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
partly-cloudy-day56°·71° high·Breezy·Dry
8
Register

Race Day Weather

partly-cloudy-day
56°at start
75° high
Breezy
Dry

Warm afternoon, moderate wind gusts

Runners will face rising temperatures from 58°F at the start to a peak of 73°F. With average humidity at 78% and wind gusts reaching 33 mph from the SE, pacing adjustments are crucial. Runners should start conservatively and stay hydrated, as moderate rain is possible during the race.

partly-cloudy-night9
partly-cloudy-night9
partly-cloudy-night9
partly-cloudy-night9
partly-cloudy-day9
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day8
cloudy7
cloudy7
cloudy7

Pace Calculator

Distance: 26.2mi
0:00:00
HH:MM:SS
Pace
Weather Adj.
Common Goals:

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.

Race Plan

Get your personalized Sioux Falls Marathon race plan

Weather-adjusted pacing, per-mile terrain splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide — all personalized to your goal and race-day conditions.

Race Conditions
Terrain Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

Race Info

The Sioux Falls Marathon is South Dakota’s premier marathon weekend and features races for all levels of runners: from the Miracle 5K to a USATF certified Full Marathon that is a Boston Qualifying Race. Source

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 75°F and a low of 56°F with a 32% chance of rain.

Historical Weather

Based on 10 years of data
Avg Temp
76°F
L:61° H:76°
RunScore
6
Conditions
Rain Freq
10%
1 of 10 yrs
Wind14mph
Dew61°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
partly-cloudy-night
54°/80°-
8
2024
cloudy
75°/82°-
7
2023
partly-cloudy-day
57°/76°-
8
2022
partly-cloudy-day
67°/82°-
7
2021
partly-cloudy-day
61°/77°-
8
2020
partly-cloudy-day
61°/78°-
7
2019
rain
58°/62°Light
7
2018
partly-cloudy-day
55°/70°-
8
2017
cloudy
67°/79°-
6
2016
clear-night
57°/75°-
6