Weather History for Leesburg, VA

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Monday, December 31, 2012

  Actual Average (KIAD) Record (KIAD)
Temperature  
Mean Temperature 32 °F 34 °F  
Max Temperature 37 °F 43 °F 73 °F (1992)
Min Temperature 26 °F 24 °F 1 °F (1993)
Degree Days  
Heating Degree Days 34 31  
Month to date heating degree days 882  
Since 1 July heating degree days 1798  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 1178  
Moisture  
Dew Point 26 °F    
Average Humidity 78    
Maximum Humidity 93    
Minimum Humidity 65    
Precipitation  
Precipitation 0.00 in 0.07 in 1.90 in (1975)
Month to date precipitation 2.96  
Year to date precipitation 41.54  
Snow  
Snow 0.00 in 0.10 in 8.50 in (1970)
Month to date snowfall 3.5  
Since 1 July snowfall 4.0  
Snow Depth -    
Sea Level Pressure  
Sea Level Pressure 30.18 in    
Wind  
Wind Speed 3 mph (SW)    
Max Wind Speed 7 mph    
Max Gust Speed -    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 31, 2012 Rise Set
Actual Time 7:29 AM EST 4:57 PM EST
Civil Twilight 6:59 AM EST 5:27 PM EST
Nautical Twilight 6:25 AM EST 6:01 PM EST
Astronomical Twilight 5:53 AM EST 6:33 PM EST
Moon 8:24 PM EST (12/31) 9:11 AM EST (12/31)
Length of Visible Light 10h 28m
Length of Day
9h 28m
Waning Gibbous, 90% of the Moon is Illuminated
Dec 31
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

