Delaware Marathon

Wilmington, DE, USA · April 18, 2027·
partly-cloudy-day49°·60° high·Light·Dry
9
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Race Day Weather

partly-cloudy-day
49°at start
64° high
Breezy
Dry
Your goal
0:00:00

Cool start, warming up gradually

Runners will face a start temperature of 49°F, rising to 60°F by the finish. A light NNW wind at 9 mph will provide headwinds from miles 2-3, 5-6, 8, and 20-24, while offering tailwinds in miles 4, 10, and 17-19. With moderate humidity at 52%, runners should consider adjusting their pace in the warmer later miles and remain hydrated throughout.

Race day forecast available in 162 days
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Pace Calculator

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Race Plan

Get your personalized Delaware Marathon race plan

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 Delaware Marathon Running Festival is an excellent assembly of races for all ages and skill sets. Runners enjoy the best of Wilmington, from the majestic views along the riverfront and through downtown (which could be considered the financial center of the United States). The marathon is challenging, yet BQ-enabling and includes the scenic Jack Markell Trail. The half covers first 13 miles of the full marathon and the 10K and 5K run on the same day amplifies the race day buzz. All include access to brilliant post-race festivities in a beautiful park setting. Source

Race weekend

Sunday, April 18
7:00 AMMarathon (26.2 mi)
7:00 AMHalf Marathon (13.1 mi)7:00 AM10K (6.2 mi)
7:20 AM5K (3.1 mi)

FAQ

When is the 2027 Delaware Marathon?

The 2027 Delaware Marathon will be held on Sunday April 18, 2027.

Is the Delaware Marathon a Boston Marathon Qualifier?

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

What is the time limit for the Delaware Marathon?

The time limit for the Delaware Marathon is 7 hours.

What will the weather be like for the 2027 Delaware Marathon?

The forecast calls for a high of 67°F and a low of 50°F with a 7% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 22 years of data
Avg Temp
59°F
L:54° H:64°
RunScore
7
Conditions
Rain Freq
18%
4 of 22 yrs
Wind8mph
Dew50°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore
2026
cloudy
51°/55°Light
8
2025
fog
49°/54°-
10
2024
clear-day
40°/47°-
10
2023
clear-day
54°/65°-
7
2022
clear-day
54°/64°-
7
2021
clear-day
42°/63°-
9
2019
cloudy
56°/58°Light
9
2018
cloudy
49°/62°-
7
2017
clear-day
48°/60°-
9
2016
rain
53°/67°Light
7
2015
cloudy
64°/69°-
4
2014
clear-day
61°/73°-
6
2013
partly-cloudy-day
57°/64°-
7
2012
clear-day
58°/73°-
6
2011
cloudy
63°/66°-
5
2010
partly-cloudy-day
57°/66°-
8
2009
rain
55°/62°Light
7
2008
clear-day
55°/64°-
7
2007
clear-day
57°/66°-
7
2006
clear-day
47°/66°-
8
2005
partly-cloudy-day
63°/72°-
5
2004
partly-cloudy-day
66°/72°-
5