Cooler forecast for Boston
Race‑day temperatures for the Boston Marathon are currently projected to run 5 to 15 degrees below normal for mid‑April, according to the Globe’s weather preview. That forecast is being circulated alongside the event guides and could affect race‑day conditions and spectator planning (bostonglobe.com).
Boston Marathon runners are heading toward a cooler-than-usual race day on Monday, April 20, with current forecasts calling for temperatures below a typical mid-April Patriots’ Day. (bostonglobe.com) The Boston Athletic Association said the 130th Boston Marathon will be run on Monday, April 20, 2026, from Hopkinton to Boston, and the organization has already posted its 2026 spectator guide alongside race-week logistics. (baa.org 1) (baa.org 2) The National Weather Service’s Boston forecast page showed the local office updating Boston-area forecasts this week, with daily conditions still subject to change several days out from race morning. (weather.gov 1) (weather.gov 2) Boston’s April climate data helps explain the concern: Logan Airport averaged 56.4 degrees for daytime highs and 36.1 degrees for lows through the first 10 days of April 2026, while marathon-specific forecasts are now circulating as cooler than that baseline. (weather.gov) (bostonglobe.com) Race-day weather shapes more than finish times in Boston because the course runs 26.2 miles through eight cities and towns, and spectators often spend hours outdoors waiting at transit stops, roadside barriers, and the finish area. (baa.org 1) (baa.org 2) The Boston Athletic Association’s spectator guidance already points people to viewing plans, train travel, and street closures, and a colder setup can change what runners wear before the start and how families plan the day in Hopkinton, Wellesley, Newton, and downtown Boston. (baa.org) Forecast uncertainty is normal a week out, and the National Weather Service’s forecast discussions have highlighted shifting fronts and temperature swings across southern New England this month, including recent stretches in the 70s and cooler coastal air. (weather.gov) (weather.gov) For now, the practical takeaway is simple: Boston’s race week is underway, the official guides are out, and Monday’s marathon is trending cooler than a standard April holiday in the city. (baa.org) (bostonglobe.com)
