Portsmouth Weather Forecast

    • 74
    • 97

    Hot

    • 73
    • 98

    Hot

    • 71
    • 95

    Chance Thunderstorms

    • 66
    • 90

    Chance Thunderstorms

    • 62
    • 87

    Mostly Sunny

    • 65
    • 88

    Partly Sunny

    • 67
    • 89

    Partly Sunny

Today 2 Sep Scioto

Sunny, hot with Highs in the mid 90s. Southwest Winds around 5 Mph.

Tonight 2 Sep Scioto

Clear. Unseasonably warm with Lows in the lower 70s. Southwest Winds around 5 Mph early this Evening, becoming light and variable.

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Portsmouth Temperature Statistics

September Temperature

Ashland Regional Airport (18.6 miles)

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  • Average September

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Climate (2021–2026)

Ashland Regional Airport (18.6 miles)

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  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    56.2 °F

  • Average High 2021–2026

    67.4 °F
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