A cool 40°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temps will climb significantly to 58°F by later miles, so expect fading conditions as the race progresses. Moderate winds around 12mph may affect pacing on open sections of the course.

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Distance: 13.1mi

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About the Detroit Free Press International Half Marathon

The International Half Marathon starts on Fort Street in downtown Detroit and crosses the Ambassador Bridge into Windsor, Ontario. Runners return to the United States through the Detroit-Windsor Tunnel, run through Downtown and Midtown, and finish at the foot of Campus Martius.

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Race weekend

Saturday, October 17

8:50 AM5K (3.1 mi)

Sunday, October 18

7:00 AMMarathon (26.2 mi)

7:00 AMInternational Half Marathon (13.1 mi)

10:30 AMMotor City Half Marathon (13.1 mi)

Detroit Free Press International Half Marathon FAQ

When is the 2026 Detroit Free Press International Half Marathon?

The 2026 Detroit Free Press International Half Marathon will be held on Sunday October 18, 2026.

What is the time limit for the Detroit Free Press International Half Marathon?

The time limit for the Detroit Free Press International Half Marathon is 4.75 hours.

What will the weather be like for the 2026 Detroit Free Press International Half Marathon?

The forecast calls for a high of 64°F and a low of 40°F with a 0% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

What is the weather usually like for the Detroit Free Press International Half Marathon?

Over the 28 years racecast.io has race-day weather for (1998 to 2026), it averaged 47°F at the start and 49°F by a typical finish. Rain fell during race hours in 3 of those years (2001, 2004 and 2025).

What was the hottest Detroit Free Press International Half Marathon?

Of the 28 years on record, 2017 was the warmest, reaching 71°F during race hours. The coldest start was 2009, at 31°F.

What was the windiest Detroit Free Press International Half Marathon?

Of the 28 years on record, 2025 was the windiest, with wind averaging 19 mph during race hours. The calmest was 2019, at 0 mph.

Detroit Free Press International Half Marathon weather history

Based on 28 years of data

Avg Temp

47°F

L:46° H:49°

RunScore

Conditions

Rain Freq

11%

3 of 28 yrs

Wind7mph

Dew40°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Detroit Free Press International Half Marathon Clear conditions throughout the day. 2026	40°/44°	-	29°
2025 Detroit Free Press International Half Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2025	63°/65°	Light	62°
2024 Detroit Free Press International Half Marathon Clear conditions throughout the day. 2024	44°/50°	-	39°
2023 Detroit Free Press International Half Marathon Partly cloudy throughout the day with rain. 2023	48°/50°	-	42°
2022 Detroit Free Press International Half Marathon Partly cloudy throughout the day with early morning rain. 2022	46°/48°	-	36°
2021 Detroit Free Press International Half Marathon Partly cloudy throughout the day. 2021	47°/49°	-	41°
2019 Detroit Free Press International Half Marathon Partly cloudy throughout the day. 2019	46°/50°	-	46°
2018 Detroit Free Press International Half Marathon Partly cloudy throughout the day. 2018	36°/36°	-	23°
2017 Detroit Free Press International Half Marathon Partly cloudy throughout the day with rain. 2017	70°/71°	-	66°
2016 Detroit Free Press International Half Marathon Partly cloudy throughout the day with rain in the morning and afternoon. 2016	65°/65°	-	60°
2015 Detroit Free Press International Half Marathon Partly cloudy throughout the day. 2015	35°/37°	-	27°
2014 Detroit Free Press International Half Marathon Partly cloudy throughout the day. 2014	34°/37°	-	31°
2013 Detroit Free Press International Half Marathon Partly cloudy throughout the day with rain. 2013	41°/43°	-	36°
2012 Detroit Free Press International Half Marathon Clear conditions throughout the day. 2012	40°/43°	-	41°
2011 Detroit Free Press International Half Marathon Partly cloudy throughout the day with late afternoon rain. 2011	50°/52°	-	40°
2010 Detroit Free Press International Half Marathon Partly cloudy throughout the day. 2010	49°/50°	-	43°
2009 Detroit Free Press International Half Marathon Partly cloudy throughout the day. 2009	29°/35°	-	25°
2008 Detroit Free Press International Half Marathon Partly cloudy throughout the day. 2008	37°/41°	-	32°
2007 Detroit Free Press International Half Marathon Clear conditions throughout the day. 2007	57°/60°	-	45°
2006 Detroit Free Press International Half Marathon Clear conditions throughout the day. 2006	38°/40°	-	24°
2005 Detroit Free Press International Half Marathon Partly cloudy throughout the day. 2005	37°/39°	-	35°
2004 Detroit Free Press International Half Marathon Partly cloudy throughout the day with rain clearing later. 2004	53°/55°	Light	50°
2003 Detroit Free Press International Half Marathon Partly cloudy throughout the day with early morning rain. 2003	37°/39°	-	33°
2002 Detroit Free Press International Half Marathon Partly cloudy throughout the day. 2002	48°/54°	-	45°
2001 Detroit Free Press International Half Marathon Partly cloudy throughout the day with rain. 2001	56°/58°	Light	52°
2000 Detroit Free Press International Half Marathon Partly cloudy throughout the day with afternoon rain. 2000	56°/59°	-	52°
1999 Detroit Free Press International Half Marathon Becoming cloudy in the afternoon. 1999	39°/43°	-	36°
1998 Detroit Free Press International Half Marathon Clearing in the afternoon. 1998	47°/49°	-	41°