Riviera Canal, Key West Weather Forecast

    • 80
    • 89

    Chance Rain Showers

    • 78
    • 89

    Chance Thunderstorms

    • 77
    • 88

    Rain Showers Likely

    • 79
    • 87

    Rain Showers Likely

    • 79
    • 88

    Rain Showers Likely

    • 79
    • 89

    Rain Showers Likely

Today 15 Sep Monroe Lower Keys

Mostly sunny with a chance of Showers and a slight chance of Thunderstorms. Highs near 90. Variable Winds near 5 Mph, becoming east to southeast. Chance of rain 30 percent.

Tonight 15 Sep Monroe Lower Keys

Partly cloudy with a chance of Showers and a slight chance of Thunderstorms. Lows near 80. Northeast to east Winds 5 to 10 Mph. Chance of rain 30 percent.

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Riviera Canal, Key West Temperature Statistics

September Temperature

Key West International Airport (0 miles)

  • Lowest 4 September, 2025

    75 °F

  • Average September

    83.5 °F

  • Highest 11 September, 2025

    91 °F

Climate (2020–Present)

Key West International Airport (0 miles)

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  • Average Low 2020–2025

    75.6 °F

  • Average 2020–2025

    79.6 °F

  • Average High 2020–2025

    83.9 °F
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