Clear Lake Weather Forecast

    • 49
    • 68

    Rain Likely

    • 46
    • 65

    Mostly Cloudy

    • 46
    • 63

    Mostly Cloudy

    • 47
    • 64

    Mostly Cloudy

    • 47
    • 66

    Mostly Cloudy

    • 45
    • 68

    Partly Sunny

Today 20 Sep Allegan

Rain and a slight chance of Thunderstorms in the Morning, then a chance of rain in the afternoon. Patchy fog through the day. Highs in the upper 60s. Northeast Winds 5 to 15 Mph with Gusts to around 25 Mph. Chance of rain 100 percent.

Tonight 20 Sep Allegan

Partly cloudy. Lows around 50. Northeast Winds 5 to 15 Mph with Gusts to around 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clear Lake Temperature Statistics

September Temperature

South Haven, South Haven Area Regional Airport (13 miles)

  • Lowest 14 September, 2026

    48.2 °F

  • Average September

    71.2 °F

  • Highest 2 September, 2026

    93.2 °F

Climate (2021–2026)

South Haven, South Haven Area Regional Airport (13 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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