Temperatures will be pretty steady in the mid 50s through the day. Monday night skies will briefly clear and temperatures will fall into the upper 30s. Patchy fog is possible overnight.

A few showers are expected later at night. TUESDAY (EARTH DAY): Spotty showers exit very early in the morning. It's breezy and warmer with skies turning mostly sunny, high 79. WEDNESDAY ...

At the finish line in Boston, it will range from the mid 50s to 60 degrees. The day will be dry with calm wind and plenty of sunshine, so pretty nice for spectators. Clouds will increase later today ...