Mifflinburg Weather Forecast

    • 16
    • 39

    Mostly Sunny

    • 28
    • 39

    Snow Likely

    • 32
    • 43

    Chance Rain/Snow

    • 30
    • 43

    Chance Rain Showers

    • 37
    • 42

    Chance Rain Showers

    • 34
    • 54

    Slight Chance Rain Showers

Today 21 Dec Union

Mostly cloudy this Morning, then becoming mostly sunny. Highs in the mid 30s. West Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 21 Dec Union

Mostly clear. Lows around 20. Northwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

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  • Temperature Real-Time

Mifflinburg Temperature Statistics

December Temperature

Selinsgrove Penn Valley Airport (11.2 miles)

  • Lowest 9 December, 2025

    5 °F

  • Average December

    28 °F

  • Highest 19 December, 2025

    57 °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

    63.1 °F
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