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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Pierre, Pierre Regional Airport (KPIR)

Lat: 44.38°NLon: 100.29°WElev: 1742ft.

A Few Clouds

68°F

20°C

Humidity 90%
Wind Speed E 12 mph
Barometer 29.85 in (1009.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 17 Aug 8:53 am CDT
Extended Forecast for

16 Miles WSW Fort Pierre SD

  • Today

    Today: A chance of showers and thunderstorms, mainly before 10am. Mostly cloudy early, then becoming sunny and hot, with a high near 94. Heat index values as high as 101. Northeast wind 5 to 9 mph becoming northwest in the morning. Chance of precipitation is 30%.

    High: 94 °F

    Chance
    T-storms then
    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 68. North wind 5 to 10 mph becoming light north northeast after midnight.

    Low: 68 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny and hot, with a high near 94. Light north northeast wind becoming east northeast 5 to 9 mph in the morning.

    High: 94 °F

    Hot

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66. East wind 5 to 10 mph. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Sunny and hot, with a high near 95. East southeast wind 5 to 10 mph.

    High: 95 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. East southeast wind 6 to 11 mph.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 97. South southeast wind 6 to 15 mph.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69. Southeast wind 11 to 16 mph.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101. South wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 101 °F

    Hot

Detailed Forecast

Today
A chance of showers and thunderstorms, mainly before 10am. Mostly cloudy early, then becoming sunny and hot, with a high near 94. Heat index values as high as 101. Northeast wind 5 to 9 mph becoming northwest in the morning. Chance of precipitation is 30%.
Tonight
Partly cloudy, with a low around 68. North wind 5 to 10 mph becoming light north northeast after midnight.
Monday
Mostly sunny and hot, with a high near 94. Light north northeast wind becoming east northeast 5 to 9 mph in the morning.
Monday Night
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66. East wind 5 to 10 mph. Chance of precipitation is 30%.
Tuesday
Sunny and hot, with a high near 95. East southeast wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 66. East southeast wind 6 to 11 mph.
Wednesday
Sunny and hot, with a high near 97. South southeast wind 6 to 15 mph.
Wednesday Night
Mostly clear, with a low around 69. Southeast wind 11 to 16 mph.
Thursday
Sunny and hot, with a high near 101. South wind 10 to 14 mph, with gusts as high as 23 mph.
Thursday Night
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Friday
A slight chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 20%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 59. Chance of precipitation is 30%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles WSW Fort Pierre SD
 44.23°N 100.67°W (Elev. 1572 ft)
Last Update:
9:17 am CDT Aug 17, 2025
Forecast Valid:
9am CDT Aug 17, 2025-6pm CDT Aug 23, 2025
 
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