McLean Weather Forecast

    • 59
    • 79

    Thunderstorms

    • 50
    • 70

    Chance Rain Showers

    • 51
    • 73

    Mostly Sunny

    • 56
    • 78

    Mostly Sunny

    • 59
    • 82

    Partly Sunny

    • 60
    • 83

    Rain Showers Likely

Today 21 Jul Tompkins

Partly sunny with a slight chance of Showers and Thunderstorms this Morning, then mostly cloudy with Showers and Thunderstorms this afternoon. Some Thunderstorms may produce gusty Winds and heavy rainfall this afternoon. Highs in the lower 80s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 90 percent.

Tonight 21 Jul Tompkins

Mostly cloudy in the Evening, then becoming partly cloudy. A chance of Showers. A chance of Thunderstorms, mainly in the evening. Some Thunderstorms may produce gusty Winds and heavy rainfall in the evening. Lows around 60. Southwest Winds 5 to 10 Mph. Gusts up to 25 Mph in the evening. Chance of rain 50 percent.

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McLean Temperature Statistics

July Temperature

Cortland County-Chase Field (4.3 miles)

  • Lowest 12 July, 2026

    51.8 °F

  • Average July

    71.2 °F

  • Highest 1 July, 2026

    91.4 °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

    47.3 °F

  • Average High 2021–2026

    56.5 °F
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