National Weather Service Forecast for: Union Park FL
Issued by: National Weather Service Melbourne, FL
Updated: 7:29 pm EDT Jun 18, 2026
 
Tonight

Tonight: Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 79. South wind around 5 mph becoming north northeast in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely then
Chance
Showers
 Juneteenth

Juneteenth: A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 107. South southwest wind around 10 mph.
Mostly Sunny
then Chance
T-storms
 Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 78. Southwest wind around 5 mph.
Chance
T-storms then
Partly Cloudy
 Saturday

Saturday: A slight chance of showers, then showers and thunderstorms likely after 11am. Mostly sunny, with a high near 93. Heat index values as high as 103. West southwest wind 5 to 10 mph. Chance of precipitation is 70%.
Slight Chance
T-storms then
T-storms
Likely
 Saturday
Night
Saturday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Partly cloudy, with a low around 76. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
T-storms
Likely then
Chance
Showers
 Sunday

Sunday: A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Calm wind becoming west around 5 mph in the afternoon.
Mostly Sunny
then Chance
T-storms
 Sunday
Night
Sunday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Southeast wind around 5 mph becoming calm in the evening.
Chance
T-storms then
Partly Cloudy
 Monday

Monday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95. Calm wind becoming west around 5 mph in the morning.
Sunny then
Slight Chance
T-storms
 Monday
Night
Monday Night: A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 78. South southeast wind around 5 mph becoming west in the evening.
Slight Chance
T-storms then
Partly Cloudy
Lo 79 °F Hi 95 °F Lo 78 °F Hi 93 °F Lo 76 °F Hi 93 °F Lo 77 °F Hi 95 °F Lo 78 °F

 

Tonight
 
 Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 79. South wind around 5 mph becoming north northeast in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Juneteenth
 
 A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 107. South southwest wind around 10 mph.
Friday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 78. Southwest wind around 5 mph.
Saturday
 
 A slight chance of showers, then showers and thunderstorms likely after 11am. Mostly sunny, with a high near 93. Heat index values as high as 103. West southwest wind 5 to 10 mph. Chance of precipitation is 70%.
Saturday Night
 
 Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Partly cloudy, with a low around 76. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Sunday
 
 A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Calm wind becoming west around 5 mph in the afternoon.
Sunday Night
 
 A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Southeast wind around 5 mph becoming calm in the evening.
Monday
 
 A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 95. Calm wind becoming west around 5 mph in the morning.
Monday Night
 
 A 10 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 78. South southeast wind around 5 mph becoming west in the evening.
Tuesday
 
 A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 96. West wind 5 to 10 mph.
Tuesday Night
 
 A 10 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78. West southwest wind around 5 mph.
Wednesday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 95. West wind around 5 mph.
Wednesday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77. West southwest wind around 5 mph.
Thursday
 
 A 40 percent chance of showers and thunderstorms. Sunny and hot, with a high near 95. Calm wind becoming southwest around 5 mph in the afternoon.

 

Forecast from NOAA-NWS for Union Park FL.