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
57°at start
76° high
Breezy
Dry
Warming trend, moderate wind conditions
Runners will face a steady temperature increase from 57°F to 74°F, with average humidity at 69% and a dew point of 53°F. Wind will be out of the SSW at 13 mph, potentially creating a headwind during parts of the race. Runners should consider adjusting their pace as temperatures rise and stay hydrated throughout.
Race day forecast available in 110 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 54°F with a 9% chance of rain.
