Blount Island Weather Forecast

    • 71
    • 87

    Partly Sunny

    • 73
    • 86

    Mostly Sunny

    • 73
    • 85

    Chance Thunderstorms

    • 74
    • 84

    Chance Thunderstorms

    • 74
    • 85

    Chance Thunderstorms

    • 73
    • 87

    Chance Thunderstorms

Today 18 Sep Coastal Duval

Sunny. Highs in the upper 80s. North Winds 5 to 10 Mph, becoming east 10 to 15 Mph in the afternoon.

Tonight 18 Sep Coastal Duval

Partly cloudy. Lows in the upper 60s. South Winds around 5 Mph.

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Blount Island Temperature Statistics

September Temperature

Jacksonville Craig Municipal Airport (4.3 miles)

  • Lowest 15 September, 2025

    64 °F

  • Average September

    77 °F

  • Highest 5 September, 2025

    88 °F

Climate (2020–Present)

Jacksonville Craig Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    62.8 °F

  • Average 2020–2025

    71.1 °F

  • Average High 2020–2025

    80.5 °F
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