“It’s not the heat, it’s the humidity.” Many hear this weather cliche through the summer and probably even utter it. There is some meteorological truth to it.

Last Sunday, our high temperature soared to 93 degrees, but with low humidity, the heat index was never higher than 93, so it never felt hotter than it actually was.

On Father’s Day, it was not quite as hot. Highs were only in the upper 80s. But with much higher humidity, the heat index surged as high as 95 degrees. So yes, quite often, the humidity is indeed the culprit of discomfort.

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That high humidity will be with us again Monday, which should start with sticky sunshine but may not end that way.

A cold front will slice through the humid air mass later in the afternoon through the overnight, likely producing some heavy downpours and possibly strong thunderstorms.

The strongest storms may cause some damaging wind gusts and small hail, with the chances for severe weather increasing the farther northwest one travels.

For most of South Jersey, the worst weather will arrive towards the evening and end before midnight. Not everyone will see heavy rain or severe storms, but the potential is there for a few strong storms.

Once the cold front sweeps offshore late Monday night, we’ll see a modest reprieve from the humidity Tuesday but no noticeable change in temperature.

No heat waves are in sight, as I don’t see any prolonged stretches of 90-degree weather. However, highs will remain above average and well into the 80s through next weekend.

The break from the summer mugginess won’t last long, as the higher humidity returns later in the week. That will in turn fuel our next chance for scattered showers and thunderstorms by the end of the week, likely continuing through next weekend.

Summer begins at 12:24 a.m. Wednesday with the summer solstice. It’s the longest day of the year in South Jersey, with just short of 14 hours and 57 minutes of daylight.

Contact: 609-272-7247 DSkeldon@pressofac.com

Twitter @ACPressSkeldon

Broadcast meteorologist for 15 years (Marquette, Michigan; Burlington, VT; Albany, NY; South Jersey). NBC40 Chief meteorologist from December 2003 through December 2014. Press meteorologist since January 2015

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