Live Weather & Forecast

Weather in Fort Thompson

South Dakota, United States · Real-time conditions & 3-day outlook

Flag of United States
Overcast
14°C
Feels like 14°C
57°F / Feels 57°F
Overcast
Fort Thompson, South Dakota
🌙 Nighttime
Updated: 2026-04-13 03:45
💧
Humidity
59%
💨
Wind
6.1 km/h NE
🌬️
Wind Gust
12.9 km/h
🌡️
Pressure
1007 mb
👁️
Visibility
16 km
☀️
UV Index
0 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
100%
💦
Dew Point
3.2°C
🌐
Wind Degree
55°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
167.9 μg/m³
NO₂
7.5 μg/m³
O₃
44 μg/m³
SO₂
1.1 μg/m³
PM 2.5
8.1 μg/m³
PM 10
10.4 μg/m³

Weather Alerts 1

Met · Severe · Expected
Red Flag Warning issued April 12 at 6:54PM CDT until April 13 at 8:00PM CDT by NWS Aberdeen SD

...RED FLAG WARNING WILL EXPIRE AT 7 PM CDT /6 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota on Monday, Stanley, Jones and Lyman. * WINDS...Northeast 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 16 percent. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control...

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

Effective: 2026-04-12T18:54:00-05:00  ·  Expires: 2026-04-13T03:00:00-05:00

Today's Hourly Forecast

24-hour breakdown for Fort Thompson, South Dakota

12 AM
Clear
15°
Clear
💧 46% 💨 8.3 km/h
1 AM
Clear
14°
Clear
💧 47% 💨 9 km/h
2 AM
Clear
13°
Clear
💧 48% 💨 6.1 km/h
3 AM
Overcast
14°
Overcast
💧 59% 💨 6.1 km/h
4 AM
Clear
11°
Clear
💧 78% 💨 6.1 km/h
5 AM
Clear
10°
Clear
💧 86% 💨 12.6 km/h
6 AM
Cloudy
11°
Cloudy
💧 96% 💨 12.2 km/h
7 AM
Sunny
11°
Sunny
💧 93% 💨 9 km/h
8 AM
Sunny
12°
Sunny
💧 90% 💨 6.1 km/h
9 AM
Sunny
13°
Sunny
💧 83% 💨 5.8 km/h
10 AM
Sunny
14°
Sunny
💧 76% 💨 2.9 km/h
11 AM
Sunny
16°
Sunny
💧 66% 💨 3.2 km/h
12 PM
Sunny
18°
Sunny
💧 57% 💨 10.8 km/h
1 PM
Sunny
20°
Sunny
💧 49% 💨 13.7 km/h
2 PM
Sunny
22°
Sunny
💧 44% 💨 14.8 km/h
3 PM
Sunny
23°
Sunny
💧 42% 💨 8.3 km/h
4 PM
Sunny
23°
Sunny
💧 40% 💨 12.2 km/h
5 PM
Sunny
24°
Sunny
💧 40% 💨 32.8 km/h
6 PM
Sunny
25°
Sunny
💧 50% 💨 28.1 km/h
7 PM
Sunny
19°
Sunny
💧 16% 💨 30.2 km/h
8 PM
Sunny
15°
Sunny
💧 66% 💨 19.4 km/h
9 PM
Clear
16°
Clear
💧 73% 💨 13.7 km/h
10 PM
Clear
12°
Clear
💧 59% 💨 30.6 km/h
11 PM
Clear
10°
Clear
💧 82% 💨 21.6 km/h

3-Day Forecast

Daily overview for Fort Thompson, South Dakota

Today
Sunny
Sunny
24° / 8°
🌧️ 0% chance of rain
💧 Avg. humidity: 62%
💨 Max wind: 32.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:57 AM
🌇 Sunset: 08:19 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Overcast
Overcast
20° / 6°
🌧️ 0% chance of rain
💧 Avg. humidity: 65%
💨 Max wind: 18.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:55 AM
🌇 Sunset: 08:20 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Sunny
Sunny
25° / 7°
🌧️ 0% chance of rain
💧 Avg. humidity: 53%
💨 Max wind: 13.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:54 AM
🌇 Sunset: 08:21 PM
🌙 Waning Crescent
🌑 Moon: 8% lit

Best Time to Visit Fort Thompson

Plan your trip to Fort Thompson, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Fort Thompson 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Fort Thompson?
Current conditions in Fort Thompson: Overcast, temperature 14°C, humidity 59%.
What is the best time to visit Fort Thompson?
The best time to visit Fort Thompson is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Fort Thompson?
Fort Thompson is located at approximately 44.1° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Fort Thompson?
The wettest period in Fort Thompson is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Fort Thompson?
For visits to Fort Thompson during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Fort Thompson in?
Fort Thompson is located in United States, in the state of South Dakota.
What are the public holidays in Fort Thompson in 2026?
View the 2026 public holidays for Fort Thompson on our Holidays page.
What are the GPS coordinates used for the weather forecast in Fort Thompson?
The weather forecast for Fort Thompson uses coordinates 44.0686, -99.4379.