After setting a record low of 44 degrees on Tuesday morning Boston starts off several degrees above that to start off the day Wednesday. Most of the western and northern suburbs have dipped into the low 40s with a few spotty upper 30s in some inland valleys. A few area temperatures at 6 am this morning: Beverly 42 degrees, Lawrence 44, Boston 53, Saugus 41, Bedford 38, Amesbury 42 and Rowley 41.
High pressure remains in control on Wednesday and after a chilly start to the day temperatures do rebound into the upper 60s to low 70s in the afternoon. It will be another bright and sunny day, so overall a real nice day to be outdoors. Winds will go around to the southwest, less than 10 mph, bringing in the milder temperatures through the afternoon hours. Although another clear night follows Wednesday night the mercury does not fall as low as previous nights, with lows mainly in the 40s to about 50 on the coast. Light southwest winds overnight.
Thursday through Saturday present more spectacular weather in thanks to the dominance of high pressure. Clear nights and sunny days will be the rule through the period with a continued moderating trend that brings afternoon highs well into the 70s, overnight lows in the 50s both Thursday and Friday nights.
Clouds do increase late Saturday and especially Saturday night as a cold front approaches. We could see a period of showers very late at night and into Sunday as the front moves through eastern Massachusetts at that time. Milder lows Saturday night in the low 60s, slightly cooler highs on Sunday, hovering around 70 degrees.
Speaking of Sunday the autumnal equinox officially takes place late in the afternoon, meaning that Summer ends and Autumn begins.