Osterhout Lake Weather Forecast

    • 54
    • 80

    Becoming Sunny

    • 55
    • 79

    Mostly Sunny

    • 58
    • 80

    Partly Sunny

    • 69
    • 83

    Mostly Cloudy

    • 64
    • 83

    Slight Chance Thunderstorms

    • 54
    • 77

    Slight Chance Rain Showers

Today 5 Sep Allegan

Patchy fog in the morning. Mostly cloudy with a 30 percent chance of Showers. Highs in the upper 70s. Northeast Winds around 10 Mph with Gusts to around 20 Mph.

Tonight 5 Sep Allegan

Mostly clear. Lows in the mid 50s. Northeast Winds 5 to 10 Mph with Gusts to around 20 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Osterhout Lake Temperature Statistics

September Temperature

South Haven, South Haven Area Regional Airport (12.4 miles)

  • Lowest 1 September, 2026

    77 °F

  • Average September

    82.6 °F

  • Highest 2 September, 2026

    93.2 °F

Climate (2021–2026)

South Haven, South Haven Area Regional Airport (12.4 miles)

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  • Average Low 2021–2026

    42.7 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    59.5 °F
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