St. Augustine Weather Forecast

    • 77
    • 84

    Increasing Clouds

    • 76
    • 84

    Slight Chance Thunderstorms

    • 75
    • 83

    Chance Thunderstorms

    • 75
    • 82

    Chance Thunderstorms

    • 74
    • 84

    Rain Showers Likely

    • 75
    • 85

    Rain Showers Likely

    • 75
    • 84

    Rain Showers Likely

Today 17 Sep Southeast Coastal St. Johns

Mostly sunny with a 20 percent chance of Showers. Highs in the upper 80s. Northeast Winds 15 to 20 Mph.

Tonight 17 Sep Southeast Coastal St. Johns

Partly cloudy with a 20 percent chance of Showers. Lows in the mid 70s. Northeast Winds 15 to 20 Mph.

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St. Augustine Temperature Statistics

September Temperature

Northeast Florida Regional Airport (4.3 miles)

  • Lowest 7 September, 2026

    73.9 °F

  • Average September

    81 °F

  • Highest 13 September, 2026

    90 °F

Climate (2021–2026)

Northeast Florida Regional Airport (4.3 miles)

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  • Average Low 2021–2026

    63.7 °F

  • Average 2021–2026

    70.8 °F

  • Average High 2021–2026

    78.1 °F
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