By sunrise on Tuesday, June 30, 2026, Miami was already sweating. Clear skies and thick humidity at the airport had temperatures hovering near 81°F, and it will only climb from there. Afternoon highs are expected to top out around 90–92°F, with little relief after dark as coastal areas hang on in the low 80s overnight.
The National Weather Service is warning that peak heat-index values will likely land in the low-to-mid 100s today, which means moderate to major heat impacts for anyone working, commuting, or exercising outside. There is a slight chance of showers and thunderstorms after 5 p.m., and forecasters say rain chances go up on Wednesday, July 1, as a frontal boundary stalls just north of South Florida. Any storms that pop up will be slow-moving and capable of dumping heavy rain in a short amount of time.
Heat Relief And Cooling Sites
To help residents ride out the brutal stretch, Miami-Dade County runs a network of cooling sites during the May–October extreme heat season. The Stephen P. Clark Government Center (111 NW 1st Street) is open daily from 6 a.m. to 8 p.m., according to Miami-Dade County. If you do not have reliable air conditioning, it is a good idea to plan a visit during the hottest hours of the day and to check the county’s webpage for the latest hours and locations.
What To Expect This Week
Showers and thunderstorms become more likely on Wednesday, July 1, and Thursday, July 2. Slow-moving storms could unload heavy rain and trigger localized flooding in low-lying metro neighborhoods. East winds of about 2–10 mph will keep much of the afternoon storm activity tied to the sea breeze, while highs hold in the upper 80s to low 90s and the heat index keeps feeling like the low-to-mid 100s.
Stay hydrated, skip strenuous outdoor work during peak afternoon heat, and keep an eye on radar and timing if you have evening plans. If you or someone you see is struggling with the heat, call 2-1-1 or head to a county cooling site for relief.
