Lostmans River - Onion Key Weather Forecast

    • 50
    • 65

    Mostly Sunny

    • 46
    • 74

    Sunny

    • 49
    • 75

    Mostly Sunny

    • 51
    • 76

    Mostly Sunny

    • 55
    • 78

    Mostly Sunny

    • 56
    • 79

    Mostly Sunny

Today 6 Feb Mainland Monroe

Sunny. Highs in the mid 60s. Northwest Winds 10 to 15 Mph.

Tonight 6 Feb Mainland Monroe

Mostly clear. Lows around 50. West Winds 5 to 10 Mph.

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  • Temperature Real-Time

Lostmans River - Onion Key Temperature Statistics

February Temperature

Miami, Kendall-Tamiami Executive Airport (43.5 miles)

  • Lowest 1 February, 2026

    32.6 °F

  • Average February

    51.4 °F

  • Highest 4 February, 2026

    73.9 °F

Climate (2021–Present)

Miami, Kendall-Tamiami Executive Airport (43.5 miles)

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  • Average Low 2021–2026

    69.3 °F

  • Average 2021–2026

    77.3 °F

  • Average High 2021–2026

    85.7 °F
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