McLean Weather Forecast

    • 69
    • 82

    Chance Rain Showers

    • 68
    • 88

    Chance Rain Showers

    • 59
    • 80

    Rain Showers Likely

    • 54
    • 68

    Rain Showers Likely

    • 51
    • 66

    Mostly Cloudy

    • 53
    • 69

    Partly Sunny

    • 54
    • 70

    Partly Sunny

Today 18 Sep McLean

Showers likely with a slight chance of Thunderstorms. Cooler. Near steady temperature in the mid 70s. East Winds around 10 Mph. Chance of rain 70 percent.

Tonight 18 Sep McLean

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the upper 60s. Southeast Winds around 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

McLean Temperature Statistics

September Temperature

Logan County Airport (13.7 miles)

  • Lowest 14 September, 2026

    55.4 °F

  • Average September

    77.2 °F

  • Highest 15 September, 2026

    98.2 °F

Climate (2021–2026)

Logan County Airport (13.7 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    55.4 °F

  • Average High 2021–2026

    65.5 °F
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