McLean Weather Forecast

    • 12
    • 52

    Rain

    • 23
    • 29

    Increasing Clouds

    • 20
    • 45

    Partly Sunny

    • 23
    • 33

    Partly Sunny

    • 34
    • 41

    Mostly Cloudy

    • 38
    • 52

    Mostly Cloudy

    • 48
    • 57

    Mostly Cloudy

Today 18 Dec McLean

Cloudy with a 50 percent chance of Showers. Not as cool with Highs in the lower 50s. Temperature falling into the upper 30s late. West Winds 15 to 20 Mph with Gusts up to 45 Mph.

Tonight 18 Dec McLean

Mostly cloudy. Scattered snow Showers this evening. Little or no snow accumulation. Blustery and much cooler with Lows around 11. West Winds 15 to 25 Mph with Gusts up to 40 Mph. Chance of snow 50 percent. Wind chill Values as low as 9 below after midnight.

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McLean Temperature Statistics

December Temperature

Logan County Airport (13.7 miles)

  • Lowest 14 December, 2025

    -8 °F

  • Average December

    22.7 °F

  • Highest 10 December, 2025

    43.7 °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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