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Daytime peak temps heading back to high 40s next two days, forecasters say

Shaggy Lacz, of Yaphank, catches a rainbow trout

Shaggy Lacz, of Yaphank, catches a rainbow trout in the waters of the Connetquot River while fly fishing with a friend at the Connetquot River State Park and Preserve, Thursday. Credit: Newsday/Steve Pfost

After an unusually mild day in the 60s, the temperature on Long Island is expected to plummet about 20 degrees Friday.

After possible overnight rain Friday, the high will climb to just 48 degrees. It will be clear and sunny most of the day but breezy and then markedly colder at night, when temperatures will likely hit freezing, the National Weather Service said.

Another chilly but clear, sunny day arrives Saturday, with a high of just 47 degrees after morning frost.

Then, a bit of a warmup for Sunday, when highs go up to the mid 50s and there is a 30% chance of rain during the afternoon, going up to 80% at night and 50% Monday.

Cooler temperatures appear to be on tap for next week, with daytime highs in the high 40s most days, the weather service said, and Thanksgiving Day predicted to be sunny and just shy of 50 degrees.

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