Portsmouth Weather Forecast

    • 62
    • 85

    Partly Sunny

    • 70
    • 90

    Partly Sunny

    • 52
    • 81

    Rain Showers

    • 51
    • 71

    Chance Rain Showers

    • 48
    • 74

    Slight Chance Rain Showers

    • 41
    • 71

    Mostly Sunny

    • 42
    • 67

    Mostly Sunny

Today 30 Sep Scioto

Mostly sunny. Highs in the lower 70s.

Tonight 30 Sep Scioto

Partly Cloudy, then becoming mostly clear this late evening and early Morning, then becoming partly cloudy. Lows in the lower 60s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portsmouth Temperature Statistics

September Temperature

Ashland Regional Airport (18.6 miles)

  • Lowest 15 September, 2026

    54 °F

  • Average September

    74.4 °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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