After a Christmas holiday that felt more like Los Angeles than Lynbrook, weather more typical for the final week of the year on Long Island could arrive by Monday.

The unseasonably warm December continued Friday, with the temperature hitting a record high of 65 in Islip. But expect a cool-down in the coming days, according to the National Weather Service.

There’s a 50 percent chance of rain Saturday for much of Long Island with highs near 50 degrees. The temperature is expected to drop slightly to 48 overnight with rain and fog predicted, according to the weather service.

Sunday should see a return to balmy conditions with a high of 63 predicted and a 30 percent chance of showers and overcast skies in the forecast.

By Sunday night, the temperature is expected to drop to a low of 44 for much of Long Island. It will stay close to that Monday with periods of sun peeking through the clouds before the arrival of temperatures near freezing Monday night and a possible mix of rain and snow.

People enjoy temperatures in the low 60s on the Long Beach boardwalk on Christmas. Seasonably chilly weather is forecast to close out 2015, after a record-breaking stretch of warm December days. Photo Credit: Barry Sloan

A 40 percent chance of snow and sleet will begin about 9 p.m. Monday, turning to rain overnight into Tuesday, said Tim Morrin, a meteorologist with the National Weather Service in Upton.

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“It would certainly be spot-on normal for this time of year,” he said.

But with temperatures still above average for this time of year, it’s unlikely there will be much if any accumulation if the wintry mix occurs, he said.

The possible return of seasonable winter weather Monday would also mean the return of heavy coats, gloves and scarves for Long Islanders after a Christmas holiday more in line with shorts and T-shirts.

Islip hit 57 shortly after midnight Friday — breaking a record for the day, Morrin said. That record was brief. It was shattered during the day Friday with the 65 reading, bypassing last year’s record of 56, according to the National Weather Service.

Central Park set a record high of 66 Friday, surpassing the 1982 record of 64, and the recording station at Kennedy Airport also broke a record, with a temperature of 64 degrees, according to the weather service.

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The normal high for Dec. 25 at Islip is 40 degrees, Morrin said, with a normal low of 26.

Although a cooling trend is expected to set in over the next few days, Morrin said it won’t cool off too much.

“It’s really hard to find any temperatures in our seven-day forecast that are normal,” he said. Temperatures in Islip have been 11.9 degrees above the average for December.

Along with above-normal temperatures, Long Island also has seen a higher-than-usual amount of precipitation this month, Morrin said.

The Island received a total of 4.09 inches of rain as of Dec. 24 — 0.87 inches above the average amount for the month.

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With John Asbury