Boston Marathon 2026: Weather Forecast and What to Expect

Cool and Dry:: Marathon Monday is forecasted to be dry with decreasing clouds and sunshine.

Temperatures:: Runners can expect temperatures in the upper 30s to low 40s at the start in Hopkinton, gradually rising to the upper 40s or around 50 degrees along the route to Boston.

Wind Chill:: Winds could be pushing 10 to 20 mph, making wind chills feel brisk, especially for spectators. It will likely feel like the mid-30s in the morning and low 40s in the afternoon.

Tailwind:: A northwesterly or westerly wind flow could provide a beneficial tailwind for runners.

Sunday Rain:: Before Marathon Monday, expect steady rain throughout Sunday, with potential for wet snow in higher elevations.

Morning: Expect temperatures in the upper 30s to low 40s at the start. Dress in layers that can be removed as the race progresses.

Afternoon: Temperatures will gradually rise to the upper 40s or around 50 degrees.

Wind: A potential tailwind could aid runners, but be prepared for breezy conditions.

All Day: Dress warmly in layers, as wind chills will make it feel significantly colder than the actual temperature.

Morning: Expect wind chills in the mid-30s.

Afternoon: Wind chills in the low 40s.

The average daily high over the past 10 Boston Marathons has been 61 degrees.

The coldest marathon day since 2000 was 43 degrees.

Runners:

Wear moisture-wicking clothing to stay dry.

Consider wearing gloves and a hat at the start.

Adjust your pacing strategy based on the wind conditions.

Spectators:

Dress in multiple layers to adjust to changing temperatures.

Bring blankets and warm drinks.

Be prepared for breezy conditions and potential wind chills.

Runners: Especially those sensitive to cold or wind, or those aiming for personal bests.

Spectators: Those planning to spend many hours along the marathon route.

Q: What will the weather be like on Marathon Monday?

Q: Will there be rain on Marathon Monday?

Q: What should spectators wear?