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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Current conditions at

Ortonville, Ortonville Muncipal-Martinson Field Airport (KVVV)

Lat: 45.31°NLon: 96.42°WElev: 1099ft.

Fair

66°F

19°C

Humidity 100%
Wind Speed Calm
Barometer 29.99 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 2 Aug 12:55 am CDT
Extended Forecast for

Big Stone City SD

  • Overnight

    Overnight: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 85. Light southeast wind becoming south southeast 12 to 17 mph in the morning. Winds could gust as high as 25 mph.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 64. South southeast wind 13 to 16 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 85. Breezy, with a south southeast wind 14 to 20 mph, with gusts as high as 29 mph.

    High: 85 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 1am, then a chance of showers after 1am. Mostly cloudy, with a low around 57. South southeast wind 10 to 15 mph becoming north northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Mostly sunny, with a high near 74. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 74 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 52. Light and variable wind.

    Low: 52 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76. Calm wind becoming south southwest 5 to 7 mph in the morning.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South wind 3 to 7 mph.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 59. Calm wind.
Sunday
Mostly sunny, with a high near 85. Light southeast wind becoming south southeast 12 to 17 mph in the morning. Winds could gust as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 64. South southeast wind 13 to 16 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 85. Breezy, with a south southeast wind 14 to 20 mph, with gusts as high as 29 mph.
Monday Night
A chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 1am, then a chance of showers after 1am. Mostly cloudy, with a low around 57. South southeast wind 10 to 15 mph becoming north northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
Mostly sunny, with a high near 74. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 52. Light and variable wind.
Wednesday
Mostly sunny, with a high near 76. Calm wind becoming south southwest 5 to 7 mph in the morning.
Wednesday Night
Mostly clear, with a low around 57. South wind 3 to 7 mph.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 61. Chance of precipitation is 20%.
Friday
A slight chance of showers and thunderstorms. Sunny, with a high near 83. Chance of precipitation is 20%.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 20%.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Big Stone City SD
 45.3°N 96.49°W (Elev. 1099 ft)
Last Update:
12:36 am CDT Aug 2, 2026
Forecast Valid:
1am CDT Aug 2, 2026-6pm CDT Aug 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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