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Islip Information

Islip, New York • Climate data: Islip MacArthur Airport (ISP)
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1991-2020 Normals
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ISP Climate
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THIS EVENING AND OVERNIGHT

Variably cloudy this evening with a slight chance of a passing rain shower. Expect more clouds than clear skies. It will continue to feel warm and humid with temperatures gradually dropping through the 70s this evening.
Overnight, a few spotty rain showers are possible, mostly after 4 a.m. under a mostly cloudy sky. It will be warm and muggy with low temperatures in the lower 70s into early Thursday morning.

THURSDAY'S SPOTTY SHOWERS

A few scattered light rain showers will be possible from 4 a.m. to 9 a.m. Then, breaks of sunshine develop and most of the day will be dry! It will feel like a mid-summer day, too, with high temperatures mostly well into the 80s paired with high humidity. Another chance for a spotty shower or two will be around in the evening, but the chance remains low at this time.

MARINE

There will continue to be a high risk of rip currents at the Atlantic Ocean beaches through Thursday and water conditions on the ocean will be rough to start, but improving throughout the day.
Long Island Rip Currents

EXTENDED FORECAST

TONIGHT: Mainly cloudy and windy with a passing shower possible this evening and tonight. Wind gusts are approaching 30 mph at times. The best chance for scattered light rain showers will arrive after 4 a.m. It will be muggy, with low temperatures around the lower 70s into Thursday morning.
THURSDAY: A few scattered rain showers before 9 a.m. Then, a mix of sun and clouds with a slight chance for a pop-up shower through Thursday night, but most of the day will be dry. It will still feel like summer with high temperatures in the mid-80s along with high humidity. Low temperatures will be around the lower to mid-60s into Friday morning.
FRIDAY: 9-11 | START OF ROSH HASHANAH -- An early morning rain shower is possible before 6 a.m. Otherwise, mostly sunny with lower humidity and high temperatures around 77 degrees. Lows in the upper 50s to lower 60s into Saturday morning.
SATURDAY: Sun and clouds. Highs around 77 degrees. Scattered showers will be possible at night. Lows near 66 degrees.
SUNDAY: A round of rain showers is possible in the morning, with gradual improvements throughout the day. Highs around 79 degrees. Lows near 66 degrees.
MONDAY: Mostly sunny and warm with highs around 80 degrees. Lows near 65 degrees.
TUESDAY: Mostly sunny with highs around 78 degrees. Lows near 67 degrees.
WEDNESDAY: Partly sunny with a few scattered rain showers. Highs around 82 degrees. Lows near 64 degrees.