Miami is starting Thursday clear and around 81 degrees, with calm winds reported at Miami International Airport around 5:35 a.m. That quiet opening will give way to a hotter, stickier afternoon, with temperatures rising near 90 and the heat index reaching as high as 105. A Heat Advisory is in effect as South Florida heads into the day’s most dangerous stretch.
Heat Peaks Before Afternoon Storm Chances
The advisory runs from noon to 7 p.m. Thursday across South Florida, with heat-index values expected between 105 and 110 degrees, according to NWS Miami. Southeast winds will increase from 2 to 9 mph, but they are unlikely to do much against the humidity. Officials recommend lightweight, loose-fitting clothing and limiting strenuous outdoor activity to the early morning or evening.
Mostly sunny skies should hold through early afternoon before a slight chance of showers and thunderstorms develops after 2 p.m. The rain chance is about 20%, and any storms could drift or consolidate across southern portions of South Florida late in the day. Tonight should turn partly cloudy, with a low near 84 and heat-index values still reaching about 103.
Friday Stays Hot As Weekend Rain Chances Rise
Friday brings more sunshine and a high near 90, but the heat index could climb to 106 as east winds reach 8 to 12 mph. The forecast is wetter Friday night, when the chance of showers and thunderstorms rises to 50% after 8 p.m. Saturday also carries a 50% rain chance, with a sunny high near 90 and stronger southeast winds around 13 mph.
Heat Remains The Main Story Next Week
Sunday looks sunnier and slightly hotter, with a high near 91 and a low around 82. From Monday through Wednesday, highs are expected to reach about 92 each day, with only slight afternoon chances for showers and thunderstorms. Forecasters expect heat-advisory conditions to remain possible into next week, with heat indexes potentially topping 105 to 108 degrees.
