Currently: 69 °F. Overcast. (Weather station: Washington-Dulles International Airport, USA). See more current weatherAnnual Weather Averages Near Reston
Averages are for Washington-Dulles International Airport, which is 5 miles from Reston.
Based on weather reports collected during 1985–2015.
All Year Climate & Weather Averages in Reston
High Temp: 88 °F
Low Temp: 25 °F
Mean Temp: 55 °F
Precipitation: 1.70"
Humidity: 67%
Dew Point: 44 °F
Wind: 6 mph
Pressure: 30.06 "Hg
Visibility: 10 mi
January Climate & Weather Averages in Reston
High Temp: 43 °F
Low Temp: 25 °F
Mean Temp: 34 °F
Precipitation: 1.38"
Humidity: 65%
Dew Point: 22 °F
Wind: 6 mph
Pressure: 30.12 "Hg
Visibility: 10 mi
February Climate & Weather Averages in Reston
High Temp: 45 °F
Low Temp: 26 °F
Mean Temp: 36 °F
Precipitation: 1.21"
Humidity: 62%
Dew Point: 23 °F
Wind: 7 mph
Pressure: 30.10 "Hg
Visibility: 10 mi
March Climate & Weather Averages in Reston
High Temp: 55 °F
Low Temp: 33 °F
Mean Temp: 44 °F
Precipitation: 1.76"
Humidity: 61%
Dew Point: 30 °F
Wind: 7 mph
Pressure: 30.08 "Hg
Visibility: 10 mi
April Climate & Weather Averages in Reston
High Temp: 66 °F
Low Temp: 42 °F
Mean Temp: 54 °F
Precipitation: 1.71"
Humidity: 60%
Dew Point: 40 °F
Wind: 7 mph
Pressure: 30.00 "Hg
Visibility: 11 mi
May Climate & Weather Averages in Reston
High Temp: 75 °F
Low Temp: 52 °F
Mean Temp: 64 °F
Precipitation: 2.63"
Humidity: 68%
Dew Point: 52 °F
Wind: 6 mph
Pressure: 30.01 "Hg
Visibility: 9 mi
June Climate & Weather Averages in Reston
High Temp: 84 °F
Low Temp: 62 °F
Mean Temp: 73 °F
Precipitation: 2.00"
Humidity: 69%
Dew Point: 62 °F
Wind: 5 mph
Pressure: 29.98 "Hg
Visibility: 9 mi
July Climate & Weather Averages in Reston
High Temp: 88 °F
Low Temp: 67 °F
Mean Temp: 77 °F
Precipitation: 1.89"
Humidity: 69%
Dew Point: 66 °F
Wind: 5 mph
Pressure: 29.99 "Hg
Visibility: 8 mi
August Climate & Weather Averages in Reston
High Temp: 86 °F
Low Temp: 65 °F
Mean Temp: 76 °F
Precipitation: 1.49"
Humidity: 70%
Dew Point: 64 °F
Wind: 4 mph
Pressure: 30.02 "Hg
Visibility: 9 mi
September Climate & Weather Averages in Reston
High Temp: 79 °F
Low Temp: 57 °F
Mean Temp: 68 °F
Precipitation: 1.73"
Humidity: 71%
Dew Point: 58 °F
Wind: 5 mph
Pressure: 30.07 "Hg
Visibility: 9 mi
October Climate & Weather Averages in Reston
High Temp: 68 °F
Low Temp: 44 °F
Mean Temp: 56 °F
Precipitation: 1.37"
Humidity: 70%
Dew Point: 46 °F
Wind: 5 mph
Pressure: 30.09 "Hg
Visibility: 10 mi
November Climate & Weather Averages in Reston
High Temp: 57 °F
Low Temp: 35 °F
Mean Temp: 46 °F
Precipitation: 1.55"
Humidity: 67%
Dew Point: 35 °F
Wind: 6 mph
Pressure: 30.14 "Hg
Visibility: 10 mi
December Climate & Weather Averages in Reston
High Temp: 46 °F
Low Temp: 28 °F
Mean Temp: 37 °F
Precipitation: 1.71"
Humidity: 68%
Dew Point: 27 °F
Wind: 6 mph
Pressure: 30.14 "Hg
Visibility: 10 mi