O'Brien Lake Weather Forecast

    • 37
    • 55

    Mostly Sunny

    • 40
    • 61

    Mostly Sunny

    • 42
    • 64

    Partly Sunny

    • 51
    • 69

    Mostly Cloudy

    • 52
    • 69

    Chance Rain Showers

    • 51
    • 67

    Slight Chance Rain Showers

Today 23 May Southern Berrien

Partly cloudy late this Morning, then becoming mostly sunny. Highs in the mid 50s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 23 May Southern Berrien

Mostly clear. Patchy frost after midnight. Lows in the upper 30s. North Winds 10 to 15 Mph, becoming northwest around 5 Mph after midnight.

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O'Brien Lake Temperature Statistics

May Temperature

Southwest Michigan Regional Airport (13 miles)

  • Lowest 9 May, 2025

    32.6 °F

  • Average May

    55.9 °F

  • Highest 15 May, 2025

    87.7 °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

    60.7 °F
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