Bismarck Weather Forecast

    • 71
    • 96

    Partly Sunny

    • 66
    • 94

    Chance Thunderstorms

    • 59
    • 83

    Rain Showers Likely

    • 53
    • 73

    Partly Sunny

    • 53
    • 74

    Partly Sunny

    • 55
    • 76

    Partly Sunny

Today 19 Sep St. Francois

Mostly sunny. Hot with Highs in the upper 90s. Southwest Winds around 5 Mph.

Tonight 19 Sep St. Francois

Partly cloudy in the Evening, then clearing. Lows around 70. Southwest Winds around 5 Mph.

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Bismarck Temperature Statistics

September Temperature

Farmington Airport (9.9 miles)

  • Lowest 14 September, 2026

    63 °F

  • Average September

    79.8 °F

  • Highest 4 September, 2026

    96.1 °F

Climate (2021–2026)

Farmington Airport (9.9 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    57.3 °F

  • Average High 2021–2026

    67.4 °F
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