Extreme heat could break records with 90s forecast on Sunday

By Terry Eliasen, Meteorologist, WBZ-TV Executive Weather Producer

BOSTON — Graduations, proms, weddings, Little League games — there’s a LOT going on this weekend. For those who circled this weekend on the calendar weeks or months ago, I guess you were thinking, “just please don’t rain” or “please give me a hot day and not a cloudy day in the 50s”.

It probably wasn’t on your list of worries – 95-100 degree heat.

Well, here we are. Not only will we challenge daily high temperature records on Sunday, but we will likely be close to all-time highs for the month of May as well! This record of 97 degrees was set 152 years ago on May 26, 1880. I’m pretty sure no one reading this blog can say they remember it!

Let’s take a closer look at Sunday, where it can be hottest and where you can go to relieve yourself.


With a higher “launch pad”, temperatures will rise much faster than Saturday. We will cross the 90 degree threshold around or before noon in many areas.

With almost full sun and southwesterly winds pumping out the heat, we have the potential to reach the upper 90s in most of Middlesex, Essex, Suffolk and Norfolk counties as well as most of southern New Hampshire .


Boston CBS Chart

Records will fall early in the day on Sunday and as long as the southwest wind direction holds, Boston could challenge the all-time high of 97 degrees for the month of May. I wouldn’t be shocked to see a few towns in the Merrimack Valley report 100 degrees on Sunday afternoon.


Boston CBS Chart

A reminder – it’s never a good idea to leave anyone, people or pets, in a locked car in this kind of heat, even for a few minutes.

Again, relief from the heat can be found along the South Coast, Cape Cod and the Islands. The southwest wind direction will keep temperatures in the 60s and 70s much like Saturday.




A cold front will approach from the west. You’re probably thinking that, given all the heat and humidity, we could be in for some loud thunderstorms. However, at this point it looks like most of us will experience a dramatic change in air mass and not even get a drop of rain. There just isn’t much support for severe weather (locally) Sunday night or early Monday. It will certainly remain warm enough for the first half of the night, but you will feel a huge change when you wake up on Monday. Dew points will fall into the 40s and temperatures will return to more seasonal levels.


It looks a bit more like what you’d expect at the end of May. Maybe a little above average (in the 70s), through Wednesday with no major weather concerns. We may be back in the 80s briefly before a cold front and rain later in the week. As for Memorial Day weekend, no major heat signals yet. The odds favor cooler and possibly wetter conditions to begin with and warmer conditions to finish. More to come on this in the days to come.

Please take the heat this weekend seriously. If you must be outside, try to stay in the shade as much as possible. Stay hydrated and be sure to watch the elderly and your pets!

For updates throughout the weekend, stick with WBZ-TV, CBS Boston News and CBSBoston.com

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