Williams Field Weather Forecast

    • 50
    • 68

    Chance Rain Showers

    • 50
    • 73

    Rain Showers

    • 48
    • 68

    Rain Showers Likely

    • 51
    • 66

    Rain Showers Likely

    • 48
    • 64

    Rain Showers Likely

    • 46
    • 66

    Slight Chance Rain Showers

    • 48
    • 69

    Partly Sunny

Today 3 Sep Southern High Plains

Cooler, sunny. Near steady temperature in the mid 60s. Southwest Winds 10 to 15 Mph with Gusts to around 30 Mph.

Tonight 3 Sep Southern High Plains

Mostly cloudy until early morning then becoming partly cloudy. A 20 percent chance of rain Showers in the late evening and overnight. Lows in the upper 40s. Northwest Winds up to 5 Mph. Gusts up to 20 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Williams Field Temperature Statistics

September Temperature

Great Falls, Great Falls International Airport (46.6 miles)

  • Lowest 1 September, 2026

    48 °F

  • Average September

    66.9 °F

  • Highest 1 September, 2026

    86 °F

Climate (2021–2026)

Great Falls, Great Falls International Airport (46.6 miles)

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  • Average Low 2021–2026

    34.3 °F

  • Average 2021–2026

    46.9 °F

  • Average High 2021–2026

    59.1 °F
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