O'Brien Lake Weather Forecast

    • 46
    • 64

    Decreasing Clouds

    • 46
    • 71

    Mostly Sunny

    • 38
    • 64

    Mostly Sunny

    • 42
    • 66

    Mostly Sunny

    • 49
    • 72

    Mostly Sunny

    • 53
    • 76

    Mostly Sunny

Today 6 May Southern Berrien

Mostly cloudy this Morning, then becoming partly cloudy. Highs in the lower 60s. Northwest Winds 10 to 15 Mph.

Tonight 6 May Southern Berrien

Mostly clear. Lows in the mid 40s. Northwest Winds 5 to 10 Mph.

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O'Brien Lake Temperature Statistics

May Temperature

Southwest Michigan Regional Airport (13 miles)

  • Lowest 3 May, 2025

    42.1 °F

  • Average May

    51.8 °F

  • Highest 1 May, 2025

    73.7 °F

Climate (2020–Present)

Southwest Michigan Regional Airport (13 miles)

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  • Average Low 2020–2025

    43.6 °F

  • Average 2020–2025

    52.1 °F

  • Average High 2020–2025

    60.6 °F
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