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
Warm afternoon, headwind later
Runners will face a gradual temperature rise from 57°F to a peak of 74°F. A headwind at 13 mph will develop, with gusts reaching 24 mph, while humidity sits at a moderate 69%. Runners should adjust their pace as the heat increases, especially in the latter half of the race.
Race day forecast available in 19 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 8% chance of rain.
