Weather forecast for: Fort Thompson SD
Last Update: 7:21 am CDT Sep 20, 2026
Today: Showers likely, mainly after 1pm. Patchy fog before 1pm, then patchy fog after 2pm. Otherwise, cloudy, with a high near 62. East wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight: Showers. Patchy fog. Low around 50. East northeast wind around 9 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Monday: A chance of showers between 10am and 2pm. Patchy fog between 10am and 11am. Otherwise, mostly cloudy, with a high near 60. East northeast wind 8 to 10 mph. Chance of precipitation is 40%.
Monday Night: Mostly cloudy, with a low around 44. East wind 6 to 8 mph.
Tuesday: Partly sunny, with a high near 63. Southeast wind 7 to 16 mph, with gusts as high as 24 mph.
Tuesday Night: Partly cloudy, with a low around 47. Southeast wind 13 to 15 mph, with gusts as high as 23 mph.
Wednesday: A slight chance of showers after 1pm. Partly sunny, with a high near 67. Breezy, with a south southeast wind 16 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Wednesday Night: A chance of showers. Mostly cloudy, with a low around 51. Southeast wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Thursday: Partly sunny, with a high near 74. South southeast wind 9 to 14 mph.
Thursday Night: Partly cloudy, with a low around 52.
Friday: Partly sunny, with a high near 74.
Friday Night: Mostly cloudy, with a low around 55.
Saturday: Partly sunny, with a high near 75.
WeatherWorld.com
