Missouri Headwaters State Park Weather Forecast

    • 49
    • 82

    Increasing Clouds

    • 40
    • 71

    Rain Showers Likely

    • 40
    • 73

    Mostly Sunny

    • 44
    • 80

    Mostly Sunny

    • 47
    • 82

    Partly Sunny

    • 44
    • 78

    Chance Rain Showers

Today 6 Sep Missouri Headwaters

Sunny. Areas of fog in the morning. Highs in the upper 70s. North Winds up to 5 Mph shifting to the east in the afternoon. Gusts up to 25 Mph.

Tonight 6 Sep Missouri Headwaters

Mostly cloudy. Rain Showers likely after midnight. Areas of fog after midnight. Lows in the upper 40s. South Winds 5 to 10 Mph shifting to the northwest after midnight. Gusts up to 25 Mph. Chance of Showers 70 percent.

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Missouri Headwaters State Park Temperature Statistics

September Temperature

Bozeman, Gallatin Field (18.6 miles)

  • Lowest 1 September, 2026

    44.7 °F

  • Average September

    64.4 °F

  • Highest 2 September, 2026

    83.6 °F

Climate (2021–2026)

Bozeman, Gallatin Field (18.6 miles)

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  • Average Low 2021–2026

    31.3 °F

  • Average 2021–2026

    45 °F

  • Average High 2021–2026

    58.6 °F
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