Jonesborough Weather Forecast

    • 66
    • 84

    Rain Showers

    • 64
    • 84

    Slight Chance Thunderstorms

    • 63
    • 84

    Partly Sunny

    • 62
    • 87

    Mostly Sunny

    • 63
    • 87

    Mostly Sunny

    • 64
    • 88

    Chance Rain Showers

Today 12 Sep Washington

Mostly cloudy with a slight chance of Showers and Thunderstorms this Morning, then Showers with a chance of Thunderstorms this afternoon. Highs in the lower to mid 80s. Light Winds. Chance of rain 90 percent.

Tonight 12 Sep Washington

A chance of Showers and Thunderstorms in the Evening, then Showers likely after midnight. A slight chance of Showers late. Lows in the upper 60s. Light Winds. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Jonesborough Temperature Statistics

September Temperature

Bristol / Johnson / Kingsport, Tri-City Regional Airport (13 miles)

  • Lowest 8 September, 2026

    59 °F

  • Average September

    77.3 °F

  • Highest 4 September, 2026

    97.6 °F

Climate (2021–2026)

Bristol / Johnson / Kingsport, Tri-City Regional Airport (13 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    70.3 °F
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