Gallatin Forks Weather Forecast

    • 49
    • 75

    Partly Sunny

    • 45
    • 74

    Mostly Sunny

    • 47
    • 79

    Mostly Sunny

    • 45
    • 80

    Slight Chance Rain

    • 40
    • 66

    Slight Chance Rain

    • 41
    • 66

    Mostly Cloudy

Today 22 Sep Gallatin Valley

Mostly sunny. Highs in the lower 60s.

Tonight 22 Sep Gallatin Valley

Mostly cloudy. Slight chance of rain Showers early in the evening. Chance of rain Showers late in the Evening, then slight chance of rain Showers after midnight. Lows in the upper 40s. South Winds up to 10 Mph. Gusts up to 20 Mph in the evening. Chance of Showers 50 percent.

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Gallatin Forks Temperature Statistics

September Temperature

Bozeman, Gallatin Field (9.9 miles)

  • Lowest 15 September, 2026

    33.7 °F

  • Average September

    59.2 °F

  • Highest 10 September, 2026

    86.6 °F

Climate (2021–2026)

Bozeman, Gallatin Field (9.9 miles)

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  • Average Low 2021–2026

    31.3 °F

  • Average 2021–2026

    45 °F

  • Average High 2021–2026

    58.5 °F
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