Reston Climate by Month
Reston, Virginia, United States
Hot summers and cold winters, with rain spread through the year.
Reston has hot summers and cold winters, with rain spread through the year. Afternoon highs range from 44°F (7°C) in January to 89°F (31°C) in July, and January nights average 26°F (-3°C). It gets 42 in (1067 mm) of rain a year, spread across the months.
- Warmest month
- 89°F(31°C)
- Average high, July
- Coldest nights
- 26°F(-3°C)
- Average low, January
- Rain per year
- 42 in(1067 mm)
- No clear rainy season
- Humidity
- 63%
- Sunniest: June
Best and worst months in Reston
Best for weatherThe most comfortable weather comes in May, with highs around 77°F (25°C) and about 3.9 in (100 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 44°F (7°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Reston weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 44°F(7°C) | 26°F(-3°C) | 2.7 in(68 mm) | 58% | 2.0 |
| FebFebruary | 47°F(8°C) | 27°F(-3°C) | 2.5 in(64 mm) | 53% | 2.9 |
| MarMarch | 56°F(14°C) | 34°F(1°C) | 3.5 in(89 mm) | 58% | 3.8 |
| AprApril | 68°F(20°C) | 44°F(7°C) | 3.3 in(84 mm) | 59% | 4.8 |
| MayMayBest | 77°F(25°C) | 54°F(12°C) | 3.9 in(100 mm) | 61% | 5.4 |
| JunJune | 85°F(29°C) | 63°F(17°C) | 4.1 in(105 mm) | 67% | 5.7 |
| JulJuly | 89°F(31°C) | 67°F(19°C) | 3.9 in(100 mm) | 65% | 5.7 |
| AugAugust | 87°F(30°C) | 65°F(19°C) | 4.0 in(102 mm) | 69% | 5.2 |
| SepSeptember | 80°F(27°C) | 58°F(15°C) | 4.3 in(108 mm) | 70% | 4.2 |
| OctOctober | 69°F(21°C) | 47°F(8°C) | 3.3 in(85 mm) | 67% | 3.1 |
| NovNovember | 58°F(14°C) | 37°F(3°C) | 3.0 in(76 mm) | 63% | 2.2 |
| DecDecember | 48°F(9°C) | 29°F(-1°C) | 3.4 in(86 mm) | 63% | 1.8 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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