Washington National Airport

The tables below display average monthly climate and weather indicators in Washington National Airport District of Columbia.

Temperature by: Fahrenheit / Centigrade

Washington National Airport Temperature Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Avg. Temperature34.637.547.256.566.475.680.078.571.359.749.839.458.0
Avg. Max Temperature42.345.956.566.776.284.788.586.980.169.158.347.066.9
Avg. Min Temperature26.829.137.746.456.666.571.470.062.550.341.131.749.2
Days with Max Temp of 90 F or Higher0.00.00.0< 0.52.08.014.010.04.0< 0.50.00.037.0
Days with Min Temp Below Freezing22.018.08.01.00.00.00.00.00.0< 0.55.015.069.0
 
Washington National Airport Heating and Cooling Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Heating Degree Days94277055226460.00.00.00.014.01954567944047
Cooling Degree Days0.00.00.09.010431846541920331.00.00.01549
 
Washington National Airport Precipitation Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Precipitation (inches)2.72.73.22.73.73.43.83.93.33.03.13.138.6
Days with Precipitation 0.01 inch or More10.09.011.010.011.010.010.09.08.07.09.09.0113
Monthly Snowfall (inches)5.55.42.2< 0.05< 0.05< 0.05< 0.05< 0.050.00.00.82.816.7
 
Other Washington National Airport Weather Indicators Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Average Wind Speed10.010.310.910.59.38.98.38.18.38.79.49.69.4
Clear Days7.07.07.07.07.07.07.09.010.011.08.08.096.0
Partly Cloudy Days7.07.08.09.010.011.012.010.08.08.08.07.0106
Cloudy Days16.015.015.014.014.011.012.012.012.012.014.016.0164
Percent of Possible Sunshine46.050.055.057.058.064.062.062.061.059.051.046.056.0
Avg. Relative Humidity54.063.062.060.061.564.564.566.568.067.564.063.066.0

Weather information for other cities in District of Columbia

Portions of this site are based on the CIA World Fact Book, a public-domain work
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