Sully Lake Weather Forecast

    • 69
    • 101

    Chance Thunderstorms

    • 65
    • 97

    Patchy Smoke

    • 61
    • 85

    Partly Sunny

    • 63
    • 85

    Chance Rain Showers

    • 63
    • 87

    Chance Rain Showers

    • 67
    • 92

    Mostly Sunny

Today 19 Jul Sully

Partly sunny. Hot with Highs in the upper 90s. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 19 Jul Sully

Mostly clear with a 30 percent chance of Thunderstorms. Humid with Lows in the upper 60s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Heat index Values up to 102 early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sully Lake Temperature Statistics

July Temperature

Pierre, Pierre Regional Airport (23.6 miles)

  • Lowest 9 July, 2026

    59.6 °F

  • Average July

    79.6 °F

  • Highest 16 July, 2026

    101.6 °F

Climate (2021–2026)

Pierre, Pierre Regional Airport (23.6 miles)

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  • Average Low 2021–2026

    36.9 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    61.4 °F
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