Tongue River Reservoir Weather Forecast

    • 58
    • 91

    Chance Rain Showers

    • 60
    • 92

    Mostly Sunny

    • 63
    • 99

    Hot

    • 63
    • 100

    Hot

    • 56
    • 89

    Chance Rain Showers

    • 54
    • 83

    Slight Chance Thunderstorms

Today 17 Aug Southern Big Horn

Mostly sunny. Highs in the lower 90s. Northeast Winds 5 to 10 Mph.

Tonight 17 Aug Southern Big Horn

Mostly cloudy. Chance of Showers and Thunderstorms early in the Evening, then slight chance of Showers and Thunderstorms late in the evening. Lows in the upper 50s. South Winds 5 to 10 Mph. Chance of precipitation 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tongue River Reservoir Temperature Statistics

August Temperature

Sheridan County Airport (24.9 miles)

  • Lowest 9 August, 2025

    44.7 °F

  • Average August

    70.4 °F

  • Highest 6 August, 2025

    93.7 °F

Climate (2020–Present)

Sheridan County Airport (24.9 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    47 °F

  • Average High 2020–2025

    61.4 °F
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