Charles River Marathon
Race Day Weather
Cool conditions, adjust for wind
Runners will face a temperature starting at 45°F and peaking at 52°F, with an average humidity of 64% and a dew point of 35°F. Wind from the NW at 18 mph, gusting to 30 mph, will create a steady headwind throughout. Competitors should consider pacing adjustments to account for wind resistance and stay hydrated as they navigate these conditions.
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Race Info
The Charles River Marathon offers a flat, fast, and USATF-certified 42.2-kilometer course along Boston's scenic Charles River, starting and finishing at Herter Park. Runners complete ten laps on a 2.6-mile loop, with over 49% of finishers qualifying for the Boston Marathon in recent years. This event combines competitive racing with a supportive atmosphere, featuring live DJ music and a focus on fundraising for cancer research.
FAQ
When is the 2026 Charles River Marathon?
Is the Charles River Marathon a Boston Marathon Qualifier?
What will the weather be like for the 2026 Charles River Marathon?
Historical Weather
Temperature History
Range of temperatures during race hours for each year.
Detailed History
| Year | Conditions | Low / High | Rain | Dew Point | Score |
|---|---|---|---|---|---|
2025 |  | 61°/62° | Light | 60° | |
2024 |  | 55°/69° | - | 46° | |
2023 |  | 71°/76° | Light | 71° |