What is today's weather forecast for Fort Thompson, SD?

Today's forecast for Fort Thompson shows a low of 11 degrees Fahrenheit. Mostly cloudy, with a low around 11.

What is the 7-day weather forecast for Fort Thompson, SD?

The 7-day forecast for Fort Thompson shows highs from 8 to 50 degrees and lows from -4 to 26 degrees Fahrenheit. Expect precipitation on 5 days with chances of 20% or higher.

Will it rain in Fort Thompson, SD this week?

Yes, rain is possible in Fort Thompson this week. Precipitation chances: Tuesday (20% chance), Wednesday (50% chance), Thursday (30% chance), Friday (20% chance), Saturday (20% chance).

How accurate is the Fort Thompson weather forecast?

WeatherForYou provides highly accurate Fort Thompson forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Fort Thompson, SD Weather Forecast and Current Conditions

WEATHER ALERTS - High Wind Watch

Current Conditions

Switch to Metric Units

20°F
Feels Like 11°F

Humidity 62% Dew Point 9°F Wind NNW 7 MPH Gusts 10 Barometer 29.84 in.

Solar Rad 17 w/m²

Report from a personal weather station 18.3 mi. SSE of central Fort Thompson
at 5:37 PM Sun, Dec 7, 2025

Point Forecast at a Glance

SunDec 7

MonDec 8

TueDec 9

20%

WedDec 10

ThuDec 11

30%

FriDec 12

-4

SatDec 13

20%

-1

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

High temperatures start near 39°F, reaching 50°F before cooling to 8°F, then recovering to 11°F by week's end. Unsettled weather expected with snow likely on at least 5 days.

Climate Context

This week's forecast shows temperatures running 6°F below the historical average for December. Normal highs for this period are around 32°F with lows around 11°F.

This Date in Weather History

1740 - In early December two weeks of mild and rainy weather culminated in the worst flood in fifty years in the Lower Connecticut River Valley. The Merrimack River swelled to its highest level, and in Maine the raging waters swept away mills, carried off bridges, and ruined highways.

Fort Thompson, SD 7 Day Weather Forecast Details

Sunday Dec 7

Night: Mostly cloudy, with a low around 11. Southeast wind 9 to 14 mph becoming light east southeast after midnight.

Monday Dec 8

Day: Mostly cloudy, then gradually becoming sunny, with a high near 39. East southeast wind 5 to 13 mph becoming west in the afternoon. Winds could gust as high as 23 mph.

Night: Mostly cloudy, with a low around 26. West northwest wind 7 to 13 mph becoming south southwest after midnight. Winds could gust as high as 22 mph.

Tuesday Dec 9

Day: A slight chance of snow before 9am, then a slight chance of rain. Mostly cloudy, with a high near 50. Breezy, with a south wind 7 to 12 mph becoming west northwest 21 to 26 mph in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 20%.

Night: Partly cloudy, with a low around 21. Blustery, with a northwest wind 24 to 29 mph decreasing to 16 to 21 mph after midnight. Winds could gust as high as 45 mph.

Wednesday Dec 10

Day: Partly sunny, with a high near 29. Northwest wind 8 to 15 mph becoming east in the afternoon. Winds could gust as high as 24 mph.

Night: A chance of snow. Cloudy, with a low around 14. East wind around 11 mph. Chance of precipitation is 50%.

Thursday Dec 11

Day: A chance of snow, mainly before noon. Mostly cloudy, with a high near 24. North northwest wind 11 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

Night: A slight chance of snow. Mostly cloudy, with a low around 0. North northwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

Friday Dec 12

Day: Partly sunny and cold, with a high near 8.

Night: A slight chance of snow. Mostly cloudy, with a low around -4. Chance of precipitation is 20%.

Saturday Dec 13

Day: A slight chance of snow. Mostly cloudy, with a high near 11. Chance of precipitation is 20%.

Night: Mostly cloudy, with a low around -1.

Sunday Dec 14

Day: Partly sunny, with a high near 22.

About Fort Thompson, SD

Fort Thompson (Lakota/ Dakota: Čhúŋkičakse) is a census-designated place (CDP) in Buffalo County, South Dakota, United States. The population was 1,282 at the 2010 census, making it the largest settlement on the Crow Creek Reservation. Fort Thompson was named in honor of Clark W. Thompson, superintendent of Indian Affairs.

Content from Wikipedia, licensed under CC BY-SA 3.0.

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Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

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