Allendale Weather Forecast

    • 66
    • 89

    Slight Chance Thunderstorms

    • 65
    • 88

    Mostly Sunny

    • 63
    • 89

    Mostly Sunny

    • 65
    • 87

    Partly Sunny

    • 66
    • 85

    Mostly Cloudy

    • 67
    • 87

    Slight Chance Thunderstorms

Today 18 Sep Allendale

Sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs in the upper 80s. Light and variable Winds, becoming south around 5 Mph this afternoon. Chance of rain 20 percent.

Tonight 18 Sep Allendale

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the mid 60s. Southeast Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 20 percent.

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Allendale Temperature Statistics

September Temperature

Allendale County Airport (1.9 miles)

  • Lowest 15 September, 2025

    55.4 °F

  • Average September

    73.4 °F

  • Highest 5 September, 2025

    91.4 °F

Climate (2020–Present)

Allendale County Airport (1.9 miles)

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  • Average Low 2020–2025

    55.8 °F

  • Average 2020–2025

    65.4 °F

  • Average High 2020–2025

    76.3 °F
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