Fairfield Weather Forecast

    • 53
    • 81

    Slight Chance Thunderstorms

    • 57
    • 87

    Slight Chance Rain Showers

    • 59
    • 95

    Mostly Sunny

    • 54
    • 90

    Mostly Sunny

    • 50
    • 80

    Mostly Sunny

    • 49
    • 76

    Mostly Sunny

Today 17 Aug Eastern Pondera and Eastern Teton

Not as warm. Partly cloudy. A 20 percent chance of rain Showers in the afternoon. Highs 80 to 85. West Winds up to 10 Mph.

Tonight 17 Aug Eastern Pondera and Eastern Teton

Mostly cloudy in the evening then clearing. Lows 50 to 55. West Winds up to 10 Mph.

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Fairfield Temperature Statistics

August Temperature

Great Falls, Great Falls International Airport (29.2 miles)

  • Lowest 8 August, 2025

    48.7 °F

  • Average August

    68.8 °F

  • Highest 13 August, 2025

    94.6 °F

Climate (2020–Present)

Great Falls, Great Falls International Airport (29.2 miles)

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  • Average Low 2020–2025

    34 °F

  • Average 2020–2025

    46.4 °F

  • Average High 2020–2025

    58.3 °F
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