Horn Island Weather Forecast

    • 51
    • 59

    Becoming Sunny

    • 53
    • 59

    Partly Sunny

    • 55
    • 61

    Rain Likely

    • 55
    • 59

    Rain Showers Likely

    • 54
    • 58

    Rain Showers Likely

    • 53
    • 59

    Chance Rain Showers

    • 54
    • 62

    Partly Sunny

Today 23 Sep Coastal York

Mostly sunny. Highs in the lower 60s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 23 Sep Coastal York

Mostly clear. Lows in the lower 40s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Horn Island Temperature Statistics

September Temperature

Pease Air Force Base / Portsmouth (6.8 miles)

  • Lowest 20 September, 2026

    42.8 °F

  • Average September

    64.6 °F

  • Highest 10 September, 2026

    86.5 °F

Climate (2021–2026)

Pease Air Force Base / Portsmouth (6.8 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    59.2 °F
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