The 2026 That Dam Hill Half Marathon has concluded.

That Dam Hill Half Marathon

Race complete
London, ON, Canada · September 19, 2026·
cloudy58°·59° high·Breezy·Dry
8
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That Dam Hill Half Marathon race day weather

cloudy
58°at start
61° high
Breezy
Dry
Your goal
0:00:00

Comfortable temps, moderate wind, rain likely

Mild 58°F temps at gun time mean comfortable early miles without overheating risk. Moderate winds around 13mph may affect pacing on open sections of the course. Rain is likely — waterproof your phone and bib, and consider a disposable poncho for the corral. Moderate humidity at 80% is worth noting for effort level, especially in later miles.

cloudy9
partly-cloudy-night8
partly-cloudy-day8
cloudy8
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cloudy7
cloudy7
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rain7
cloudy7

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About the That Dam Hill Half Marathon

The Half Marathon at That Dam Hill is run in Springbank Park in London, Ontario, on the Saturday of race weekend. Runners start along the park path west of the central parking lot, complete a partial opening loop and then nine laps of a certified 2.3 km loop. The half is timed on the same loop as the marathon and the longer timed ultra races.

Race weekend

Saturday, September 19
8:00 AMMarathon (26.2 mi)
8:00 AMHalf Marathon (13.1 mi)
1:00 PM5K (3.1 mi)
Area Map
Course Map

That Dam Hill Half Marathon FAQ

When is the 2026 That Dam Hill Half Marathon?

The 2026 That Dam Hill Half Marathon will be held on Saturday September 19, 2026.

What will the weather be like for the 2026 That Dam Hill Half Marathon?

The forecast calls for a high of 61°F and a low of 55°F with a 100% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

What is the weather usually like for the That Dam Hill Half Marathon?

Over the 8 years racecast.io has race-day weather for (2019 to 2026), it averaged 54°F at the start and 62°F by a typical finish. Rain fell during race hours in 1 of those years (2020).

What was the hottest That Dam Hill Half Marathon?

Of the 8 years on record, 2024 was the warmest, reaching 72°F during race hours. The coldest start was 2020, at 36°F.

What was the windiest That Dam Hill Half Marathon?

Of the 8 years on record, 2019 was the windiest, with wind averaging 13 mph during race hours. The calmest was 2023, at 1 mph.

That Dam Hill Half Marathon weather history

Based on 8 years of data
Avg Temp
58°F
L:54° H:62°
RunScore
7
Conditions
Rain Freq
13%
1 of 8 yrs
Wind7mph
Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
partly-cloudy-day
58°/59°-
8
2025
partly-cloudy-day
54°/63°-
8
2024
partly-cloudy-day
63°/72°-
5
2023
partly-cloudy-day
48°/61°-
8
2022
cloudy
59°/63°-
6
2021
partly-cloudy-day
61°/65°-
6
2020
rain
36°/51°Light
10
2019
clear-day
58°/64°-
7