Tongue River Reservoir Weather Forecast

    • 40
    • 65

    Rain Showers Likely

    • 42
    • 75

    Chance Thunderstorms

    • 42
    • 78

    Partly Sunny

    • 43
    • 78

    Partly Sunny

    • 44
    • 78

    Chance Thunderstorms

    • 45
    • 81

    Mostly Sunny

Today 31 May Southern Big Horn

Decreasing Clouds. Rain Showers likely early in the Morning, then chance of rain Showers in the late morning and afternoon. Slight chance of Thunderstorms late in the afternoon. Highs in the mid 60s. Northwest Winds 15 to 25 Mph. Chance of precipitation 70 percent.

Tonight 31 May Southern Big Horn

Decreasing Clouds. A 20 percent chance of rain Showers early in the evening. Lows in the lower 40s. West Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tongue River Reservoir Temperature Statistics

May Temperature

Sheridan County Airport (24.9 miles)

  • Lowest 6 May, 2026

    16.6 °F
  • Average May

    52.8 °F
  • Highest 13 May, 2026

    95.6 °F

Climate (2021–Present)

Sheridan County Airport (24.9 miles)

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  • Average Low 2021–2026

    33.5 °F
  • Average 2021–2026

    47.7 °F
  • Average High 2021–2026

    62.3 °F
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