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 32.0 °F - 23.0 °F 69% 30.32 in 10.0 mi North - - N/A   Clear
12:35 AM 32.0 °F - 23.0 °F 69% 30.31 in 10.0 mi North - - N/A   Clear
1:15 AM 30.2 °F 24.3 °F 21.2 °F 69% 30.31 in 10.0 mi WNW 5.8 mph - N/A   Clear
1:35 AM 30.2 °F 25.4 °F 23.0 °F 75% 30.32 in 10.0 mi WNW 4.6 mph - N/A   Clear
1:55 AM 28.4 °F 23.3 °F 21.2 °F 74% 30.32 in 10.0 mi WNW 4.6 mph - N/A   Clear
2:15 AM 28.4 °F 23.3 °F 23.0 °F 80% 30.32 in 10.0 mi NW 4.6 mph - N/A   Clear
2:35 AM 28.4 °F 24.6 °F 21.2 °F 74% 30.32 in 10.0 mi NW 3.5 mph - N/A   Clear
2:55 AM 28.4 °F - 21.2 °F 74% 30.32 in 10.0 mi Calm Calm - N/A   Clear
3:15 AM 26.6 °F - 23.0 °F 86% 30.30 in 10.0 mi Calm Calm - N/A   Clear
3:35 AM 26.6 °F 21.2 °F 23.0 °F 86% 30.30 in 10.0 mi SW 4.6 mph - N/A   Clear
3:55 AM 28.4 °F 22.2 °F 23.0 °F 80% 30.30 in 10.0 mi SW 5.8 mph - N/A   Clear
4:15 AM 26.6 °F 21.2 °F 23.0 °F 86% 30.30 in 10.0 mi WSW 4.6 mph - N/A   Clear
4:35 AM 26.6 °F 22.6 °F 23.0 °F 86% 30.29 in 10.0 mi SW 3.5 mph - N/A   Clear
4:55 AM 26.6 °F 20.0 °F 23.0 °F 86% 30.30 in 10.0 mi SW 5.8 mph - N/A   Clear
5:15 AM 26.6 °F 21.2 °F 23.0 °F 86% 30.29 in 10.0 mi SW 4.6 mph - N/A   Clear
5:35 AM 26.6 °F 20.0 °F 23.0 °F 86% 30.28 in 10.0 mi SW 5.8 mph - N/A   Clear
5:55 AM 26.6 °F 21.2 °F 23.0 °F 86% 30.28 in 10.0 mi SSW 4.6 mph - N/A   Clear
6:15 AM 26.6 °F 22.6 °F 23.0 °F 86% 30.26 in 10.0 mi WSW 3.5 mph - N/A   Clear
6:35 AM 26.6 °F - 23.0 °F 86% 30.27 in 10.0 mi Calm Calm - N/A   Clear
6:55 AM 26.6 °F - 23.0 °F 86% 30.26 in 10.0 mi Calm Calm - N/A   Clear
7:15 AM 26.6 °F - 23.0 °F 86% 30.27 in 10.0 mi Calm Calm - N/A   Clear
7:35 AM 26.6 °F 22.6 °F 23.0 °F 86% 30.27 in 10.0 mi SSW 3.5 mph - N/A   Clear
7:55 AM 26.6 °F - 23.0 °F 86% 30.27 in 10.0 mi Calm Calm - N/A   Clear
8:15 AM 26.6 °F - 23.0 °F 86% 30.27 in 10.0 mi Calm Calm - N/A   Clear
8:35 AM 28.4 °F - 24.8 °F 86% 30.26 in 10.0 mi Calm Calm - N/A   Clear
8:55 AM 28.4 °F - 26.6 °F 93% 30.26 in 10.0 mi Calm Calm - N/A   Clear
9:15 AM 30.2 °F - 26.6 °F 86% 30.25 in 10.0 mi Calm Calm - N/A   Clear
9:35 AM 30.2 °F - 24.8 °F 80% 30.25 in 10.0 mi North - - N/A   Clear
9:55 AM 32.0 °F - 26.6 °F 80% 30.26 in 10.0 mi Calm Calm - N/A   Clear
10:15 AM 32.0 °F - 26.6 °F 80% 30.25 in 10.0 mi Calm Calm - N/A   Clear
10:35 AM 32.0 °F - 26.6 °F 80% 30.24 in 10.0 mi Calm Calm - N/A   Clear
10:55 AM 32.0 °F - 26.6 °F 80% 30.23 in 10.0 mi Calm Calm - N/A   Clear
11:15 AM 32.0 °F - 26.6 °F 80% 30.23 in 10.0 mi Calm Calm - N/A   Clear
11:35 AM 33.8 °F - 26.6 °F 75% 30.21 in 10.0 mi Calm Calm - N/A   Clear
11:55 AM 33.8 °F - 24.8 °F 70% 30.20 in 10.0 mi Calm Calm - N/A   Clear
12:15 PM 33.8 °F - 26.6 °F 75% 30.18 in 10.0 mi Calm Calm - N/A   Clear
12:35 PM 33.8 °F - 26.6 °F 75% 30.18 in 10.0 mi North - - N/A   Clear
12:55 PM 33.8 °F - 26.6 °F 75% 30.16 in 10.0 mi Calm Calm - N/A   Clear
1:15 PM 33.8 °F - 28.4 °F 81% 30.14 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:35 PM 33.8 °F - 26.6 °F 75% 30.13 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:55 PM 35.6 °F - 26.6 °F 70% 30.13 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:15 PM 35.6 °F - 26.6 °F 70% 30.11 in 10.0 mi Calm Calm - N/A   Scattered Clouds
2:35 PM 35.6 °F 31.7 °F 26.6 °F 70% 30.11 in 10.0 mi SSW 4.6 mph - N/A   Scattered Clouds
2:55 PM 35.6 °F - 26.6 °F 70% 30.11 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:15 PM 35.6 °F 32.8 °F 28.4 °F 75% 30.10 in 10.0 mi South 3.5 mph - N/A   Overcast
3:35 PM 35.6 °F 31.7 °F 28.4 °F 75% 30.11 in 10.0 mi SSW 4.6 mph - N/A   Overcast
3:55 PM 35.6 °F 32.8 °F 28.4 °F 75% 30.11 in 10.0 mi SSW 3.5 mph - N/A   Overcast
4:15 PM 35.6 °F 32.8 °F 28.4 °F 75% 30.09 in 10.0 mi South 3.5 mph - N/A   Overcast
4:35 PM 35.6 °F 31.7 °F 28.4 °F 75% 30.08 in 10.0 mi South 4.6 mph - N/A   Overcast
4:55 PM 35.6 °F 29.9 °F 28.4 °F 75% 30.10 in 10.0 mi SSW 6.9 mph - N/A   Overcast
5:15 PM 35.6 °F 30.7 °F 28.4 °F 75% 30.09 in 10.0 mi SSW 5.8 mph - N/A   Overcast
5:35 PM 35.6 °F - 28.4 °F 75% 30.08 in 10.0 mi Calm Calm - N/A   Overcast
5:55 PM 35.6 °F - 28.4 °F 75% 30.07 in 10.0 mi Calm Calm - N/A   Overcast
6:15 PM 35.6 °F 32.8 °F 30.2 °F 81% 30.08 in 10.0 mi WSW 3.5 mph - N/A   Overcast
6:35 PM 35.6 °F 32.8 °F 30.2 °F 81% 30.07 in 10.0 mi SW 3.5 mph - N/A   Overcast
6:55 PM 35.6 °F 32.8 °F 28.4 °F 75% 30.07 in 10.0 mi SW 3.5 mph - N/A   Overcast
7:15 PM 35.6 °F 32.8 °F 30.2 °F 81% 30.06 in 10.0 mi West 3.5 mph - N/A   Overcast
7:35 PM 33.8 °F 29.6 °F 30.2 °F 87% 30.05 in 10.0 mi SSW 4.6 mph - N/A   Mostly Cloudy
7:55 PM 33.8 °F - 28.4 °F 81% 30.05 in 10.0 mi North - - N/A   Scattered Clouds
8:15 PM 33.8 °F 29.6 °F 28.4 °F 81% 30.04 in 10.0 mi SSW 4.6 mph - N/A   Clear
8:35 PM 35.6 °F 31.7 °F 28.4 °F 75% 30.03 in 10.0 mi SW 4.6 mph - N/A   Clear
8:55 PM 35.6 °F 30.7 °F 28.4 °F 75% 30.03 in 10.0 mi WSW 5.8 mph - N/A   Mostly Cloudy
9:15 PM 35.6 °F 31.7 °F 28.4 °F 75% 30.04 in 10.0 mi West 4.6 mph - N/A   Overcast
9:35 PM 35.6 °F 31.7 °F 28.4 °F 75% 30.02 in 10.0 mi WSW 4.6 mph - N/A   Overcast
10:15 PM 37.4 °F 33.8 °F 26.6 °F 65% 30.01 in 10.0 mi West 4.6 mph - N/A   Overcast
10:35 PM 37.4 °F 34.9 °F 26.6 °F 65% 30.01 in 10.0 mi WSW 3.5 mph - N/A   Mostly Cloudy
11:15 PM 37.4 °F 33.8 °F 26.6 °F 65% 30.01 in 10.0 mi WSW 4.6 mph - N/A   Scattered Clouds
11:35 PM 35.6 °F 30.7 °F 26.6 °F 70% 30.01 in 10.0 mi West 5.8 mph - N/A   Scattered Clouds
11:55 PM 33.8 °F 30.8 °F 28.4 °F 81% 30.00 in 10.0 mi West 3.5 mph - N/A   Clear