Montana Marathon

Billings, MT, USA · September 20, 2026

50°·65° high·Breezy·Dry

Weather

Race Day Weather

50°at start

68° high

Breezy

Dry

Cool start, warming trend

Runners will face a temperature rise from 50°F at the start to 67°F by the finish. Winds will be light at 9 mph from the W with gusts up to 24 mph. With humidity at 52% and a dew point of 40°F, conditions are favorable, but runners should stay hydrated and monitor their pace as temperatures increase.

Race day forecast available in 105 days

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Distance: 26.2mi

Target Finish Time

0:00:00

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Race Info

Website

Course Map

FAQ

When is the 2026 Montana Marathon?

The 2026 Montana Marathon will be held on Sunday September 20, 2026.

Is the Montana Marathon a Boston Marathon Qualifier?

Yes, the Montana Marathon is an official Boston Marathon qualifier.

What will the weather be like for the 2026 Montana Marathon?

The forecast calls for a high of 75°F and a low of 50°F with a 12% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 12 years of data

Avg Temp

70°F

L:52° H:71°

RunScore

Conditions

Rain Freq

17%

2 of 12 yrs

Wind13mph

Dew41°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Montana Marathon Partly cloudy throughout the day. 2025	65°/81°	-	49°
2024 Montana Marathon Partly cloudy throughout the day with afternoon rain. 2024	44°/51°	Light	35°
2023 Montana Marathon Partly cloudy throughout the day. 2023	55°/81°	-	50°
2022 Montana Marathon Partly cloudy throughout the day. 2022	36°/56°	-	30°
2021 Montana Marathon Partly cloudy throughout the day with afternoon rain. 2021	51°/60°	Light	39°
2020 Montana Marathon Partly cloudy throughout the day. 2020	54°/71°	-	36°
2019 Montana Marathon Partly cloudy throughout the day. 2019	65°/92°	-	44°
2018 Montana Marathon Partly cloudy throughout the day. 2018	52°/71°	-	47°
2017 Montana Marathon Partly cloudy throughout the day. 2017	40°/58°	-	39°
2016 Montana Marathon Partly cloudy throughout the day with late afternoon rain. 2016	62°/79°	-	41°
2015 Montana Marathon Becoming cloudy in the afternoon. 2015	54°/80°	-	34°
2014 Montana Marathon Clear conditions throughout the day. 2014	47°/72°	-	43°

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