Sioux Falls Marathon on Aug 25, 2024 cancelled to due excessive heat, half marathon and 5K to continue.
Sioux Falls Marathon
Sioux Falls, SD, USA · September 20, 2026
Race Day Weather
60°at start
77° high
Breezy
Dry
Warm finish, adjust pace accordingly
Runners will face temperatures rising from 59°F at the start to a warm 75°F by the end, with average humidity at 71%. A steady wind from the S at 13 mph may provide some relief but could also feel gusty at times. Runners should consider pacing conservatively and prioritize hydration throughout the race.
Race day forecast available in 131 days
Pre-raceRace windowPost-race
Get forecast alerts for Sioux Falls Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
FAQ
When is the 2026 Sioux Falls Marathon?
The 2026 Sioux Falls Marathon will be held on Sunday September 20, 2026.
Is the Sioux Falls Marathon a Boston Marathon Qualifier?
Yes, the Sioux Falls Marathon is an official Boston Marathon qualifier.
What is the time limit for the Sioux Falls Marathon?
The time limit for the Sioux Falls Marathon is 6.5 hours.
What will the weather be like for the 2026 Sioux Falls Marathon?
The forecast calls for a high of 77°F and a low of 59°F with a 0% chance of rain.