Bismarck Weather Forecast

    • 66
    • 90

    Increasing Clouds

    • 65
    • 90

    Partly Sunny

    • 67
    • 88

    Mostly Sunny

    • 69
    • 93

    Mostly Sunny

    • 70
    • 92

    Mostly Sunny

    • 67
    • 88

    Chance Thunderstorms

Today 12 Sep St. Francois

Patchy fog in the morning. Mostly sunny. Warmer with Highs around 90. West Winds around 5 Mph.

Tonight 12 Sep St. Francois

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 60s. East Winds around 5 Mph, becoming south after midnight.

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Bismarck Temperature Statistics

September Temperature

Farmington Airport (9.9 miles)

  • Lowest 4 September, 2026

    72 °F

  • Average September

    82.6 °F

  • Highest 4 September, 2026

    96.1 °F

Climate (2021–2026)

Farmington Airport (9.9 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    57.3 °F

  • Average High 2021–2026

    67.3 °F
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