O'Brien Lake Weather Forecast

    • 70
    • 78

    Rain Showers

    • 64
    • 81

    Rain Showers Likely

    • 57
    • 78

    Mostly Sunny

    • 63
    • 80

    Chance Thunderstorms

    • 59
    • 79

    Chance Thunderstorms

    • 57
    • 74

    Slight Chance Thunderstorms

Today 15 Aug Southern Berrien

A chance of Showers with a slight chance of Thunderstorms Early, then Showers with a chance of Thunderstorms. Humid with Highs in the upper 70s. Southeast Winds 5 to 10 Mph. Gusts up to 20 Mph. Chance of rain 90 percent.

Tonight 15 Aug Southern Berrien

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Humid with Lows around 70. South Winds around 5 Mph. Chance of rain 50 percent.

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O'Brien Lake Temperature Statistics

August Temperature

Southwest Michigan Regional Airport (13 miles)

  • Lowest 9 August, 2026

    55.7 °F

  • Average August

    72.5 °F

  • Highest 7 August, 2026

    87.7 °F

Climate (2021–2026)

Southwest Michigan Regional Airport (13 miles)

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  • Average Low 2021–2026

    43.2 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    60.8 °F
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