Tongue River Reservoir State Park Weather Forecast

    • 40
    • 70

    Partly Sunny

    • 34
    • 81

    Mostly Cloudy

    • 23
    • 48

    Chance Rain/Snow

    • 26
    • 54

    Mostly Sunny

    • 34
    • 66

    Partly Sunny

    • 38
    • 73

    Partly Sunny

Today 24 Mar Southern Big Horn

Mostly sunny. Highs around 70. Northwest Winds 5 to 10 Mph.

Tonight 24 Mar Southern Big Horn

Partly cloudy. Lows in the upper 40s. South Winds 5 to 10 Mph.

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Tongue River Reservoir State Park Temperature Statistics

March Temperature

Sheridan County Airport (25.5 miles)

  • Lowest 15 March, 2026

    8.7 °F

  • Average March

    42 °F

  • Highest 21 March, 2026

    82 °F

Climate (2021–Present)

Sheridan County Airport (25.5 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    62.1 °F
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