Marathon de Granby
Race Day Weather
Cool start — fast day potential, warming through the race
A cool 49°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temperatures rising to 62°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. Moderate humidity at 73% is worth noting for effort level, especially in later miles.
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Race Info
The Marathon Sun Life de Granby runs each October in Granby, Quebec, starting and finishing at Parc Daniel-Johnson. The course passes through downtown Granby and along Lac Boivin, with marathon finishers continuing into Parc national de la Yamaska. It is a Boston Marathon and New York City Marathon qualifier. The 2025 edition drew about 6,000 participants across six distances, up from roughly 4,400 the year before.
FAQ
When is the 2026 Marathon de Granby?
Is the Marathon de Granby a Boston Marathon Qualifier?
What will the weather be like for the 2026 Marathon de Granby?
Historical Weather
Temperature History
Range of temperatures during race hours for each year.
Detailed History
| Year | Conditions | Low / High | Rain | Dew Point | Score |
|---|---|---|---|---|---|
2025 |  | 67°/86° | - | 54° | |
2024 |  | 50°/65° | Light | 46° | |
2023 | | 62°/76° | - | 57° | |
2022 | | 42°/53° | - | 31° | |
2021 | | 49°/57° | - | 44° | |
2019 |  | 49°/58° | - | 46° |