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Chilly morning on LI as temp ties record low 59 degrees set in '92

If it felt chilly around sunrise Monday morning, well, it was.

The thermometer read 59 degrees at 5:57 a.m. at Long Island MacArthur Airport in Ronkonkoma, matching the record low set in 1992, the National Weather Service said.

The reason for the summer chill is an unusually strong trough covering the Northeast, said Mike Layer, a meteorologist with the Upton-based service, and a high-pressure system from Canada, which has provided a flow of cooler air.

"Together, they're cooling things off a bit," Layer said.

It's unlikely we'll see the record low for Tuesday -- 54 degrees also set in 1992 -- the service said, but the next several days will remain slightly cooler than normal.

The daily averages for Monday are a high of 80.5 degrees and a low of 62.5, according to statistics by Brookhaven National Lab, which until the service took over in 1984 maintained Long Island's official weather records.

The expected highs for Monday, Tuesday and Wednesday are expected to be 78 to 79 degrees, the service said.

A low-pressure system from the Great Lakes should bring high humidity, slightly higher temperatures and some chance of rain starting Wednesday, Layer said.

Between Wednesday afternoon and into early Saturday, there's a 50 percent to 60 percent chance of rain, Layer said.

That shouldn't hamper the weekend much; by Saturday afternoon and extending into Sunday evening, the forecast should be reasonably clear and sunny, with temperatures back above 80 degrees.

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