Runners, volunteers and spectators are already eyeing the sky ahead of the 130th Boston Marathon, which lands on Patriots' Day this year, Monday, April 20. Local forecasters are calling out April's trademark mood swings: chilly, layer-heavy mornings in Hopkinton that give way to milder, often sunnier finishes near Boylston Street. The early chatter is a reminder that this race has seen just about everything, from snow squalls to sweltering heat, over its long and storied history, as reported by the Boston Athletic Association.
Early Forecast And Averages
According to the Boston Athletic Association, the 130th Boston Marathon is set for Monday, April 20. As reported by WCVB, StormTeam 5's early look leans on April climate normals: an average high near 58°F, an average low near 43°F, monthly precipitation around 3.63 inches and monthly snowfall roughly 1.6 inches. Meteorologists plan to keep refreshing the outlook as race day gets closer. Those numbers are handy for mapping out long training runs and dialing in race gear, but they are not a stand-in for the detailed, day-of forecast that will drive final decisions.
A Marathon Of Weather Extremes
The Boston course has a reputation for being as unpredictable as Heartbreak Hill. The race has seen snow in 1907, 1908, 1925, 1961 and 1967, driving rain in 1970, 2007, 2015 and 2018, and brutal heat, including a 100°F reading in 1905 and stretches near 96°F in 1976, as detailed by John Hancock. With a record like that, race planners, medical teams and running crews treat every year as a choose-your-own-weather adventure and prepare for just about every scenario.
What Runners Should Do Now
With six weeks to go, runners are being urged to keep their training plans flexible: rotate through layers on long runs, rehearse drop-bag strategies and adjust hydration for both warmer and cooler conditions. Local forecasters note that April's usual pattern favors cool starts and mild afternoons, so light, removable layers are the name of the game, along with a specific plan for on-course cooling and hydration, per WCVB.
StormTeam 5 and the Boston Athletic Association are expected to post updated, day-by-day forecasts and race advisories as weather models tighten up closer to April 20. In the final days before Marathon Monday, runners are being reminded to rely on official race channels and trusted local forecasts before making any last-minute calls on gear or pacing.
