In August, Bethesda typically sees daytime highs of 30.1°C and overnight lows around 17.8°C. Compared to the annual average high of 19.0°C, August runs +11.0°C.
August in Bethesda averages a daytime high of 30.1°C and an overnight low of 17.8°C.
August runs +11.0°C compared to Bethesda's annual average high of 19.0°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 30.1°C and cooler evenings around 17.8°C.