Tongue River Reservoir Weather Forecast

    • 64
    • 91

    Chance Thunderstorms

    • 63
    • 91

    Chance Rain Showers

    • 66
    • 102

    Hot

    • 68
    • 104

    Hot

    • 65
    • 101

    Hot

    • 65
    • 97

    Slight Chance Thunderstorms

Today 22 Jul Southern Big Horn

Mostly sunny. Isolated Showers and Thunderstorms late in the afternoon. Some Thunderstorms may produce heavy rainfall late in the afternoon. Highs around 90. Northeast Winds 5 to 10 Mph. Chance of precipitation 20 percent.

Tonight 22 Jul Southern Big Horn

Cloudy. Chance of Showers and Thunderstorms in the Evening, then slight chance of Showers and Thunderstorms overnight. Patchy smoke overnight. Some Thunderstorms may produce heavy rainfall early in the evening. Some Thunderstorms may produce heavy rainfall in the late evening and overnight. Lows in the mid 60s. Southeast 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

July Temperature

Sheridan County Airport (24.9 miles)

  • Lowest 1 July, 2026

    46.7 °F

  • Average July

    76 °F

  • Highest 12 July, 2026

    109.7 °F

Climate (2021–2026)

Sheridan County Airport (24.9 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    62.1 °F
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