AM 46.4 °F 45.2 °F 44.6 °F 93% 29.26 in 10.0 mi South 3.5 mph - N/A   Overcast
7:36 AM 46.4 °F 44.3 °F 42.8 °F 87% 29.26 in 10.0 mi West 4.6 mph - N/A   Overcast
7:56 AM 46.4 °F - 44.6 °F 93% 29.27 in 10.0 mi Calm Calm - N/A   Overcast
8:16 AM 46.4 °F - 44.6 °F 93% 29.28 in 10.0 mi Calm Calm - N/A   Overcast
8:36 AM 46.4 °F - 44.6 °F 93% 29.29 in 10.0 mi Calm Calm - N/A   Overcast
8:56 AM 46.4 °F - 44.6 °F 93% 29.29 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:16 AM 46.4 °F - 44.6 °F 93% 29.29 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:36 AM 48.2 °F - 46.4 °F 93% 29.29 in 10.0 mi East 4.6 mph - N/A   Mostly Cloudy
9:56 AM 46.4 °F 45.2 °F 44.6 °F 93% 29.30 in 10.0 mi East 3.5 mph - N/A   Mostly Cloudy
10:16 AM 48.2 °F - 44.6 °F 87% 29.32 in 10.0 mi ENE 3.5 mph - N/A   Mostly Cloudy
10:36 AM 46.4 °F - 44.6 °F 93% 29.32 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
10:56 AM 46.4 °F - 44.6 °F 93% 29.33 in 7.0 mi Calm Calm - N/A   Overcast
11:16 AM 48.2 °F - 44.6 °F 87% 29.34 in 7.0 mi Calm Calm - N/A   Overcast
11:36 AM 48.2 °F - 46.4 °F 93% 29.35 in 7.0 mi Calm Calm - N/A   Overcast
11:56 AM 48.2 °F - 46.4 °F 93% 29.36 in 10.0 mi ENE 4.6 mph - N/A   Overcast
12:16 PM 48.2 °F - 46.4 °F 93% 29.37 in 10.0 mi ENE 5.8 mph - N/A   Overcast
12:36 PM 51.8 °F - 48.2 °F 88% 29.38 in 10.0 mi East 4.6 mph - N/A   Overcast
12:56 PM 48.2 °F - 46.4 °F 93% 29.40 in 10.0 mi NE 4.6 mph - N/A   Mostly Cloudy
1:16 PM 48.2 °F - 46.4 °F 93% 29.41 in 10.0 mi ENE 3.5 mph - N/A   Mostly Cloudy
1:36 PM 50.0 °F - 46.4 °F 87% 29.42 in 10.0 mi East 4.6 mph - N/A   Mostly Cloudy
1:56 PM 50.0 °F - 46.4 °F 87% 29.43 in 10.0 mi NNE 3.5 mph - N/A   Overcast
2:16 PM 51.8 °F - 46.4 °F 82% 29.44 in 10.0 mi NE 5.8 mph - N/A   Overcast
2:36 PM 50.0 °F - 46.4 °F 87% 29.45 in 10.0 mi NNE 3.5 mph - N/A   Overcast
2:56 PM 50.0 °F - 46.4 °F 87% 29.46 in 10.0 mi East 5.8 mph - N/A   Overcast
3:16 PM 48.2 °F - 46.4 °F 93% 29.48 in 10.0 mi East 4.6 mph - N/A   Overcast
3:36 PM 50.0 °F - 46.4 °F 87% 29.49 in 10.0 mi North 4.6 mph - N/A   Overcast
3:56 PM 50.0 °F - 46.4 °F 87% 29.51 in 10.0 mi Calm Calm - N/A   Overcast
4:16 PM 50.0 °F - 46.4 °F 87% 29.52 in 10.0 mi Calm Calm - N/A   Overcast
4:36 PM 50.0 °F - 46.4 °F 87% 29.54 in 10.0 mi SSW 3.5 mph - N/A   Overcast
4:56 PM 50.0 °F - 46.4 °F 87% 29.56 in 7.0 mi WSW 3.5 mph - N/A   Overcast
5:16 PM 50.0 °F - 46.4 °F 87% 29.59 in 7.0 mi WSW 3.5 mph - N/A   Overcast
5:36 PM 50.0 °F - 46.4 °F 87% 29.60 in 5.0 mi Calm Calm - N/A   Overcast
5:56 PM 48.2 °F - 46.4 °F 93% 29.62 in 7.0 mi East 3.5 mph - N/A   Overcast
6:16 PM 48.2 °F - 46.4 °F 93% 29.63 in 7.0 mi ENE 3.5 mph - N/A   Overcast
6:36 PM 48.2 °F - 46.4 °F 93% 29.65 in 7.0 mi Calm Calm - N/A   Overcast
6:56 PM 48.2 °F - 46.4 °F 93% 29.66 in 3.0 mi Calm Calm - N/A   Overcast
7:16 PM 48.2 °F - 46.4 °F 93% 29.68 in 3.0 mi Calm Calm - N/A   Overcast
7:36 PM 48.2 °F - 46.4 °F 93% 29.69 in 3.0 mi Calm Calm - N/A   Overcast
7:56 PM 48.2 °F - 46.4 °F 93% 29.71 in 3.0 mi Calm Calm - N/A   Overcast
8:16 PM 48.2 °F - 46.4 °F 93% 29.72 in 3.0 mi NW 3.5 mph - N/A   Overcast
8:36 PM 48.2 °F - 46.4 °F 93% 29.74 in 3.0 mi Calm Calm - N/A   Overcast
8:56 PM 48.2 °F - 46.4 °F 93% 29.75 in 3.0 mi Calm Calm - N/A   Overcast
9:16 PM 48.2 °F - 46.4 °F 93% 29.76 in 3.0 mi Calm Calm - N/A   Overcast
9:36 PM 48.2 °F - 46.4 °F 93% 29.78 in 3.0 mi Calm Calm - N/A   Overcast
9:56 PM 48.2 °F - 46.4 °F 93% 29.79 in 5.0 mi ENE 3.5 mph - N/A   Overcast
10:16 PM 48.2 °F - 46.4 °F 93% 29.80 in 10.0 mi NE 3.5 mph - N/A   Overcast
10:36 PM 48.2 °F - 46.4 °F 93% 29.82 in 10.0 mi Calm Calm - N/A   Overcast
10:56 PM 48.2 °F - 46.4 °F 93% 29.83 in 10.0 mi Calm Calm - N/A   Overcast
11:16 PM 48.2 °F - 46.4 °F 93% 29.85 in 10.0 mi SW 4.6 mph - N/A   Overcast
11:36 PM 50.0 °F - 46.4 °F 87% 29.86 in 10.0 mi South 5.8 mph - N/A   Overcast
11:56 PM 50.0 °F - 44.6 °F 82% 29.87 in 10.0 mi SSW 3.5 mph - N/A   Overcast