Overheating should be the least of worries for marathon runners in Boston onMonday. A chilly, easterly wind reaching 20 to 25 mph whipping in from the coldAtlantic Ocean will confine high temperatures to the mid-40s. Clouds hangingoverhead will begin to spill rain in the afternoon, although the competitionmay draw to a close before any rain begins to fall.Story by AccuWeather.com senior Meteorologist Jim Andrews.