McMillan Weather Forecast

    • 56
    • 73

    Slight Chance Rain Showers

    • 57
    • 68

    Rain Showers Likely

    • 60
    • 64

    Rain Showers Likely

    • 60
    • 68

    Mostly Cloudy

    • 60
    • 74

    Partly Sunny

    • 62
    • 77

    Partly Sunny

    • 63
    • 79

    Partly Sunny

Today 25 Sep District of Columbia

Partly sunny. Highs in the upper 70s.

Tonight 25 Sep District of Columbia

Partly cloudy late this Evening, then mostly clear with a slight chance of Showers. Lows in the mid 50s. North Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

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McMillan Temperature Statistics

September Temperature

Washington/Reagan National Airport, DC (5 miles)

  • Lowest 23 September, 2026

    55.9 °F

  • Average September

    76.6 °F

  • Highest 1 September, 2026

    98.7 °F

Climate (2021–2026)

Washington/Reagan National Airport, DC (5 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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