Capitol Hill Weather Forecast

    • 62
    • 76

    Rain Showers

    • 56
    • 66

    Rain Showers

    • 56
    • 66

    Chance Rain Showers

    • 53
    • 68

    Slight Chance Rain Showers

    • 54
    • 66

    Slight Chance Rain Showers

    • 55
    • 67

    Mostly Cloudy

Today 21 Sep District of Columbia

Mostly cloudy. Scattered Showers this afternoon. Highs in the mid 70s. Northeast Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 21 Sep District of Columbia

Showers likely in the Evening, then Showers with a slight chance of Thunderstorms after midnight. Lows in the lower 60s. Northeast Winds 5 to 10 Mph. Chance of rain 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Capitol Hill Temperature Statistics

September Temperature

Washington/Reagan National Airport, DC (3.1 miles)

  • Lowest 15 September, 2026

    58.6 °F

  • Average September

    78.4 °F

  • Highest 1 September, 2026

    98.7 °F

Climate (2021–2026)

Washington/Reagan National Airport, DC (3.1 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    69.3 °F
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