Lower Brule Weather Forecast

    • 61
    • 82

    Thunderstorms

    • 60
    • 75

    Chance Rain Showers

    • 61
    • 75

    Rain Showers Likely

    • 58
    • 75

    Chance Rain Showers

    • 59
    • 76

    Chance Thunderstorms

    • 62
    • 79

    Chance Thunderstorms

Today 12 Aug Lyman

Partly sunny. A chance of Thunderstorms, mainly in the morning. Humid with Highs in the mid 80s. East Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 12 Aug Lyman

Mostly cloudy with a 50 percent chance of Thunderstorms. Lows in the mid 60s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lower Brule Temperature Statistics

August Temperature

Chamberlain, Chamberlain Municipal Airport (24.9 miles)

  • Lowest 5 August, 2026

    44.4 °F

  • Average August

    71.1 °F

  • Highest 2 August, 2026

    92.7 °F

Climate (2021–2026)

Chamberlain, Chamberlain Municipal Airport (24.9 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    47.8 °F

  • Average High 2021–2026

    59.6 °F
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