Bristow, VA

2:55 AM EST on February 27, 2017 (GMT -0500)
Manassas Regional-Davis

Weather History for KHEF - September, 2012

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Friday, September 14, 2012

  Actual Average Record
Temperature  
Mean Temperature 66 °F -  
Max Temperature 80 °F 77 °F 93 °F (1998)
Min Temperature 51 °F 55 °F 46 °F (2014)
Growing Degree Days 16 (Base 50)    
Moisture  
Dew Point 57 °F    
Average Humidity 93    
Maximum Humidity 100    
Minimum Humidity 45    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.22 in    
Wind  
Wind Speed 0 mph (WSW)    
Max Wind Speed 7 mph    
Max Gust Speed -    
Visibility 9 miles    
Events Fog    
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. 14, 2012 Rise Set
Actual Time 6:51 AM EDT 7:19 PM EDT
Civil Twilight 6:24 AM EDT 7:45 PM EDT
Nautical Twilight 5:52 AM EDT 8:17 PM EDT
Astronomical Twilight 5:20 AM EDT 8:49 PM EDT
Moon 5:13 AM EDT (9/14) 6:14 PM EDT (9/14)
Length of Visible Light 13h 21m
Length of Day
12h 28m
Waning Crescent, 3% of the Moon is Illuminated
Sep 14
Waning Crescent
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:15 AM 55.4 °F - 53.6 °F 94% 30.29 in 10.0 mi Calm Calm - N/A   Clear
12:35 AM 55.4 °F - 55.4 °F 100% 30.29 in 10.0 mi Calm Calm - N/A   Clear
12:55 AM 55.4 °F - 53.6 °F 94% 30.29 in 10.0 mi Calm Calm - N/A   Clear
1:15 AM 55.4 °F - 55.4 °F 100% 30.29 in 10.0 mi Calm Calm - N/A   Clear
1:35 AM 55.4 °F - 55.4 °F 100% 30.29 in 10.0 mi Calm Calm - N/A   Clear
1:55 AM 53.6 °F - 53.6 °F 100% 30.29 in 10.0 mi Calm Calm - N/A   Clear
2:15 AM 53.6 °F - 53.6 °F 100% 30.29 in 10.0 mi Calm Calm - N/A   Clear
2:35 AM 53.6 °F - 51.8 °F 94% 30.29 in 10.0 mi Calm Calm - N/A   Clear
2:55 AM 53.6 °F - 51.8 °F 94% 30.28 in 3.0 mi Calm Calm - N/A   Clear
3:15 AM 53.6 °F - 51.8 °F 94% 30.28 in 10.0 mi Calm Calm - N/A   Clear
3:35 AM 53.6 °F - 51.8 °F 94% 30.28 in 10.0 mi Calm Calm - N/A   Clear
3:55 AM 53.6 °F - 53.6 °F 100% 30.27 in 10.0 mi Calm Calm - N/A   Clear
4:15 AM 51.8 °F - 51.8 °F 100% 30.27 in 10.0 mi Calm Calm - N/A   Clear
4:35 AM 51.8 °F - 51.8 °F 100% 30.27 in 10.0 mi Calm Calm - N/A   Clear
4:55 AM 51.8 °F - 51.8 °F 100% 30.27 in 10.0 mi Calm Calm - N/A   Clear
5:15 AM 51.8 °F - 51.8 °F 100% 30.26 in 10.0 mi Calm Calm - N/A   Clear
5:35 AM 51.8 °F - 51.8 °F 100% 30.26 in 10.0 mi Calm Calm - N/A   Clear
5:55 AM 51.8 °F - 50.0 °F 94% 30.26 in 7.0 mi Calm Calm - N/A   Clear
6:15 AM 51.8 °F - 51.8 °F 100% 30.26 in 7.0 mi Calm Calm - N/A   Clear
6:55 AM 51.8 °F - 51.8 °F 100% 30.27 in 0.2 mi Calm Calm - N/A Fog Fog
8:45 AM 55.4 °F - 55.4 °F 100% 30.26 in 7.0 mi Calm Calm - N/A   Scattered Clouds
9:55 AM 62.6 °F - 60.8 °F 94% 30.26 in 10.0 mi Calm Calm - N/A   Clear
1:45 PM 80.6 °F 81.8 °F 62.6 °F 54% 30.19 in 10.0 mi WSW 6.9 mph - N/A   Clear
2:45 PM 80.6 °F 80.8 °F 57.2 °F 45% 30.17 in 10.0 mi West 6.9 mph - N/A   Clear
3:55 PM 80.6 °F 81.5 °F 60.8 °F 51% 30.15 in 10.0 mi SW 5.8 mph - N/A   Clear
7:55 PM 68.0 °F - 62.6 °F 83% 30.13 in 10.0 mi Calm Calm - N/A   Clear
8:15 PM 68.0 °F - 62.6 °F 83% 30.14 in 10.0 mi Calm Calm - N/A   Clear
8:35 PM 66.2 °F - 62.6 °F 88% 30.14 in 10.0 mi Calm Calm - N/A   Clear
8:55 PM 64.4 °F - 62.6 °F 94% 30.13 in 10.0 mi Calm Calm - N/A   Clear
9:15 PM 64.4 °F - 62.6 °F 94% 30.14 in 10.0 mi Calm Calm - N/A   Clear
9:35 PM 62.6 °F - 62.6 °F 100% 30.13 in 10.0 mi Calm Calm - N/A   Clear
9:55 PM 62.6 °F - 60.8 °F 94% 30.13 in 10.0 mi Calm Calm - N/A   Clear
10:15 PM 62.6 °F - 60.8 °F 94% 30.13 in 10.0 mi Calm Calm - N/A   Clear
10:35 PM 62.6 °F - 62.6 °F 100% 30.13 in 10.0 mi Calm Calm - N/A   Clear
10:55 PM 60.8 °F - 60.8 °F 100% 30.13 in 10.0 mi Calm Calm - N/A   Clear
11:15 PM 60.8 °F - 60.8 °F 100% 30.13 in 10.0 mi Calm Calm - N/A   Clear
11:35 PM 60.8 °F - 60.8 °F 100% 30.13 in 10.0 mi Calm Calm - N/A   Clear
11:55 PM 60.8 °F - 60.8 °F 100% 30.12 in 10.0 mi Calm Calm - N/A   Clear