Reston (VA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Reston.
Climate overview of Reston
The climate in Reston, Virginia, United States of America, is marked by large temperature swings across the seasons, ranging from 31°C (88°F) in July to 6°C (43°F) in January.
With around 1118 mm (44 in) of annual rain/snowfall, Reston has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has very warm summers and cold winters. The wettest month is October. The most sunshine falls in June, with an average of 9.4 hours of daily sunshine.
Reston Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Reston - and find the best time to visit.
Monthly Temperature in Reston
In Reston, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a very warm 31°C (88°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 6°C (43°F).
At night, temperatures range from around 20°C (68°F) in July to -4°C (25°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Reston
Reston experiences significant rain/snowfall throughout the year, averaging 1118 mm (44 in) of precipitation annually. Reston experiences moderate seasonal variation in rainfall, with monthly averages ranging from 133 mm (5.2 in) in October, the wettest month, and 63 mm (2.5 in) in February, the driest month. For more details, please visit our Reston Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Reston
Reston can be enjoyed more throughout the sunniest month of June under a blue sky, with approximately 9.4 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 4.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Reston by Month
The relative humidity is high throughout the year in Reston.
The city experiences its highest humidity in August, reaching 69%. In March, the humidity drops to its lowest level at 58%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Reston
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May, June and September
- Warmest weather: July and August
- Most sunshine: June and July
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -4°C (25°F).
Frequently asked questions about the climate in Reston
What is the best time to visit Reston?
April, May, June and September typically offer the most optimal weather in Reston. In contrast, January, February and December tend to have less optimal conditions. Reston has very warm summers and cold winters.
What temperatures can I expect in Reston?
Daytime highs range from 6°C (43°F) in January to 31°C (88°F) in July. Nighttime lows range from -4°C (25°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Reston get?
Annual rainfall is around 1118 mm (44 in). October is the wettest month with 133 mm (5.2 in), while February is the driest with 63 mm (2.5 in).
How sunny is Reston?
Reston receives around 2,520 hours of sunshine per year. June is the sunniest month with 282 hours, while December is the cloudiest with just 130 hours. Overall, Reston enjoys abundant sunshine.
Reston 3-Day Forecast
Reston on the map
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Popular this month
Where to go in August - average daytime high across popular destinations.
Kissimmee
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29°C (84°F) Big Bear Lake
27°C (81°F) Los Angeles
24°C (75°F) San Francisco22°C (72°F) 
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