National Weather Service United States Department of Commerce

Developing storm will spread rain across eastern U.S.; thunderstorms in the Southeast

A storm system developing in the South will move up the Mississippi River Valley on Sunday bringing rainfall to much of the eastern U.S., along with thunderstorms in the southeastern states. Some of the thunderstorms in the Southeast could produce large hail, damaging wind and heavy rain.
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Hazardous Weather Conditions

Current Conditions

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Islip NY

7 Day Forecast

For More Weather Information:

New York, NY Local Forecast Office

Overnight

Mostly Cloudy

Mostly
Cloudy

Low: 45 °F

Sunday

Partly Sunny

Partly
Sunny

High: 54 °F

Sunday
Night

Rain Chance for Measurable Precipitation 100%

Rain

Low: 51 °FRising Temperatures

Monday

Showers Chance for Measurable Precipitation 90%

Showers

High: 66 °F

Monday
Night

Chance Showers Chance for Measurable Precipitation 30%

Chance
Showers

Low: 50 °F

Tuesday

Mostly Sunny

Mostly
Sunny

High: 55 °F

Tuesday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 36 °F

Wednesday

Rain Likely Chance for Measurable Precipitation 70%

Rain
Likely

High: 41 °F

Wednesday
Night

Rain/Snow Likely Chance for Measurable Precipitation 70%

Rain/Snow
Likely

Low: 34 °F

Detailed Forecast

  • Overnight Mostly cloudy, with a steady temperature around 45. Southwest wind around 9 mph.
  • Sunday Partly sunny, with a high near 54. Wind chill values between 35 and 45 early. Southwest wind 8 to 10 mph.
  • Sunday Night Rain, mainly after midnight. Temperature rising to around 57 by 5am. Southwest wind 8 to 17 mph becoming southeast after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
  • Monday Showers and possibly a thunderstorm before 2pm, then a slight chance of showers after 3pm. High near 66. Breezy, with a south wind around 22 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
  • Monday Night A chance of showers, mainly before 11pm. Mostly cloudy, with a low around 50. South wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.
  • Tuesday Mostly sunny, with a high near 55.
  • Tuesday Night Mostly cloudy, with a low around 36.
  • Wednesday Rain likely. Cloudy, with a high near 41. Chance of precipitation is 70%.
  • Wednesday Night Rain and snow likely. Cloudy, with a low around 34. Chance of precipitation is 70%.
  • Thanksgiving Day Partly sunny, with a high near 43.
  • Thursday Night Mostly cloudy, with a low around 30.
  • Friday Mostly sunny, with a high near 40.
  • Friday Night Partly cloudy, with a low around 27.
  • Saturday Partly sunny, with a high near 40.