In August, Reston typically sees daytime highs of 29.9°C and overnight lows around 17.6°C. Compared to the annual average high of 18.8°C, August runs +11.1°C.
August in Reston averages a daytime high of 29.9°C and an overnight low of 17.6°C.
August runs +11.1°C compared to Reston's annual average high of 18.8°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 29.9°C and cooler evenings around 17.6°C.