Johnston Lake Weather Forecast

    • 73
    • 100

    Thunderstorms Likely

    • 75
    • 101

    Slight Chance Thunderstorms

    • 76
    • 103

    Hot

    • 75
    • 101

    Hot

    • 75
    • 101

    Hot

    • 74
    • 100

    Hot

Today 10 Sep Young

Sunny with a slight chance of Showers and Thunderstorms in the Morning, then partly sunny with a chance of Showers and Thunderstorms in the afternoon. Hot with Highs around 100. Southwest Winds around 5 Mph, becoming southeast in the afternoon. Chance of rain 50 percent.

Tonight 10 Sep Young

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then a slight chance of Showers and Thunderstorms after midnight. Lows in the mid 70s. Southeast Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnston Lake Temperature Statistics

September Temperature

Graham, Graham Municipal Airport (8.7 miles)

  • Lowest 1 September, 2026

    72.7 °F

  • Average September

    88.4 °F

  • Highest 3 September, 2026

    103.6 °F

Climate (2021–2026)

Graham, Graham Municipal Airport (8.7 miles)

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  • Average Low 2021–2026

    54.5 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    79.3 °F
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