Cornish Flat Weather Forecast

    • 56
    • 80

    Becoming Sunny

    • 35
    • 70

    Mostly Sunny

    • 35
    • 66

    Mostly Sunny

    • 48
    • 71

    Partly Sunny

    • 56
    • 77

    Partly Sunny

    • 58
    • 81

    Partly Sunny

Today 18 Sep Sullivan

Partly sunny. Isolated Showers in the morning. Highs in the upper 70s. Light and variable Winds. Chance of rain 20 percent.

Tonight 18 Sep Sullivan

Mostly cloudy with isolated Showers. Patchy fog. Near steady temperature in the lower 50s. Light and variable Winds. Chance of rain 20 percent.

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Cornish Flat Temperature Statistics

September Temperature

Lebanon Municipal Airport (8.7 miles)

  • Lowest 9 September, 2025

    41 °F

  • Average September

    61.6 °F

  • Highest 3 September, 2025

    82.9 °F

Climate (2020–Present)

Lebanon Municipal Airport (8.7 miles)

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  • Average Low 2020–2025

    38.2 °F

  • Average 2020–2025

    48.9 °F

  • Average High 2020–2025

    59.9 °F
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