Weather History for Fort Belvoir, VA

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Monday, August 18, 2014

  Actual Average Record
Temperature  
Mean Temperature 72 °F -  
Max Temperature 82 °F 87 °F 96 °F (1999)
Min Temperature 64 °F 65 °F 59 °F (2007)
Cooling Degree Days 8    
Growing Degree Days 22 (Base 50)    
Moisture  
Dew Point 65 °F    
Average Humidity 78    
Maximum Humidity 96    
Minimum Humidity 55    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 29.90 in    
Wind  
Wind Speed 1 mph (ESE)    
Max Wind Speed 6 mph    
Max Gust Speed -    
Visibility 10 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

Aug. 18, 2014 Rise Set
Actual Time 6:25 AM EDT 7:59 PM EDT
Civil Twilight 5:57 AM EDT 8:27 PM EDT
Nautical Twilight 5:23 AM EDT 9:01 PM EDT
Astronomical Twilight 4:47 AM EDT 9:36 PM EDT
Moon 12:31 AM EDT (8/18) 2:59 PM EDT (8/18)
Length of Visible Light 14h 30m
Length of Day
13h 33m
Last Quarter, 38% of the Moon is Illuminated
Aug 18
Last Quarter
Aug 25
New
Sep 2
First Quarter
Sep 8
Full
Sep 15
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
12:53 AM 69.8 °F - 68.0 °F 94% 29.92 in 9.0 mi SE 2.3 mph - N/A   Clear
12:58 AM 69.6 °F - 68.0 °F 95% 29.93 in 10.0 mi Calm Calm - N/A   Clear
1:58 AM 70.9 °F - 65.5 °F 83% 29.94 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:58 AM 69.1 °F - 65.7 °F 89% 29.93 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:58 AM 67.1 °F - 65.1 °F 93% 29.93 in 10.0 mi Calm Calm - N/A   Clear
4:23 AM 66.2 °F - 64.4 °F 94% 29.91 in 9.0 mi Calm Calm - N/A   Clear
4:53 AM 66.2 °F - 64.4 °F 94% 29.90 in 9.0 mi Calm Calm - N/A   Clear
4:58 AM 65.7 °F - 64.2 °F 95% 29.92 in 10.0 mi Calm Calm - N/A   Clear
5:58 AM 64.4 °F - 63.1 °F 96% 29.93 in 9.0 mi Calm Calm - N/A   Partly Cloudy
6:08 AM 64.4 °F - 62.6 °F 94% 29.93 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:58 AM 65.3 °F - 63.9 °F 95% 29.95 in 10.0 mi Calm Calm - N/A   Overcast
7:58 AM 67.5 °F - 65.7 °F 94% 29.96 in 10.0 mi Calm Calm - N/A   Scattered Clouds
8:58 AM 71.6 °F - 64.2 °F 77% 29.95 in 10.0 mi Variable 1.2 mph - N/A   Scattered Clouds
9:58 AM 73.4 °F - 62.8 °F 69% 29.94 in 10.0 mi ESE 3.5 mph - N/A   Scattered Clouds
10:58 AM 77.2 °F - 63.3 °F 62% 29.94 in 10.0 mi Variable 3.5 mph - N/A   Clear
11:58 AM 80.1 °F 81.7 °F 64.2 °F 58% 29.93 in 10.0 mi ESE 4.6 mph - N/A   Clear
12:58 PM 80.8 °F 82.4 °F 64.4 °F 57% 29.91 in 10.0 mi East 5.8 mph - N/A   Partly Cloudy
1:58 PM 81.7 °F 83.2 °F 64.2 °F 55% 29.89 in 10.0 mi Variable 1.2 mph - N/A   Partly Cloudy
2:58 PM 80.6 °F 82.4 °F 64.9 °F 59% 29.87 in 10.0 mi Variable 3.5 mph - N/A   Clear
3:58 PM 79.9 °F - 65.1 °F 61% 29.85 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:58 PM 80.1 °F 82.1 °F 66.2 °F 62% 29.84 in 10.0 mi SE 4.6 mph - N/A   Partly Cloudy
5:58 PM 81.1 °F 83.2 °F 66.0 °F 60% 29.82 in 10.0 mi ESE 4.6 mph - N/A   Clear
6:58 PM 78.3 °F - 65.3 °F 64% 29.83 in 10.0 mi Variable 2.3 mph - N/A   Partly Cloudy
7:58 PM 77.4 °F - 65.3 °F 66% 29.84 in 10.0 mi Variable 1.2 mph - N/A   Overcast
8:58 PM 76.5 °F - 66.4 °F 71% 29.85 in 10.0 mi ESE 4.6 mph - N/A   Mostly Cloudy
9:58 PM 75.4 °F - 67.5 °F 76% 29.85 in 10.0 mi ESE 3.5 mph - N/A   Scattered Clouds
10:58 PM 74.5 °F - 68.4 °F 81% 29.85 in 10.0 mi ESE 3.5 mph - N/A   Scattered Clouds
11:53 PM 73.4 °F - 68.0 °F 83% 29.84 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
11:58 PM 74.1 °F - 68.4 °F 82% 29.85 in 10.0 mi Calm Calm - N/A   Mostly Cloudy