American Heroes Run

Longmont, CO, USA · September 12, 2026
partly-cloudy-day71°·93° high·Breezy·Dry
8
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Race Day Weather

partly-cloudy-day
71°at start
94° high
Breezy
Rain possible

Cool start, steady conditions

Runners will face a cool start at 49°F, rising to a comfortable 55°F by race end. Winds will be light at 5 mph from the E, with high humidity at 89%. Given the conditions, maintaining a conservative pace and staying hydrated will be key to a successful race.

partly-cloudy-night8
clear-night8
clear-day8
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day8
clear-day7
clear-day7
partly-cloudy-day7
partly-cloudy-day7
cloudy7

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Race Info

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When is the 2026 American Heroes Run?

The 2026 American Heroes Run will be held on Saturday September 12, 2026.

What will the weather be like for the 2026 American Heroes Run?

The forecast calls for a high of 94°F and a low of 63°F with a 42% chance of rain.

Historical Weather

Based on 5 years of data
Avg Temp
80°F
L:51° H:80°
RunScore
7
Conditions
Rain Freq
20%
1 of 5 yrs
Wind5mph
Dew41°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults

2025 American Heroes Run

Clear conditions throughout the day.

2025
clear-day
45°/78°-
8

2024 American Heroes Run

Clear conditions throughout the day.

2024
clear-day
51°/86°-
8

2023 American Heroes Run

Clear conditions throughout the day.

2023
clear-day
55°/86°-
8

2022 American Heroes Run

Cloudy skies throughout the day with rain.

2022
cloudy
49°/54°Light
9

2021 American Heroes Run

Clear conditions throughout the day.

2021
clear-day
55°/97°-
7

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Free guidesMarathon Fueling Guide·Carb Loading Guide·Race Morning Guide·Race Day Gear Guide·Pacing Strategy Guide·Mental Strategy Guide

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