Glen Ullin Weather Forecast

    • 65
    • 91

    Partly Sunny

    • 64
    • 100

    Chance Rain Showers

    • 58
    • 90

    Breezy

    • 56
    • 84

    Partly Sunny

    • 59
    • 87

    Partly Sunny

    • 61
    • 90

    Partly Sunny

Today 18 Jul Western Morton

Partly sunny. Highs around 90. South Winds 5 to 15 Mph with Gusts up to 25 Mph.

Tonight 18 Jul Western Morton

Partly cloudy with a slight chance of Thunderstorms. A chance of Showers after midnight. Lows in the mid 60s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

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Glen Ullin Temperature Statistics

July Temperature

Glen Ullin Regional Airport (1.2 miles)

  • Lowest 1 July, 2026

    50 °F

  • Average July

    75.3 °F

  • Highest 12 July, 2026

    107.6 °F

Climate (2021–2026)

Glen Ullin Regional Airport (1.2 miles)

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  • Average Low 2021–2026

    30.2 °F

  • Average 2021–2026

    43.2 °F

  • Average High 2021–2026

    55.4 °F
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