Mifflinburg Weather Forecast

    • 66
    • 77

    Rain Showers

    • 58
    • 83

    Chance Rain Showers

    • 48
    • 71

    Mostly Sunny

    • 54
    • 72

    Mostly Sunny

    • 61
    • 79

    Partly Sunny

    • 62
    • 82

    Chance Rain Showers

    • 57
    • 77

    Chance Rain Showers

Today 12 Sep Union

Mostly cloudy. Near steady temperature in the mid 70s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 12 Sep Union

Showers with a chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall. Not as cool with Lows in the mid 60s. Southeast Winds around 5 Mph. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mifflinburg Temperature Statistics

September Temperature

Selinsgrove Penn Valley Airport (11.2 miles)

  • Lowest 8 September, 2026

    50 °F

  • Average September

    70.8 °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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