National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England. Read More >

Current conditions at

Bismarck, Bismarck Municipal Airport (KBIS)

Lat: 46.78°NLon: 100.76°WElev: 1677ft.

Fair

81°F

27°C

Humidity 47%
Wind Speed E 7 mph
Barometer 29.83 in (1008.8 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 29 Jul 10:52 pm CDT
Extended Forecast for

Bismarck ND

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 67. Breezy, with a southeast wind 17 to 22 mph becoming east 6 to 11 mph after midnight. Winds could gust as high as 34 mph.

    Low: 67 °F

    Chance
    Showers and
    Breezy

  • Thursday

    Thursday: Showers and thunderstorms likely before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 84. Southeast wind 5 to 9 mph becoming north in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms before 9pm. Some of the storms could produce heavy rainfall. Mostly cloudy, then gradually becoming mostly clear, with a low around 60. North wind 5 to 9 mph. New precipitation amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Heavy Rain
    then Partly
    Cloudy

  • Friday

    Friday: Sunny, with a high near 89. Light and variable wind becoming east around 6 mph in the afternoon.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. South wind 6 to 8 mph.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 94. South wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 94 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 65. South wind around 14 mph, with gusts as high as 24 mph.

    Low: 65 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 99. Breezy, with a south wind 14 to 22 mph, with gusts as high as 36 mph.

    High: 99 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms after 1am. Mostly clear, with a low around 64. Breezy, with a south wind 16 to 21 mph becoming northeast 9 to 14 mph after midnight. Winds could gust as high as 33 mph.

    Low: 64 °F

    Mostly Clear
    and Breezy
    then Chance
    T-storms

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 67. Breezy, with a southeast wind 17 to 22 mph becoming east 6 to 11 mph after midnight. Winds could gust as high as 34 mph.
Thursday
Showers and thunderstorms likely before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 84. Southeast wind 5 to 9 mph becoming north in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 40 percent chance of showers and thunderstorms before 9pm. Some of the storms could produce heavy rainfall. Mostly cloudy, then gradually becoming mostly clear, with a low around 60. North wind 5 to 9 mph. New precipitation amounts between a quarter and half of an inch possible.
Friday
Sunny, with a high near 89. Light and variable wind becoming east around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 61. South wind 6 to 8 mph.
Saturday
Sunny and hot, with a high near 94. South wind 6 to 14 mph, with gusts as high as 23 mph.
Saturday Night
Clear, with a low around 65. South wind around 14 mph, with gusts as high as 24 mph.
Sunday
Sunny and hot, with a high near 99. Breezy, with a south wind 14 to 22 mph, with gusts as high as 36 mph.
Sunday Night
A chance of showers and thunderstorms after 1am. Mostly clear, with a low around 64. Breezy, with a south wind 16 to 21 mph becoming northeast 9 to 14 mph after midnight. Winds could gust as high as 33 mph.
Monday
Mostly sunny, with a high near 85. Breezy, with a north wind 16 to 22 mph, with gusts as high as 31 mph.
Monday Night
Mostly clear, with a low around 53. Breezy, with a north wind 17 to 22 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 31 mph.
Tuesday
Mostly sunny, with a high near 80. Northwest wind 5 to 8 mph.
Tuesday Night
Mostly clear, with a low around 54. Northwest wind 5 to 7 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bismarck ND
 46.81°N 100.8°W
Last Update:
10:36 pm CDT Jul 29, 2026
Forecast Valid:
11pm CDT Jul 29, 2026-6pm CDT Aug 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation