Weather History for Manassas, VA

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Tuesday, December 20, 2011

  Actual Average Record
Temperature  
Mean Temperature 49 °F -  
Max Temperature 57 °F 42 °F 60 °F (1997)
Min Temperature 41 °F 22 °F 10 °F (2000)
Degree Days  
Heating Degree Days 16    
Moisture  
Dew Point 34 °F    
Average Humidity 64    
Maximum Humidity 76    
Minimum Humidity 44    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.12 in    
Wind  
Wind Speed 1 mph (SSE)    
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

Dec. 20, 2011 Rise Set
Actual Time 7:23 AM EST 4:51 PM EST
Civil Twilight 6:53 AM EST 5:21 PM EST
Nautical Twilight 6:20 AM EST 5:54 PM EST
Astronomical Twilight 5:48 AM EST 6:27 PM EST
Moon 2:44 AM EST (12/20) 1:24 PM EST (12/20)
Length of Visible Light 10h 27m
Length of Day
9h 27m
Waning Crescent, 21% of the Moon is Illuminated
Dec 20
Waning Crescent
Dec 24
New
Jan 1
First Quarter
Jan 9
Full
Jan 16
Last Quarter

Hourly Weather History & Observations

Time (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:15 AM 41.0 °F - 30.2 °F 65% 30.07 in 10.0 mi Calm Calm - N/A   Partly Cloudy
12:35 AM 41.0 °F - 30.2 °F 65% 30.08 in 10.0 mi Calm Calm - N/A   Partly Cloudy
12:55 AM 44.6 °F - 30.2 °F 57% 30.08 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:35 AM 42.8 °F - 30.2 °F 61% 30.08 in 10.0 mi Calm Calm - N/A   Partly Cloudy
1:55 AM 42.8 °F - 30.2 °F 61% 30.10 in 10.0 mi Calm Calm - N/A   Clear
2:15 AM 42.8 °F - 30.2 °F 61% 30.10 in 10.0 mi Calm Calm - N/A   Scattered Clouds
2:35 AM 44.6 °F - 30.2 °F 57% 30.10 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:55 AM 42.8 °F - 32.0 °F 66% 30.11 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:15 AM 42.8 °F - 32.0 °F 66% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
3:35 AM 42.8 °F - 32.0 °F 66% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
3:55 AM 42.8 °F - 32.0 °F 66% 30.10 in 10.0 mi Calm Calm - N/A   Overcast
4:15 AM 42.8 °F - 33.8 °F 70% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
4:35 AM 42.8 °F - 32.0 °F 66% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
5:15 AM 42.8 °F - 33.8 °F 70% 30.12 in 10.0 mi Calm Calm - N/A   Overcast
5:35 AM 42.8 °F - 33.8 °F 70% 30.13 in 10.0 mi Calm Calm - N/A   Overcast
5:55 AM 42.8 °F - 33.8 °F 70% 30.14 in 10.0 mi Calm Calm - N/A   Overcast
8:45 AM 42.8 °F - 35.6 °F 76% 30.17 in 10.0 mi Calm Calm - N/A   Partly Cloudy
9:50 AM 48.2 °F - 33.8 °F 58% 30.18 in 10.0 mi Calm Calm - N/A   Scattered Clouds
10:55 AM 50.0 °F - 33.8 °F 54% 30.18 in 10.0 mi Calm Calm - N/A   Overcast
11:50 AM 53.6 °F - 35.6 °F 51% 30.17 in 10.0 mi Calm Calm - N/A   Scattered Clouds
12:45 PM 55.4 °F - 35.6 °F 47% 30.14 in 10.0 mi Calm Calm - N/A   Partly Cloudy
1:45 PM 55.4 °F - 35.6 °F 47% 30.12 in 10.0 mi SSW 3.5 mph - N/A   Clear
2:55 PM 57.2 °F - 35.6 °F 44% 30.11 in 10.0 mi South 5.8 mph - N/A   Clear
4:50 PM 48.2 °F - 35.6 °F 62% 30.12 in 10.0 mi SSE 5.8 mph - N/A   Clear
5:50 PM 48.2 °F - 33.8 °F 58% 30.12 in 10.0 mi SE 4.6 mph - N/A   Clear
6:50 PM 44.6 °F 41.4 °F 35.6 °F 71% 30.13 in 10.0 mi SSE 5.8 mph - N/A   Clear
7:45 PM 44.6 °F - 35.6 °F 71% 30.13 in 10.0 mi Calm Calm - N/A   Clear
9:45 PM 46.4 °F - 35.6 °F 66% 30.12 in 10.0 mi Calm Calm - N/A   Overcast
10:15 PM 44.6 °F - 37.4 °F 76% 30.11 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
10:35 PM 44.6 °F - 37.4 °F 76% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
10:55 PM 46.4 °F 44.3 °F 35.6 °F 66% 30.11 in 10.0 mi SSE 4.6 mph - N/A   Scattered Clouds
11:15 PM 46.4 °F - 35.6 °F 66% 30.11 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
11:35 PM 46.4 °F - 37.4 °F 71% 30.10 in 10.0 mi Calm Calm - N/A   Overcast
11:55 PM 44.6 °F - 37.4 °F 76% 30.10 in 10.0 mi Calm Calm - N/A   Mostly Cloudy