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Heat Index Hits 100 In Boca Raton, Delray Beach, Boynton On Sunday

Heat Index June 21 2025
Heat Index June 21 2025
The heat index is soaring in Palm Beach County, according to the National Weather Service which provided this map.

BOCA RATON, FL (BocaNewsNow.com) (Copyright © 2025 MetroDesk Media, LLC) — It’s hot and it’s going to feel extremely hot for the next several days, as the National Weather Service is calling for a heat index — or “real feel” temperature — of at least 100 degrees in South Palm Beach County. While the tropics remain relatively calm for late June, the air temperature is on the warmer side of where we normally are this time of year.

Here is the extended forecast as of Saturday afternoon. For those of you new to South Florida, keep in mind the actual temperature is less relevant than the heat index — the higher it goes, the more likely you are to experience heat-related issues if you spend extended time outside.

This Afternoon: A 50 percent chance of showers and thunderstorms, mainly before 5pm. Mostly sunny, with a high near 88. East wind around 11 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. 

Tonight: A 30 percent chance of showers and thunderstorms, mainly after 3am. Mostly clear, with a low around 79. East wind around 9 mph. 

Sunday: Showers and thunderstorms likely, mainly before 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 87. East wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. 

Sunday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 80. East wind around 10 mph. 

Monday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. East wind 11 to 14 mph, with gusts as high as 21 mph. 

Monday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 79. East wind around 11 mph. 

Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 87. East wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

Tuesday Night: Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms after 8pm. Partly cloudy, with a low around 79. East wind 8 to 11 mph. Chance of precipitation is 60%.

Wednesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. East wind 8 to 13 mph, with gusts as high as 18 mph. 

Wednesday Night: A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 79.

Thursday: A 50 percent chance of showers and thunderstorms. Sunny, with a high near 88.

Thursday Night: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 78.

Friday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.