Lebanon Weather Forecast

    • 33
    • 42

    Rain Likely

    • 21
    • 54

    Rain

    • 26
    • 34

    Slight Chance Snow

    • 15
    • 39

    Mostly Cloudy

    • 12
    • 23

    Partly Sunny

    • 21
    • 31

    Chance Snow

    • 13
    • 31

    Mostly Cloudy

Today 18 Dec Southern Grafton

Partly sunny. Highs in the upper 30s. Southeast Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 18 Dec Southern Grafton

Partly cloudy in the Evening, then cloudy with rain likely after midnight. Areas of fog. Lows in the upper 20s. Temperatures rising into the upper 30s after midnight. Southeast Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

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Lebanon Temperature Statistics

December Temperature

Lebanon Municipal Airport (2.5 miles)

  • Lowest 9 December, 2025

    -8 °F

  • Average December

    22.3 °F

  • Highest 11 December, 2025

    39 °F

Climate (2020–Present)

Lebanon Municipal Airport (2.5 miles)

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  • Average Low 2020–2025

    38.1 °F

  • Average 2020–2025

    48.8 °F

  • Average High 2020–2025

    59.8 °F
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