Lostmans River - Onion Key Weather Forecast

    • 66
    • 86

    Partly Sunny

    • 69
    • 82

    Increasing Clouds

    • 69
    • 84

    Mostly Cloudy

    • 70
    • 83

    Mostly Cloudy

    • 70
    • 85

    Partly Sunny

    • 70
    • 87

    Mostly Sunny

    • 69
    • 87

    Mostly Sunny

Today 3 Nov Mainland Monroe

Mostly sunny. Highs in the mid 80s. North Winds 5 to 10 Mph.

Tonight 3 Nov Mainland Monroe

Partly cloudy. Lows in the upper 60s. Northeast Winds 10 to 15 Mph.

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Lostmans River - Onion Key Temperature Statistics

November Temperature

Miami, Kendall-Tamiami Executive Airport (43.5 miles)

  • Lowest 1 November, 2025

    59 °F

  • Average November

    70.3 °F

  • Highest 1 November, 2025

    80.1 °F

Climate (2020–Present)

Miami, Kendall-Tamiami Executive Airport (43.5 miles)

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  • Average Low 2020–2025

    69.4 °F

  • Average 2020–2025

    77.3 °F

  • Average High 2020–2025

    85.7 °F
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