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Today's Weather: Summer Heat Is Coming

Yesterday evening I found myself reflecting on how wonderful the weekend's weather had been. I suppose for some people it might have been a little cool, but the lack of heat and humidity just made it so easy to be outside.

Things are going to change this week in a big way. It's worth pointing out that an official heat wave is three days in a row of 90 degrees. While it's unlikely that Logan Airport will see that this week, those of you in inland areas could see your first heat wave of the season this Friday Saturday and Sunday.

High pressure has been in control out of Canada and will continue to keep the weather comfortably cool and dry for a couple of more days. The fluctuation from night to day will be quite dramatic, with the dry air making for comfortable sleeping nights and warm afternoons.

On Thursday the humidity will start to creep in. At first dew points will be in the 60s, but eventually get into the 70-degree range. Temperatures will be near 90 degress on Friday.

The reason for the impending heat is a southwesterly flow of air, which will develop on the backside of high-pressure heading into the weekend. The timing of the next cold front will determine when temperatures return to more seasonable levels, and humidity and heat are swept out to sea.

Obviously all this dry weather paired with heat on the way is going to put a lot of pressure on lawns and other vegetation. Be sure you are watering.

You can follow my updates here and on Twitter @growingwisdom.

Monday: Sunshine and pleasant. Highs 68-75. Coolest coast

Monday night: Clear and comfortably mild. Lows 50-55

Tuesday: Mainly sunny and pleasant. Highs near 77. Cooler Cape

Tuesday night: A few clouds. Milder. Lows 54-59

Wednesday: Sun and clouds. Highs in the 78-83 degree range.  70s down the Cape

Thursday: More clouds, potential shower, somewhat muggy. Highs 84-88. Cooler Cape

Friday: Clouds and sun. Highs near 90. Cooler south coast.

Saturday: Sun and clouds. Hot and humid with highs near 90.

Sunday: Partly cloudy. Highs around 90.

David Epstein Twitter Meteorologist
David Epstein is WBUR's meteorologist.

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