Glenn Weather Forecast

    • 28
    • 42

    Increasing Clouds

    • 33
    • 39

    Rain Showers Likely

    • 31
    • 39

    Rain Showers

    • 35
    • 42

    Slight Chance Rain Showers

    • 30
    • 46

    Chance Rain/Snow

    • 16
    • 39

    Chance Snow Showers

    • 20
    • 25

    Slight Chance Snow Showers

Today 23 Dec Allegan

Mostly sunny. Highs in the mid 40s. West Winds 5 to 10 Mph.

Tonight 23 Dec Allegan

Partly cloudy. Lows in the mid 20s. Northwest Winds 5 to 10 Mph becoming north after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Glenn Temperature Statistics

December Temperature

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

  • Lowest 8 December, 2025

    -2.2 °F

  • Average December

    27.1 °F

  • Highest 18 December, 2025

    51.8 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    51.1 °F

  • Average High 2020–2025

    59.3 °F
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