Glen Ullin Weather Forecast

    • 54
    • 82

    Chance Thunderstorms

    • 50
    • 69

    Rain Showers Likely

    • 49
    • 59

    Rain Showers Likely

    • 48
    • 66

    Chance Rain Showers

    • 50
    • 73

    Partly Sunny

    • 51
    • 78

    Partly Sunny

    • 47
    • 72

    Mostly Sunny

Today 16 Sep Morton

Sunny. Highs in the upper 70s. Light and variable Winds, becoming northwest up to 5 Mph in the afternoon.

Tonight 16 Sep Morton

Mostly cloudy. A chance of Showers and Thunderstorms after midnight. Lows in the upper 50s. North Winds around 5 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Glen Ullin Temperature Statistics

September Temperature

Glen Ullin Regional Airport (1.2 miles)

  • Lowest 6 September, 2025

    28.4 °F

  • Average September

    61.8 °F

  • Highest 12 September, 2025

    89.6 °F

Climate (2020–Present)

Glen Ullin Regional Airport (1.2 miles)

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  • Average Low 2020–2025

    30 °F

  • Average 2020–2025

    43.3 °F

  • Average High 2020–2025

    55.5 °F
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