Miami has just broken one of its oldest heat records: last Friday, the thermometer soared to 96°F (35.6°C), surpassing a daily high that had stood since 1909. This comes as Florida remains gripped by an extended period of extreme temperatures, with forecasts suggesting the intense heat may persist in the coming days.
The National Weather Service in Miami confirmed that the 96°F (35.6°C) recorded on Friday set a new record high for that date, surpassing the 95°F (35°C) reached over a century ago in 1909.
This record-breaking event was not an isolated incident. The Florida State Watch Office warned on Sunday that a powerful high-pressure system anchored over the southern United States has perpetuated a prolonged heatwave, featuring temperatures well above normal and a hazardous mix of heat and humidity across nearly all of Florida.
Extreme Heat and Humidity Conditions
For instance, on Sunday, heat indices may reach or exceed 108°F (42.2°C) in areas under heat advisories. In northeastern Florida and the Panhandle, these values could approach 110°F (43.3°C). Authorities have cautioned that this situation is likely to continue into the next workweek.
In South Florida, the extreme heat is compounded by the arrival of Saharan air, which introduces dry air at mid-atmospheric levels, reducing the chance of rain. For much of the peninsula, the probability of precipitation remains below 30% on Sunday, thereby limiting one of the few natural reliefs from the high temperatures.
Impact on Local Communities
CBS Miami had already warned on Saturday that the combination of humidity and actual temperatures above 90°F (32.2°C) would result in heat indices surpassing 100°F (37.8°C) from Pompano Beach to Key West. The outlet noted that these hot and dry conditions could persist through midweek.
This situation has been building up over several weeks. Early in August, Miami-Dade and Broward counties were already experiencing heat indices above 105°F (40.6°C), prompting authorities to keep cooling centers available to protect vulnerable populations, including the elderly, young children, individuals with chronic illnesses, and outdoor workers exposed for extended periods.
The extreme heat did not begin in August. Back in May, Miami and Fort Lauderdale nearly reached historical records for that time of year, with temperatures ranging 4 to 8 degrees Fahrenheit (2.2 to 4.4 degrees Celsius) above the usual averages during that period.
Florida has witnessed other notable records in recent years. In July 2025, Tampa hit 100°F (37.8°C) for the first time in its history, marking an absolute record since the city's meteorological records began in 1890.
FAQs on Florida's Extreme Heat Conditions
What caused Miami to break its heat record from 1909?
The heat record was broken due to a combination of factors, including a strong high-pressure system over the southern United States and extended periods of extreme heat and humidity.
How are authorities responding to the heatwave in Florida?
Authorities have issued heat advisories and made cooling centers available to protect vulnerable populations, including the elderly, children, and outdoor workers.
What impact does Saharan air have on South Florida's weather?
The arrival of Saharan air introduces dry air at mid-atmospheric levels, reducing the chances of rain and thereby limiting natural relief from the high temperatures.