Weather forecasters consider September the meteorological start of autumn. And with the coming week's seasonable chill, coupled with a storm expected Tuesday into Wednesday, Long Island will feel like it as the autumnal equinox approaches.
Monday will see temperatures in the upper 70s and lows in the lower 60s, with increased cloud cover Monday night as the storm system moves in, said David Stark, meteorologist with the National Weather Service's Upton office.
Tuesday will have highs in the upper 70s and overcast skies, Stark said.
A chance of showers and thunderstorms will increase as the day continues and moves into Wednesday, with showers, periods of heavy rain and gusty winds of 30 to 35 mph possible.
Lows Tuesday will be in the mid-60s, Stark said.
A cold front moving in from the west will bring cooler temperatures on Wednesday, with highs around 75 degrees and mostly sunny to partly cloudy skies.
Lows on Wednesday will be in the 50s.
Temperatures will continue to drop as the week progresses, with highs on Thursday near 70, and lows in the 50s.
"It's a little cooler than what we typically see this time of year," Stark said.
Highs on Friday will be in the lower 70s, giving Long Island a fall-like atmosphere as the autumnal equinox arrives Saturday.