Warm Friday Leads to Chilly, Rainy Marathon Monday

Enjoy the warmth while it lasts on Friday because a big change is on the way.

Even with mostly cloudy skies, and a few spotty rain showers on Friday, temperatures will soar into the 60s and even near 70 in spots.

What’s known as a 'backdoor' cold front sweeps through New England on Saturday, which means it comes down from Maine, opposite of the usual direction. It also means cold air will spill through the area, dropping temperatures rather dramatically.

Temperatures on Saturday will only be in the 30s for much of Northern New England, with 40s from Southern New Hampshire into the Merrimack Valley and North Shore. Parts of Vermont, Maine, and New Hampshire will even see some snow showers.

Boston tops out in the 50s before temperatures drop during the day, with mostly cloudy skies and a spot shower.

In southwestern New England, parts of Connecticut will still reach the 60s and 70s before also being impacted by the cold front which sends temperatures downward.

By Sunday all of New England is under the influence of a chilly northeast wind, keeping highs locked in the 30s and 40s. There will continue to be snow showers in Northern New England, with mixed rain and snow showers in Southern New England. Some sleet, or small balls of ice, will also fall.

Milder air tries to battle back in on Monday. Temperatures will slowly rise out of the 40s and into the 50s in Southern New England. But rain will also come back, becoming heavier during the midday and afternoon hours. Winds out of the east-southeast will be gusty, sustained at 10-20 mph.

That will make it the first damp Boston Marathon since 2015, certainly making it unpleasant for spectators and many runners.

That system pulls away on Tuesday, so rain and snow showers will gradually end.

After that much of next week looks to be quieter with highs in the 50s much of the time.

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