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Extreme Heat and Tropical Storm Bertha Impacts

Dangerous heat will expand from the Gulf Coast into the Southern Plains and Desert Southwest through week's end. Additional extreme heat impacting the Pacific Northwest will shift to the northern Plains by the weekend. Tropical Storm Bertha is expected to continue to impact portions of the northern Gulf Coast from the western Florida Panhandle to southeastern Louisiana through tonight. Read More >

Current conditions at

Spearfish / Clyde Ice (KSPF)

Lat: 44.48°NLon: 103.78°WElev: 3898ft.

Fair

82°F

28°C

Humidity 48%
Wind Speed SE 18 G 24 mph
Barometer 30.07 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 22 Jul 5:15 pm MDT
Extended Forecast for

Nisland SD

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after midnight. Increasing clouds, with a low around 63. Breezy, with a southeast wind 18 to 23 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 34 mph.

    Low: 63 °F

    Slight Chance
    T-storms and
    Breezy then
    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 9am. Mostly cloudy, with a high near 85. Southeast wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 30%.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. Southeast wind 5 to 11 mph, with gusts as high as 17 mph.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. Light and variable wind becoming northwest 6 to 11 mph in the morning. Winds could gust as high as 22 mph.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 67. Northwest wind 6 to 11 mph becoming southwest in the evening. Winds could gust as high as 20 mph.

    Low: 67 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 105. Light and variable wind becoming southeast 10 to 15 mph in the morning. Winds could gust as high as 25 mph.

    High: 105 °F

    Hot

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 70.

    Low: 70 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny and hot, with a high near 105.

    High: 105 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms, mainly after midnight. Increasing clouds, with a low around 63. Breezy, with a southeast wind 18 to 23 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 34 mph.
Thursday
A chance of showers, with thunderstorms also possible after 9am. Mostly cloudy, with a high near 85. Southeast wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 61. Southeast wind 5 to 11 mph, with gusts as high as 17 mph.
Friday
Sunny and hot, with a high near 100. Light and variable wind becoming northwest 6 to 11 mph in the morning. Winds could gust as high as 22 mph.
Friday Night
Mostly clear, with a low around 67. Northwest wind 6 to 11 mph becoming southwest in the evening. Winds could gust as high as 20 mph.
Saturday
Sunny and hot, with a high near 105. Light and variable wind becoming southeast 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 70.
Sunday
Sunny and hot, with a high near 105.
Sunday Night
Mostly clear, with a low around 68.
Monday
Mostly sunny and hot, with a high near 100.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 96. Breezy.
Tuesday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 66. Breezy.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 96.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Nisland SD
 44.66°N 103.56°W (Elev. 2897 ft)
Last Update:
5:03 pm MDT Jul 22, 2026
Forecast Valid:
5pm MDT Jul 22, 2026-6pm MDT Jul 29, 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