Metro

Enjoy Sunday’s beautiful weather; heat and rain sweep in on Monday

Boston, MA., 0802/17, Periodic downpours and lightening swept through the Boston area, and the lifeguards at Pleasure Bay had no customers after a downpour so they stayed in the shade. Suzanne Kreiter/Globe staff

Suzanne Kreiter/Globe staff/File

Lifeguards were on duty at Pleasure Bay last week.

Monday is expected to bring a rude interruption to an otherwise pleasant, summery week.

Sunday was largely sunny and dry, with temperatures peaking at 77 degrees. The morning brought wind gusts up to 25 miles per hour, spurring the National Weather Service to issue a small craft advisory for all of the Massachusetts coast until 6 p.m. Sunday -- 25 knots is the threshold for such a warning.

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“Aside from some breezy conditions, very pleasant across the region today,” the National Weather Service tweeted on Sunday morning. “Hopefully you get a chance to enjoy!”

That chance is a relatively small window, as Monday is set to flip the switch to rain and humidity. The chance of rain is likely to increase throughout the day, beginning at 20 percent in the morning and going up to 90 percent by nighttime, with a smattering of fog to boot.

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Glenn Field, a warning coordination meteorologist with the National Weather Service, said the entire Bay State is expected to get wet, with the Boston area totaling around an inch of rain.

“It should be a good soaking rain,” Field said. “We’re figuring most areas will see anywhere from a quarter to three quarters of an inch of rain, but some areas [will see] an inch to an inch and a half.”

Field said the weather service is monitoring the possibility of thunderstorms, although he is mostly expecting a “steady rain.”

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“The south coast, if they do get thunderstorms, could have most of the rain more than anybody,” Field said. “Everybody’s going to get rain.”

However, Field said the rain should be “out of here pretty quickly,” leaving the state by noon on Tuesday and clearing a path for pleasant summer days. Sunshine is set to define the week -- the forecast calls for cloudless skies until a “partly sunny” Friday. High temperatures should hover just around 80 degrees.

The average high for this time of year is 81 degrees, so the coming week’s temperatures are within “a couple degrees of normal,” according to Field.

“Totally beautiful weather,” Field said. “Not too warm, not too cold -- just right.”

Rowan Walrath can be reached at rowan.walrath@globe.com. Follow her on Twitter @rowanwalrath.
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