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

Tropical Storm Edouard to Impact the Northwest Gulf Coast; Heat Expands Eastward

Tropical Storm Edouard will bring tropical storm to hurricane conditions, heavy rainfall, flash and some river flooding, and storm surge to portions of Upper Texas and southwestern Louisiana coasts into Wednesday. Severe thunderstorms are possible in the Central Plains and Mid-Atlantic. Hot and humid conditions will expand from the Central Plains into the Ohio Valley and Mid-Atlantic. Read More >

Hazardous Weather Conditions

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Rain

73°F

23°C

Humidity 92%
Wind Speed NW 7 mph
Barometer 30.03 in
Dewpoint 71°F (22°C)
Visibility 7.00 mi
Last update 1 Sep 2:35 pm CDT
Extended Forecast for

Oacoma SD

  • This Afternoon

    This Afternoon: Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a steady temperature around 76. East wind around 7 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 60. East northeast wind 5 to 9 mph becoming light and variable after midnight. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 60 °F

    Heavy Rain
    then Partly
    Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 86. Light and variable wind becoming southeast 5 to 9 mph in the morning.

    High: 86 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms between midnight and 1am. Mostly clear, with a low around 67. East southeast wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 67 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 93. Light and variable wind becoming south southwest around 6 mph in the morning.

    High: 93 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. East southeast wind 3 to 6 mph.

    Low: 67 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 94. Light southeast wind increasing to 9 to 14 mph in the afternoon. Winds could gust as high as 22 mph.

    High: 94 °F

    Hot

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms. Mostly clear, with a low around 71. South southeast wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 94. South wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 94 °F

    Hot

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a steady temperature around 76. East wind around 7 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 60. East northeast wind 5 to 9 mph becoming light and variable after midnight. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 86. Light and variable wind becoming southeast 5 to 9 mph in the morning.
Wednesday Night
A slight chance of showers and thunderstorms between midnight and 1am. Mostly clear, with a low around 67. East southeast wind 5 to 10 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny and hot, with a high near 93. Light and variable wind becoming south southwest around 6 mph in the morning.
Thursday Night
Mostly clear, with a low around 67. East southeast wind 3 to 6 mph.
Friday
Sunny and hot, with a high near 94. Light southeast wind increasing to 9 to 14 mph in the afternoon. Winds could gust as high as 22 mph.
Friday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 71. South southeast wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny and hot, with a high near 94. South wind 6 to 11 mph, with gusts as high as 20 mph.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
Sunday
A slight chance of showers. Partly sunny, with a high near 89. Chance of precipitation is 20%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Labor Day
A slight chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Oacoma SD
 43.8°N 99.39°W (Elev. 1355 ft)
Last Update:
2:06 pm CDT Sep 1, 2026
Forecast Valid:
2pm CDT Sep 1, 2026-6pm CDT Sep 7, 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