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Loudoun County Weather

 
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The average temperature of Loudoun County is 53.38°F, which is lower than the Virginia average temperature of 55.54°F and is lower than the national average temperature of 54.45°F.

Topics:Heating Cost IndexCooling Cost IndexHistorical TemperatureHistorical PrecipitationHistorical SnowHistorical HumidityHistorical Wind Speed

Historical Weather

Heating Cost Index, #97

Loudoun County
231.94
Virginia
200.82
U.S.
212.91

Cooling Cost Index, #48

Loudoun County
103.56
Virginia
126.27
U.S.
139.42

The Heating Cost Index and the Cooling Cost Index are indicators of the relative heating and cooling cost of an area. They were calculated based on the average temperate and duration of the hot and cold days for the area. Please note, the actual heating cost and cooling cost are also dependent on other factors specific to individual residences such as the size of the house, the insulation condition, and the equipment efficiency, etc.

Average Temperature

Annual Average Temperature, #98
Loudoun County
53.4 °F
Virginia
55.5 °F
U.S.
54.5 °F

Ranks: Average Max. Temperature: #107, Average Min. Temperature: #91

Precipitation

Average Annual Precipitation, #114
Loudoun County
39.45 inches
Virginia
42.76 inches
U.S.
38.67 inches


Average Number of Days with 0.1 Inch or More Precipitation in a Year (this gives an indication of the number of days in a year that it is useful to have an umbrella), #113
Loudoun County
71.57 days
Virginia
74.79 days
U.S.
66.51 days


Snow

Average Annual Snowfall, #27
Loudoun County
21.03 inches
Virginia
14.85 inches
U.S.
23.27 inches


Average Number of Days with 1 Inch or More Snow Depth in a Year, #13
Loudoun County
19.92 days
Virginia
11.43 days
U.S.
27.17 days


Humidity

Annual Average Humidity, #86
Loudoun County
75.75%
Virginia
76.77%
U.S.
77.52%


Wind Speed

Annual Average Wind Speed, #6
Loudoun County
25.94 mph
Virginia
19.32 mph
U.S.
16.93 mph


* The temperature, snow fall, and precipitation information on this page were calculated from the historical data of 18,000+ U.S weather stations for the period of time from 1980 to 2010. The humidity and wind speed information were calculated from data from 15,000 worldwide stations for the period of time from 1980 to 2010.


 
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