Lostmans River - Onion Key Weather Forecast

    • 65
    • 85

    Mostly Sunny

    • 69
    • 86

    Mostly Sunny

    • 66
    • 87

    Chance Rain Showers

    • 54
    • 81

    Slight Chance Rain Showers

    • 55
    • 82

    Sunny

    • 58
    • 84

    Mostly Sunny

Today 14 Mar Mainland Monroe

Sunny. Highs in the lower 80s. Northeast Winds around 5 Mph, becoming southeast in the afternoon.

Tonight 14 Mar Mainland Monroe

Partly cloudy. Near steady temperature in the mid 60s. Northeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lostmans River - Onion Key Temperature Statistics

March Temperature

Miami, Kendall-Tamiami Executive Airport (43.5 miles)

  • Lowest 7 March, 2025

    45.6 °F

  • Average March

    69.9 °F

  • Highest 5 March, 2025

    86.6 °F

Climate (2020–Present)

Miami, Kendall-Tamiami Executive Airport (43.5 miles)

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  • Average Low 2020–2025

    70 °F

  • Average 2020–2025

    77.6 °F

  • Average High 2020–2025

    85.9 °F
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