Roundup Airport Weather Forecast

    • 61
    • 86

    Chance Thunderstorms

    • 63
    • 91

    Slight Chance Thunderstorms

    • 64
    • 96

    Chance Thunderstorms

    • 63
    • 98

    Chance Thunderstorms

    • 61
    • 94

    Partly Sunny

    • 60
    • 88

    Partly Sunny

Today 15 Jul Musselshell

Partly sunny. Scattered Showers and Thunderstorms late in the afternoon. Some Thunderstorms may produce heavy rainfall late in the afternoon. Highs in the mid 80s. North Winds 5 to 15 Mph. Chance of precipitation 30 percent.

Tonight 15 Jul Musselshell

Mostly cloudy. A 50 percent chance of Showers and Thunderstorms early in the evening. Some Thunderstorms may produce heavy rainfall early in the evening. Lows in the lower 60s. North Winds 5 to 10 Mph in the evening becoming light overnight.

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Roundup Airport Temperature Statistics

July Temperature

N BAR Ranch Airport (31.1 miles)

  • Lowest 1 July, 2026

    44.6 °F

  • Average July

    69.1 °F

  • Highest 12 July, 2026

    104 °F

Climate (2021–2026)

N BAR Ranch Airport (31.1 miles)

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  • Average Low 2021–2026

    31.8 °F

  • Average 2021–2026

    44 °F

  • Average High 2021–2026

    55.3 °F
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