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Long Island weather: Hot and muggy Sunday

The weather forecast for Saturday.

The weather forecast for Saturday. Credit: Weather Underground

Sunday looks like shorts weather as the sun peeks out from the clouds and above-average temperatures combine with higher humidity for a muggy day, according to National Weather Service forecasts for Long Island.

“There will be a marked and noticeable increase in humidity,” said Tim Morrin, a meteorologist at the National Weather Service in Upton. The morning temperatures are forecast to be in the mid-60s, rising to the mid-80s in the afternoon.

The dew point, a measure of moisture in the air, is forecast to be near 70 degrees during the day.

“During the day even humidity in the 50s or 60s can be quite oppressive,” Morrin said. “It’s going to make it feel pretty muggy.”

The chance of rain during the day is forecast at 10 percent, but showers and thunderstorms are possible in the evening and Monday morning as a wet weather system that has moved east from Pennsylvania is expected to largely miss Long Island, Morrin said.

For the rest of the week, Long Islanders can expect perfect summer days on Tuesday and Wednesday with sunny skies and average temperatures before the mercury starts to rise on Thursday, Morrin said.

“Right on through the week we’re going to see a trend of really nice weather,” Morrin said.

On Friday, however, temperatures are forecast to get hotter as a “big bubble of hot air” could drive temperatures into the 90s.

“The conditions are ripe … for a real bonafide heat spell and possibly even a heat wave,” Morrin said.

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