Cornish Flat Weather Forecast

    • 40
    • 64

    Partly Sunny

    • 40
    • 65

    Mostly Sunny

    • 44
    • 66

    Partly Sunny

    • 47
    • 64

    Chance Rain Showers

    • 47
    • 62

    Chance Rain Showers

    • 48
    • 65

    Slight Chance Rain Showers

Today 22 Sep Sullivan

Partly sunny. Highs in the lower 60s. Light and variable Winds.

Tonight 22 Sep Sullivan

Partly cloudy. Patchy fog. Lows around 40. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cornish Flat Temperature Statistics

September Temperature

Lebanon Municipal Airport (8.7 miles)

  • Lowest 20 September, 2026

    39 °F

  • Average September

    61.3 °F

  • Highest 10 September, 2026

    82 °F

Climate (2021–2026)

Lebanon Municipal Airport (8.7 miles)

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  • Average Low 2021–2026

    37.8 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    59.6 °F
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