Fallon Weather Forecast

    • 53
    • 81

    Chance Rain Showers

    • 48
    • 78

    Slight Chance Thunderstorms

    • 46
    • 73

    Partly Sunny

    • 46
    • 75

    Partly Sunny

    • 49
    • 82

    Partly Sunny

    • 49
    • 82

    Partly Sunny

    • 46
    • 77

    Mostly Sunny

Today 16 Sep Prairie

Mostly sunny. A slight chance of Showers late this Morning, then a chance of Showers this afternoon. Highs around 80. Southwest wind around 5 Mph. Chance of rain 30 percent.

Tonight 16 Sep Prairie

A slight chance of Thunderstorms this evening. Mostly cloudy with a chance of Showers. Lows in the mid 50s. North wind around 5 Mph this Evening, becoming light and variable. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fallon Temperature Statistics

September Temperature

Glendive, Dawson Community Airport (25.5 miles)

  • Lowest 5 September, 2025

    37.9 °F

  • Average September

    65.2 °F

  • Highest 10 September, 2025

    89.1 °F

Climate (2020–Present)

Glendive, Dawson Community Airport (25.5 miles)

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  • Average Low 2020–2025

    33.3 °F

  • Average 2020–2025

    44.8 °F

  • Average High 2020–2025

    56.3 °F
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