Overview

• Runners began the race in Hopkinton at 9:06 a.m. with temperatures starting in the upper 30s to low 40s under mostly sunny skies.
• Temperatures are expected to steadily rise to the mid-50s by noon and upper 50s to low 60s by mid-afternoon, with localized peaks of 62–63°F between Framingham and Brookline.
• Afternoon cloud cover is anticipated to moderate temperatures, reducing the risk of heat-related illnesses that affected nearly 9% of runners last year.
• Wind speeds are forecast to remain under 10 mph throughout the course, with minimal impact on runners, though a slight onshore seabreeze may create a headwind near the finish line.
• A quick evening shower is possible after the course closes, but the majority of the day is expected to remain dry and comfortable.