Montoursville Weather Forecast

    • 44
    • 72

    Becoming Sunny

    • 46
    • 74

    Mostly Sunny

    • 48
    • 76

    Mostly Sunny

    • 51
    • 78

    Mostly Sunny

    • 52
    • 82

    Mostly Sunny

    • 50
    • 77

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

Today 7 Sep Southern Lycoming

Mostly sunny. Near steady temperature in the upper 60s. Northwest Winds 5 to 10 Mph.

Tonight 7 Sep Southern Lycoming

Mostly clear. Lows in the mid 40s. Northwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Montoursville Temperature Statistics

September Temperature

Williamsport - Lycoming County Airport (0.6 miles)

  • Lowest 2 September, 2025

    50 °F

  • Average September

    66.3 °F

  • Highest 5 September, 2025

    82 °F

Climate (2020–Present)

Williamsport - Lycoming County Airport (0.6 miles)

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  • Average Low 2020–2025

    43.9 °F

  • Average 2020–2025

    53.1 °F

  • Average High 2020–2025

    63.3 °F
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