That Dam Hill Marathon

London, ON, Canada • September 19, 2026
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Race Day Weather

clear-day
56°
75° high
Light
Dry

Warm afternoon, steady breeze

Runners will face a temperature increase from 56°F at the start to 75°F by the finish, with an average humidity of 71% and a dew point of 57°F. Wind will be a gentle headwind at 8 mph, gusting to 23 mph. Runners should consider adjusting their pace as temperatures rise and ensure adequate hydration throughout the race.

Race day forecast available in 152 days
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Pace Calculator

Distance: 26.2mi
0:00:00
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Pace
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Weather Adj.
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Common Goals:

That Dam Hill Marathon in London, Ontario, offers a certified Boston Marathon Qualifier course that is both spectator-friendly and ideal for setting personal bests. The event features a variety of race options, including a marathon, half marathon, and multiple timed ultra races, all set within the scenic Springbank Park. Organized by dedicated volunteers, the race supports cancer research, with all net proceeds benefiting the Dunn with Cancer charity. Source

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Course Map

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When is the 2026 That Dam Hill Marathon?

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

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

The forecast calls for a high of 75°F and a low of 56°F with a 0% chance of rain.

Historical Weather

Based on 3 years of data
Avg Temp
75°F
L:55° H:75°
RunScore
8
Conditions
Rain Freq
0%
0 of 3 yrs
Wind7mph
Dew51°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore

2025 That Dam Hill Marathon

Partly cloudy throughout the day.

2025
clear-day
54°/73°-
7

2024 That Dam Hill Marathon

Partly cloudy throughout the day with rain clearing later.

2024
partly-cloudy-day
63°/82°-
8

2023 That Dam Hill Marathon

Partly cloudy throughout the day.

2023
clear-day
48°/69°-
8

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