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

57°·73° high·Breezy·Dry

Race Day Weather

57°at start

76° high

Breezy

Dry

Warming trend, moderate winds

Runners will face a temperature increase from 57°F at the start to a peak of 74°F. Winds will be from the SSW at 13 mph, with gusts up to 24 mph. With humidity at 69% and a dew point of 53°F, it's advisable to pace conservatively and prioritize hydration throughout the race.

Race day forecast available in 40 days

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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

Website

Course Map

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.

Historical Weather

Based on 8 years of data

Avg Temp

76°F

L:61° H:76°

RunScore

Conditions

Rain Freq

13%

1 of 8 yrs

Wind13mph

Dew62°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Sioux Falls Marathon Partly cloudy throughout the day. 2025	54°/80°	-	57°
2024 Sioux Falls Marathon Partly cloudy throughout the day. 2024	75°/82°	-	74°
2023 Sioux Falls Marathon Becoming cloudy in the afternoon. 2023	57°/76°	-	58°
2022 Sioux Falls Marathon Partly cloudy throughout the day. 2022	67°/82°	-	67°
2019 Sioux Falls Marathon Cloudy skies throughout the day with a chance of rain throughout the day. 2019	58°/62°	Light	58°
2018 Sioux Falls Marathon Partly cloudy throughout the day. 2018	55°/70°	-	53°
2017 Sioux Falls Marathon Clearing in the afternoon with rain clearing later. 2017	67°/79°	-	61°
2016 Sioux Falls Marathon Clear conditions throughout the day. 2016	57°/75°	-	53°

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