Temperatures are expected to drop into the 20s Saturday night and stay cooler than normal for the next few days, forecasters said.
The steady and widespread rain blanketing the area during the day Saturday will taper off around midnight, completely stopping at about 2 a.m. Sunday.
"As the rain is ending, a cold front will be coming through," said David Stark, meteorologist in the Upton office of the National Weather Service.
Sunday's high temperature isn't expected to get above the mid 30s, but it will be mostly clear and sunny with 25- to 30-mph winds and gusts up to 40 mph, Stark said.
Through Monday, temperatures will stay in the mid 30s. Forecasters are keeping an eye on a coastal storm that will likely bring rain, and possibly some snow, on Wednesday.
But it is too early to say for sure.
"It could bring an afternoon flurry but nothing widespread," Stark said. "It will likely be too warm for anything other than rain."
While there were unseasonably warm days over the past two months, Saturday night's drop in temperature will make it about 5 to 7 degrees cooler than usual for this time of year.
The normal high temperature for this time of year is 46 degrees and lows are about 31 degrees, Stark said.