FORT THOMPSON, SD 57339 Weather Forecast & Current Conditions

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CHAMBERLAIN, SD
Current Weather

4:55 AM CDT JUN 29, 2026
Overcast
Mist
NA
Feels Like: NA
Dewpoint: NA
Rel. Hum.: NA%
Visibility: 1 miles
Wind: ENE at 9 mph
Pressure: 29.53 inches
Last 72 hours

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FORT THOMPSON, SD 57339
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Partly sunny. A slight chance of thunderstorms this morning. Patchy fog this morning. Some thunderstorms may be severe. Highs in the mid 80s. Southeast winds 10 to 15 mph, becoming west 15 to 20 mph with gusts up to 30 mph this afternoon. Chance of rain 20 percent.
TONIGHT
Mostly clear. Less humid with lows in the upper 50s. Southwest winds 15 to 20 mph with gusts up to 30 mph, becoming south 5 to 10 mph after midnight.
TUESDAY
Mostly sunny. Highs in the upper 80s. West winds 5 to 10 mph.
TUESDAY NIGHT
Mostly clear in the evening, then mostly cloudy with showers likely with a chance of thunderstorms after midnight. Lows in the lower 60s. Southeast winds 5 to 10 mph. Chance of rain 60 percent.
WEDNESDAY
Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the upper 80s. South winds 5 to 10 mph, becoming west with gusts up to 20 mph in the afternoon. Chance of rain 50 percent.
WEDNESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s.
THURSDAY
Partly sunny. A chance of showers in the afternoon. Hot with highs around 90. Chance of rain 30 percent.
THURSDAY NIGHT
Thunderstorms likely in the evening, then mostly cloudy with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 60 percent.
FRIDAY
Partly sunny. Highs in the upper 80s.
FRIDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. A 40 percent chance of thunderstorms. Lows in the mid 60s.
INDEPENDENCE DAY
Partly sunny. A slight chance of showers in the morning, then a chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 30 percent.
SATURDAY NIGHT
Partly cloudy. A chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the lower 60s. Chance of rain 50 percent.
SUNDAY
Partly sunny. A slight chance of showers in the afternoon. Highs in the lower 80s. Chance of rain 20 percent.

Visible Weather Satellite
FORT THOMPSON, SD 57339
Infrared Weather Satellite
FORT THOMPSON, SD 57339
NEXRAD Weather Radar
FORT THOMPSON, SD 57339

CHAMBERLAIN, SD 3 hourly weather forecast

weather forecast created  5:00 PM PDT  6/28/2026
Monday
29 JUN 2026
FORT THOMPSON, SD 57339 weather forecast Day 1, 0 hours 1 AM 71° 71° Partly Cloudy 24%
RAIN
<.01 in
0% Thunder
( 25% severe)
E   5 100% 71°
Low 69° FORT THOMPSON, SD 57339 weather forecast Day 1, 3 hours 4 AM 70° 70° Partly Cloudy E   8 100% 70°
High 87° FORT THOMPSON, SD 57339 weather forecast Day 1, 6 hours 7 AM 70° 70° Mostly Cloudy 5%

0% Thunder
( 11% severe)
ENE   9 100% 70°

Decreasing Clouds



FORT THOMPSON, SD 57339 weather forecast Day 1, 9 hours 10 AM 76° 76° Mostly Cloudy SW   10 87% 72°
FORT THOMPSON, SD 57339 weather forecast Day 1, 12 hours 1 PM 80° 83° Mostly Cloudy 12%
RAIN
<.01 in
0% Thunder
( 10% severe)
W   15 69% 69°
FORT THOMPSON, SD 57339 weather forecast Day 1, 15 hours 4 PM 84° 84° Clear WSW   15 44% 60°
FORT THOMPSON, SD 57339 weather forecast Day 1, 18 hours 7 PM 85° 84° Clear 2%

0% Thunder
( 6% severe)
WSW   12 39% 57°
FORT THOMPSON, SD 57339 weather forecast Day 1, 21 hours 10 PM 73° 73° Partly Cloudy SW   7 49% 53°
Tuesday
30 JUN 2026
FORT THOMPSON, SD 57339 weather forecast Day 2, 0 hours 1 AM 68° 68° Clear 3%

0% Thunder
( 2% severe)
SSW   7 53% 50°
Low 59° FORT THOMPSON, SD 57339 weather forecast Day 2, 3 hours 4 AM 64° 64° Partly Cloudy SSW   7 56% 48°
High 89° FORT THOMPSON, SD 57339 weather forecast Day 2, 6 hours 7 AM 62° 62° Partly Cloudy 0%

0% Thunder
( 1% severe)
WSW   6 65% 50°

Clear



FORT THOMPSON, SD 57339 weather forecast Day 2, 9 hours 10 AM 72° 72° Clear W   7 53% 54°
FORT THOMPSON, SD 57339 weather forecast Day 2, 12 hours 1 PM 80° 80° Clear 0%

0% Thunder
( 3% severe)
W   8 38% 52°
FORT THOMPSON, SD 57339 weather forecast Day 2, 15 hours 4 PM 86° 84° Clear WSW   5 30% 51°
FORT THOMPSON, SD 57339 weather forecast Day 2, 18 hours 7 PM 87° 85° Clear 7%

0% Thunder
( 18% severe)
SE   6 32% 54°
FORT THOMPSON, SD 57339 weather forecast Day 2, 21 hours 10 PM 75° 75° Partly Cloudy E   5 55% 58°

CHAMBERLAIN, SD extended weather forecast

Wednesday
1 JUL 2026
Thursday
2 JUL 2026
Friday
3 JUL 2026
Saturday
4 JUL 2026
Sunday
5 JUL 2026
Low 64° Low 65° Low 65° Low 68° Low 65°
High 88° High 91° High 88° High 89° High 90°
FORT THOMPSON, SD 57339 weather forecast Day 3 FORT THOMPSON, SD 57339 weather forecast Day 4 FORT THOMPSON, SD 57339 weather forecast Day 5 FORT THOMPSON, SD 57339 weather forecast Day 6 FORT THOMPSON, SD 57339 weather forecast Day 7
Partly Cloudy
31% Rain
Partly Cloudy
40% Rain
Mostly Cloudy
64% Rain
Mostly Cloudy
39% Rain
Partly Cloudy
28% Rain
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