McLean Weather Forecast

    • 53
    • 74

    Decreasing Clouds

    • 50
    • 70

    Partly Sunny

    • 47
    • 69

    Mostly Sunny

    • 50
    • 71

    Partly Sunny

    • 52
    • 71

    Mostly Cloudy

    • 59
    • 73

    Rain Showers Likely

Today 4 Sep Tompkins

Partly sunny. Highs in the mid 70s. Northwest Winds 5 to 10 Mph.

Tonight 4 Sep Tompkins

Partly cloudy. Patchy fog after midnight. Lows in the mid 50s. Northwest Winds around 5 Mph.

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  • Temperature Real-Time

McLean Temperature Statistics

September Temperature

Cortland County-Chase Field (4.3 miles)

  • Lowest 1 September, 2026

    62.6 °F

  • Average September

    68.8 °F

  • Highest 1 September, 2026

    78.8 °F

Climate (2021–2026)

Cortland County-Chase Field (4.3 miles)

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  • Average Low 2021–2026

    37.7 °F

  • Average 2021–2026

    47.2 °F

  • Average High 2021–2026

    56.5 °F
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