London OH Marathon

London, OH, USA · April 17, 2027·
partly-cloudy-day45°·56° high·Breezy·Dry
9
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Race Day Weather

partly-cloudy-day
45°at start
61° high
Breezy
Dry
Your goal
0:00:00

Cool morning, steady warming trend

Runners will face a temperature rise from 45°F at the start to 56°F by the finish, with average humidity around 61%. Wind speeds will be light at 11 mph from the WSW, creating a mixed effect throughout the course. As temperatures increase on later laps, runners should consider pacing conservatively and staying hydrated to maintain performance.

Race day forecast available in 149 days
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Pace Calculator

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Race Plan

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A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

Race Info

The London OH Marathon is held in London, Ohio, with the start and finish at Merri-Mac Park. The USATF-certified marathon and half marathon course runs along a flat, tree-lined route toward Darby Creek Metro Park. The race weekend also includes a 5K. The marathon is a Boston Marathon qualifying race.

Race weekend

Saturday, April 17
7:00 AMMarathon (26.2 mi)
7:00 AMHalf Marathon (13.1 mi)
7:15 AM5K (3.1 mi)

FAQ

When is the 2027 London OH Marathon?

The 2027 London OH Marathon will be held on Saturday April 17, 2027.

Is the London OH Marathon a Boston Marathon Qualifier?

Yes, the London OH Marathon is an official Boston Marathon qualifier.

What is the time limit for the London OH Marathon?

The time limit for the London OH Marathon is 5 hours.

What will the weather be like for the 2027 London OH Marathon?

The forecast calls for a high of 66°F and a low of 46°F with a 10% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 5 years of data
Avg Temp
47°F
L:43° H:53°
RunScore
9
Conditions
Rain Freq
20%
1 of 5 yrs
Wind11mph
Dew38°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
clear-night
41°/50°-
9
2025
clear-night
32°/45°-
10
2024
clear-day
41°/50°-
9
2023
partly-cloudy-day
57°/70°-
7
2021
rain
45°/48°Light
10