Mifflinburg Weather Forecast

    • 57
    • 79

    Becoming Sunny

    • 54
    • 76

    Partly Sunny

    • 54
    • 76

    Mostly Sunny

    • 60
    • 80

    Mostly Cloudy

    • 69
    • 85

    Chance Rain Showers

    • 57
    • 79

    Partly Sunny

Today 5 Sep Union

Mostly sunny. Highs in the upper 70s. North Winds around 5 Mph.

Tonight 5 Sep Union

Mostly clear. Lows in the mid 50s. North Winds around 5 Mph.

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  • Temperature Real-Time

Mifflinburg Temperature Statistics

September Temperature

Selinsgrove Penn Valley Airport (11.2 miles)

  • Lowest 2 September, 2026

    66.9 °F

  • Average September

    74.7 °F

  • Highest 1 September, 2026

    90 °F

Climate (2021–2026)

Selinsgrove Penn Valley Airport (11.2 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    63.1 °F
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