Cornwall Lake Weather Forecast

    • 48
    • 74

    Chance Rain Showers

    • 60
    • 75

    Chance Thunderstorms

    • 61
    • 83

    Rain Showers

    • 64
    • 77

    Rain Showers Likely

    • 59
    • 79

    Slight Chance Thunderstorms

    • 58
    • 77

    Partly Sunny

Today 13 Sep Van Buren

Partly sunny with a 50 percent chance of Showers. Highs in the mid 70s. Northwest Winds 10 to 15 Mph with Gusts to around 30 Mph.

Tonight 13 Sep Van Buren

Mostly clear. A 50 percent chance of rain Showers in the evening. Lows in the upper 40s. Northwest Winds around 10 Mph with Gusts to around 25 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cornwall Lake Temperature Statistics

September Temperature

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

  • Lowest 11 September, 2026

    51.8 °F

  • Average September

    73.3 °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

    42.8 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    59.5 °F
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