Bismarck Weather Forecast

    • 72
    • 98

    Isolated Thunderstorms

    • 65
    • 92

    Mostly Sunny

    • 65
    • 89

    Sunny

    • 71
    • 94

    Sunny

    • 72
    • 96

    Mostly Sunny

    • 66
    • 91

    Slight Chance Thunderstorms

Today 5 Sep St. Francois

Sunny. Isolated Showers and Thunderstorms in the afternoon. Hot with Highs in the upper 90s. Northwest Winds around 5 Mph in the Morning, becoming light and variable. Chance of rain 20 percent. Heat index Values up to 107.

Tonight 5 Sep St. Francois

Mostly clear. Isolated Showers and Thunderstorms in the evening. Lows in the lower 70s. Light and variable Winds. Chance of rain 20 percent. Heat index Values up to 102 early in the evening.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Bismarck Temperature Statistics

September Temperature

Farmington Airport (9.9 miles)

  • Lowest 1 September, 2026

    73 °F

  • Average September

    83.8 °F

  • Highest 1 September, 2026

    95 °F

Climate (2021–2026)

Farmington Airport (9.9 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    57.3 °F

  • Average High 2021–2026

    67.4 °F
Get WillyWeather+ to remove ads