Reston (VA) monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Reston

Reston average temperature chart (Celsius) Reston average temperature chart (Fahrenheit)
Average monthly temperatures in Reston (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.7 6.6 12.5 18.3 23.4 28 30.5 29.5 25.9 19.8 13.7 7.3
°F 40.5 43.9 54.5 64.9 74.1 82.5 86.8 85.1 78.7 67.6 56.7 45.1

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Reston monthly rainfall chart (mm) Reston monthly rainfall chart (inches)
Average monthly rainfall in Reston (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 69 69 86 79 98 87 91 99 89 80 86 84
inches 2.7 2.7 3.4 3.1 3.9 3.4 3.6 3.9 3.5 3.1 3.4 3.3
Rainy days 10 9 10 10 12 10 10 10 8 8 9 10

Average annual rainfall in Reston: 978.7mm (385.3 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Reston

Reston average daily sunshine chart
Average daily sunshine Reston
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.1 5.9 7.1 8.1 8.9 10 9.7 9.1 7.9 7 5.4 4.7

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Reston average minimum / maximum temperatures (Celsius) Reston average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Reston (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -5.6 -4.3 0.4 5.2 10.7 15.7 18.5 17.6 13.6 6.5 1.8 -3
Max °C 5 6.9 12.8 18.6 23.7 28.4 30.8 29.8 26.3 20.1 14 7.6
Min °F 22 24.3 32.7 41.4 51.3 60.2 65.2 63.7 56.4 43.7 35.2 26.7
Max °F 31.5 34.3 43.9 53.4 63 71.6 76.3 74.7 67.8 55.9 46.2 36.1

Sea temperature

The graph below shows the average sea temperature.

Reston average sea temperature chart (Celsius) Reston average sea temperature chart (Fahrenheit)
Average sea temperature around Reston in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.2 2.6 3.3 6.7 11.8 18.2 23.2 24.2 22.1 17.3 12.2 7.7
°F 39.6 36.6 38 44.1 53.3 64.8 73.7 75.6 71.7 63.2 54 45.8

Wind speed

The graph below shows the average wind speed.

Reston average winspeed by month (km/h) Reston average winspeed by month (mph)
Average wind speed in Reston (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 15 16 16 16 14 13 12 11 12 13 14 14
mph 9 10 10 10 9 8 7 7 7 8 9 9

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Reston relative humidity averages
Average relative humidity in Reston
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
67% 65% 63% 62% 69% 71% 72% 74% 74% 72% 69% 69%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Reston weather stats

Reston weather statistics
Hottest month: July 30.5°C 86.9°F
Driest month: January 69mm 2.7ins
Sunniest month: June 10hrs
Coldest month: January 4.7°C 40.5°F
Wettest month: August 99mm 3.9ins
Warmest sea: August 24.2°C 75.6°F
Map showing location of Reston (38.96872, -77.3411) Reston map pin © Google

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