National Weather Service Forecast for: Hempstead NY
Issued by: National Weather Service New York, NY
Updated: 7:08 am EDT Jun 30, 2026
 
Today

Today: Mostly sunny, with a high near 88. South wind 9 to 15 mph.
Mostly Sunny

 Tonight

Tonight: A 20 percent chance of showers and thunderstorms after 11pm. Partly cloudy, with a low around 71. Southwest wind 9 to 16 mph.
Slight Chance
T-storms

 Wednesday

Wednesday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 99. South wind 10 to 14 mph.
Mostly Sunny
then Slight
Chance
T-storms
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 75. Southwest wind 9 to 11 mph.
Partly Cloudy

 Thursday

Thursday: Sunny, with a high near 99. Southwest wind 7 to 13 mph.
Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 80.
Mostly Clear

 Friday

Friday: A 30 percent chance of showers after 2pm. Increasing clouds and hot, with a high near 100.
Sunny then
Chance
Showers
 Friday
Night
Friday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 78.
Chance
Showers then
Partly Cloudy
 Independence
Day
Independence Day: A 40 percent chance of showers after 2pm. Mostly sunny, with a high near 95.
Mostly Sunny
then Chance
Showers
Hi 88 °F Lo 71 °F Hi 92 °F Lo 75 °F Hi 99 °F Lo 80 °F Hi 100 °F Lo 78 °F Hi 95 °F

Hazardous Weather Outlook
Extreme Heat Watch
 

Today
 
 Mostly sunny, with a high near 88. South wind 9 to 15 mph.
Tonight
 
 A 20 percent chance of showers and thunderstorms after 11pm. Partly cloudy, with a low around 71. Southwest wind 9 to 16 mph.
Wednesday
 
 A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Heat index values as high as 99. South wind 10 to 14 mph.
Wednesday Night
 
 Partly cloudy, with a low around 75. Southwest wind 9 to 11 mph.
Thursday
 
 Sunny, with a high near 99. Southwest wind 7 to 13 mph.
Thursday Night
 
 Mostly clear, with a low around 80.
Friday
 
 A 30 percent chance of showers after 2pm. Increasing clouds and hot, with a high near 100.
Friday Night
 
 A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 78.
Independence Day
 
 A 40 percent chance of showers after 2pm. Mostly sunny, with a high near 95.
Saturday Night
 
 A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 75.
Sunday
 
 A 30 percent chance of showers. Mostly sunny, with a high near 93.
Sunday Night
 
 A 40 percent chance of showers. Mostly cloudy, with a low around 73.
Monday
 
 A 30 percent chance of showers. Partly sunny, with a high near 87.

 

Forecast from NOAA-NWS for Hempstead NY.