Allentown Weather Forecast

    • 0
    • 14

    Mostly Cloudy

    • 3
    • 19

    Partly Sunny

    • 16
    • 24

    Mostly Cloudy

    • 17
    • 30

    Chance Snow

    • 12
    • 27

    Chance Snow

    • 11
    • 25

    Chance Snow

Today 31 Jan Allegheny

Mostly sunny in the Morning, then becoming partly sunny. Very cold with Highs around 14. Northwest Winds 5 to 10 Mph.

Tonight 31 Jan Allegheny

Mostly cloudy. Frigid. Lows around zero. Northwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

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Allentown Temperature Statistics

January Temperature

Pittsburgh - Allegheny County Airport (5.6 miles)

  • Lowest 24 January, 2026

    0 °F

  • Average January

    26 °F

  • Highest 9 January, 2026

    64.9 °F

Climate (2021–Present)

Pittsburgh - Allegheny County Airport (5.6 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    54.5 °F

  • Average High 2021–2026

    63.2 °F
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