Great Falls Weather Forecast

    • 66
    • 89

    Increasing Clouds

    • 66
    • 82

    Rain Showers Likely

    • 72
    • 88

    Partly Sunny

    • 71
    • 91

    Rain Showers Likely

    • 66
    • 85

    Thunderstorms Likely

    • 64
    • 87

    Mostly Sunny

    • 69
    • 90

    Partly Sunny

Today 15 Jun Chester

Mostly sunny. Near steady Temperatures in the upper 80s. Northwest Winds around 5 Mph.

Tonight 15 Jun Chester

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the mid 60s. Northwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Falls Temperature Statistics

June Temperature

Lancaster County-mc Whirter Field (10.6 miles)

  • Lowest 3 June, 2026

    50 °F

  • Average June

    75.5 °F

  • Highest 12 June, 2026

    96.8 °F

Climate (2021–Present)

Lancaster County-mc Whirter Field (10.6 miles)

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  • Average Low 2021–2026

    52 °F

  • Average 2021–2026

    62.4 °F

  • Average High 2021–2026

    73.9 °F
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