After a string of warm, sunny days, Long Islanders may not be too surprised to find that the month is on pace to be the warmest September in decades, according to the National Weather Service.

Already the first 16 days -- 14 of them above normal -- led Long Island MacArthur Airport in Ronkonkoma to be ranked the warmest for that time period since 1984, when the weather service started maintaining the Island's official records there.

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The average monthly temperature as of Wednesday was 73.5 degrees, 5.3 degrees above the norm, the weather service said. Two days have registered highs of 91, with eight in the 80s.

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The average high for this time of year is 74 degrees, with 57 the low, said Jay Engle, weather service meteorologist based in Upton.

Early afternoon Thursday saw 85 degrees at the airport, with another mid-80s degree day possible for Friday.

News 12 Long Island meteorologist Rich Hoffman said he'll be keeping an eye on a possible record-breaking high Friday, with the present record of 81, set in 2005.

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After that, highs look to reach the 70s for the next several days, but are still expected to register at or above normal, with lows coming closer to normal, Engle said.