Herndon Weather in August

August in Herndon typically sees daytime highs of 30°C (86°F) and nighttime lows of 19°C (66°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Herndon in August

Historically, August sees about 11 days of rain, with a monthly average of 73 mm (2.9 in). Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Herndon in August

August in Herndon brings typical temperatures with highs around 30°C (86°F) and lows of 19°C (66°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 19°C (66°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Herndon in August

Expect a lot of sunshine this month, with about 262 hours of sun. These sunny conditions add to the overall experience.

For Herndon itself, April, May, June, September and October generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.