Portsmouth Weather Forecast

    • 70
    • 92

    Slight Chance Thunderstorms

    • 69
    • 93

    Chance Rain Showers

    • 63
    • 84

    Slight Chance Thunderstorms

    • 69
    • 90

    Chance Thunderstorms

    • 67
    • 90

    Chance Rain Showers

    • 65
    • 87

    Chance Rain Showers

    • 65
    • 85

    Chance Rain Showers

Today 16 Sep Scioto

Partly cloudy. A chance of Showers in the afternoon. Highs in the lower 80s. Chance of rain 30 percent.

Tonight 16 Sep Scioto

Partly cloudy with a slight chance of Showers and Thunderstorms this Evening, then mostly clear after midnight. Unseasonably warm with Lows around 70. South Winds around 5 Mph early this Evening, becoming light and Variable, then becoming southwest around 5 Mph late. Chance of rain 20 percent.

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Portsmouth Temperature Statistics

September Temperature

Ashland Regional Airport (18.6 miles)

  • Lowest 14 September, 2026

    60.1 °F

  • Average September

    76.6 °F

  • Highest 3 September, 2026

    98.1 °F

Climate (2021–2026)

Ashland Regional Airport (18.6 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    56.2 °F

  • Average High 2021–2026

    67.5 °F
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