Mifflinburg Weather Forecast

    • 56
    • 81

    Increasing Clouds

    • 57
    • 80

    Partly Sunny

    • 58
    • 75

    Chance Rain Showers

    • 57
    • 82

    Mostly Sunny

    • 53
    • 83

    Mostly Sunny

    • 51
    • 75

    Partly Sunny

Today 15 Sep Union

Sunny. Highs in the lower 80s. Northeast Winds around 5 Mph.

Tonight 15 Sep Union

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the mid 50s. East Winds around 5 Mph.

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Mifflinburg Temperature Statistics

September Temperature

Selinsgrove Penn Valley Airport (11.2 miles)

  • Lowest 8 September, 2025

    39.9 °F

  • Average September

    62.4 °F

  • Highest 5 September, 2025

    82 °F

Climate (2020–Present)

Selinsgrove Penn Valley Airport (11.2 miles)

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  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    52.6 °F

  • Average High 2020–2025

    63.2 °F
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