Glenn Weather Forecast

    • 63
    • 77

    Decreasing Clouds

    • 52
    • 71

    Chance Rain Showers

    • 62
    • 71

    Partly Sunny

    • 61
    • 76

    Rain Showers Likely

    • 60
    • 72

    Rain Showers Likely

    • 57
    • 72

    Chance Rain Showers

Today 12 Sep Allegan

Mostly sunny. Highs in the lower 80s. South Winds around 10 Mph becoming southwest in the afternoon.

Tonight 12 Sep Allegan

Partly cloudy. Lows in the upper 50s. West Winds around 10 Mph with Gusts to around 20 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Glenn Temperature Statistics

September Temperature

South Haven, South Haven Area Regional Airport (11.2 miles)

  • Lowest 7 September, 2026

    57.2 °F

  • Average September

    74.7 °F

  • Highest 2 September, 2026

    93.2 °F

Climate (2021–2026)

South Haven, South Haven Area Regional Airport (11.2 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    59.5 °F
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