Tongue River Reservoir State Park Weather Forecast

    • 46
    • 78

    Slight Chance Thunderstorms

    • 46
    • 79

    Mostly Sunny

    • 50
    • 87

    Mostly Sunny

    • 54
    • 87

    Chance Rain Showers

    • 49
    • 84

    Chance Rain Showers

    • 42
    • 73

    Rain Showers Likely

    • 40
    • 56

    Rain Showers Likely

Today 8 May Southern Big Horn

Mostly sunny. A 20 percent chance of Showers and Thunderstorms late in the afternoon. Highs in the upper 70s. Northwest Winds 5 to 15 Mph.

Tonight 8 May Southern Big Horn

Partly cloudy. Slight chance of Showers and Thunderstorms early in the evening. Slight chance of rain Showers overnight. Lows in the upper 40s. Southwest Winds 5 to 10 Mph. Chance of precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tongue River Reservoir State Park Temperature Statistics

May Temperature

Sheridan County Airport (25.5 miles)

  • Lowest 2 May, 2025

    29.8 °F

  • Average May

    50.3 °F

  • Highest 4 May, 2025

    81.6 °F

Climate (2020–Present)

Sheridan County Airport (25.5 miles)

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  • Average Low 2020–2025

    33.1 °F

  • Average 2020–2025

    47.1 °F

  • Average High 2020–2025

    61.5 °F
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