Augusta Weather Forecast

    • 30
    • 55

    Slight Chance Rain Showers

    • 40
    • 65

    Chance Rain

    • 37
    • 56

    Rain

    • 39
    • 65

    Partly Sunny

    • 43
    • 69

    Partly Sunny

    • 48
    • 75

    Partly Sunny

    • 50
    • 77

    Partly Sunny

Today 18 May Southern High Plains

Not as cool. Partly sunny. Slight chance of rain Showers and snow Showers early in the Afternoon, then slight chance of Thunderstorms late in the afternoon. Highs in the lower 50s. East Winds up to 5 Mph. Chance of precipitation 20 percent.

Tonight 18 May Southern High Plains

Mostly cloudy with a 20 percent chance of rain Showers in the Evening, then partly cloudy after midnight. Lows around 30. Southwest Winds up to 10 Mph. Gusts up to 25 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Augusta Temperature Statistics

May Temperature

Great Falls, Great Falls International Airport (46.6 miles)

  • Lowest 6 May, 2026

    23.6 °F

  • Average May

    54.5 °F

  • Highest 13 May, 2026

    89.7 °F

Climate (2021–Present)

Great Falls, Great Falls International Airport (46.6 miles)

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  • Average Low 2021–2026

    34.4 °F

  • Average 2021–2026

    47 °F

  • Average High 2021–2026

    59.2 °F
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