McLean Weather Forecast

    • 62
    • 91

    Mostly Sunny

    • 63
    • 88

    Chance Thunderstorms

    • 63
    • 85

    Slight Chance Thunderstorms

    • 63
    • 80

    Chance Thunderstorms

    • 62
    • 80

    Chance Rain Showers

    • 57
    • 78

    Slight Chance Thunderstorms

Today 18 Sep McLean

Sunny. Highs around 90. Southeast Winds around 5 Mph.

Tonight 18 Sep McLean

Mostly clear. Lows in the lower 60s. Southeast Winds around 5 Mph.

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McLean Temperature Statistics

September Temperature

Logan County Airport (13.7 miles)

  • Lowest 8 September, 2025

    42.4 °F

  • Average September

    67.8 °F

  • Highest 14 September, 2025

    96.6 °F

Climate (2020–Present)

Logan County Airport (13.7 miles)

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  • Average Low 2020–2025

    45.6 °F

  • Average 2020–2025

    55.6 °F

  • Average High 2020–2025

    65.5 °F
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