Allentown Weather Forecast

    • 54
    • 64

    Rain

    • 50
    • 63

    Rain

    • 49
    • 64

    Partly Sunny

    • 48
    • 65

    Partly Sunny

    • 51
    • 64

    Mostly Cloudy

    • 52
    • 64

    Chance Rain

Today 24 Sep Lowlands of Pierce and Southern King Counties

Partly sunny in the Morning, then cloudy with a slight chance of rain in the afternoon. Highs in the upper 50s to mid 60s. Light wind becoming north to 10 Mph in the afternoon.

Tonight 24 Sep Lowlands of Pierce and Southern King Counties

A chance of rain in the Evening, then rain in the late evening and early morning. Rain likely in the morning. Rainfall Amounts a quarter to a half inch possible. Lows in the upper 40s to mid 50s. Light wind.

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Allentown Temperature Statistics

September Temperature

Renton Municipal Airport (2.5 miles)

  • Lowest 6 September, 2026

    51.1 °F

  • Average September

    61.6 °F

  • Highest 9 September, 2026

    79 °F

Climate (2021–2026)

Renton Municipal Airport (2.5 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    62.2 °F
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