Delaware Marathon

Wilmington, DE, USA • April 19, 2026

Race Day Weather

46°

62° high

Breezy

Dry

Mild temps, slight wind gusts

Runners will face mild temperatures starting at 54°F and peaking at 55°F. Wind will come from the WNW at 8 mph, with gusts reaching 20 mph. With high humidity at 90%, pacing should be conservative to avoid fatigue, and hydration should be prioritized early in the race.

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Pre-raceRace windowPost-race

Pace Calculator

Distance: 26.2mi

Target Finish Time

0:00:00

HH:MM:SS

Pace

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Weather Adj.

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Common Goals:

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

Course Map

FAQ

When is the 2026 Delaware Marathon?

The 2026 Delaware Marathon will be held on Sunday April 19, 2026.

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 6 hours.

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

The forecast calls for a high of 62°F and a low of 46°F with a 19% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 21 years of data

Avg Temp

67°F

L:55° H:68°

RunScore

Conditions

Rain Freq

19%

4 of 21 yrs

Wind12mph

Dew48°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Delaware Marathon Cloudy skies throughout the day. 2025	49°/55°	-	48°
2024 Delaware Marathon Clear conditions throughout the day. 2024	40°/50°	-	27°
2023 Delaware Marathon Partly cloudy throughout the day with early morning rain. 2023	54°/66°	-	45°
2022 Delaware Marathon Clear conditions throughout the day. 2022	54°/72°	-	49°
2021 Delaware Marathon Partly cloudy throughout the day. 2021	42°/65°	-	34°
2019 Delaware Marathon Partly cloudy throughout the day with morning rain. 2019	56°/63°	Light	44°
2018 Delaware Marathon Clearing in the afternoon with late afternoon rain. 2018	49°/67°	-	54°
2017 Delaware Marathon Partly cloudy throughout the day. 2017	48°/69°	-	50°
2016 Delaware Marathon Clearing in the afternoon with morning rain. 2016	53°/69°	Light	47°
2015 Delaware Marathon Partly cloudy throughout the day with afternoon rain. 2015	64°/76°	-	66°
2014 Delaware Marathon Clear conditions throughout the day with early morning rain. 2014	61°/75°	-	51°
2013 Delaware Marathon Clearing in the afternoon with early morning rain. 2013	57°/64°	-	46°
2012 Delaware Marathon Clear conditions throughout the day. 2012	58°/77°	-	55°
2011 Delaware Marathon Partly cloudy throughout the day with rain. 2011	63°/70°	-	65°
2010 Delaware Marathon Partly cloudy throughout the day. 2010	57°/70°	-	44°
2009 Delaware Marathon Partly cloudy throughout the day with rain clearing later. 2009	55°/62°	Light	50°
2008 Delaware Marathon Becoming cloudy in the afternoon with rain. 2008	55°/66°	Light	52°
2007 Delaware Marathon Partly cloudy throughout the day. 2007	57°/71°	-	49°
2006 Delaware Marathon Clear conditions throughout the day. 2006	47°/70°	-	43°
2005 Delaware Marathon Partly cloudy throughout the day with early morning rain. 2005	63°/74°	-	59°
2004 Delaware Marathon Partly cloudy throughout the day with early morning rain. 2004	66°/76°	-	57°