National Weather Service Rain Chances for Florida Florida on Sunday, June 21, 2026.
MIAMI, Florida – The National Weather Service in Miami forecasts scattered to numerous showers and thunderstorms across South Florida this afternoon and evening on Sunday, June 21, 2026. Slow-moving storms are expected, especially along the East Coast metro areas including Miami-Dade and Broward counties (Miami, Fort Lauderdale, and Boca Raton).
Storms could begin developing as early as 1:30–2 p.m. but are most likely between 3 p.m. and 9–10 p.m. The main hazards include frequent lightning, gusty winds, and locally heavy downpours that may cause poor drainage flooding. An isolated stronger storm cannot be ruled out, though the overall risk of severe weather (damaging winds, large hail, or tornadoes) remains low.
NWS Miami – Afternoon Showers and Storms, Sunday, June 21, 2026
These storms may produce wind gusts of 40–60 mph and locally heavy rainfall, with the potential for 2–4 inches in isolated spots over a short period.
NWS Miami Rain Chances, Sunday, June 21, 2026
High temperatures will range from the upper 80s to low 90s this afternoon, with heat indices reaching 103–106°F. A Heat Advisory remains in effect through this evening for parts of South Florida.
NWS Miami South Florida Doppler Radar
Miami Weather Forecast
Sunday
Mostly sunny, with a 40% chance of showers and thunderstorms after 2 p.m. High near 91–92°F. Heat index values up to 105–106°F. Light and variable wind becoming south 5–8 mph in the afternoon.
Sunday Night
A 30% chance of showers and thunderstorms, mainly before 10–11 p.m., then partly cloudy. Low around 80°F. Light and variable wind.
Monday
Mostly sunny, with a 20% chance of showers and thunderstorms after 2 p.m. High near 92°F. Calm wind becoming southeast 5–8 mph in the afternoon.
Monday Night
Partly cloudy, with a 20% chance of showers and thunderstorms before 2 a.m. Low around 81°F. Southeast wind 3–6 mph.
Tuesday
Mostly sunny, with a 30% chance of showers and thunderstorms after 2 p.m. High near 91°F. South wind 3–8 mph.
Tuesday Night
Partly cloudy, with a 20–30% chance of showers and thunderstorms before 8 p.m. Low around 80°F. Southeast wind around 6 mph.
Wednesday
Mostly sunny, with a 20% chance of showers and thunderstorms after 2 p.m. High near 92°F. Calm wind becoming southeast 5–9 mph in the afternoon.
