The Miami record high temperature of 100 degrees Fahrenheit, reached on Tuesday 18 August, has tied an all-time mark last set in 1942, prompting warnings for residents and the visitors who make the city one of the United States’ most-travelled destinations. The National Weather Service confirmed the reading was only the second time Miami has reached 100°F since records began in 1895.
‘Did you hear the news? Miami reached 100 degrees Fahrenheit this afternoon for only the second time since 1895,’ the NWS posted on X. ‘This ties the all-time high temperature record last reached in 1942!’
While triple-digit heat is routine across Phoenix, Las Vegas and Dallas, it is far from standard in Miami. The rarity of the reading underlines a broader shift in US summer conditions, with heat events becoming more frequent and more intense across the country.
Miami record high temperature: what the forecast shows
The peak did not persist. By the day after the record was set, temperatures had eased back to approximately 95°F, which The Weather Network indicates is likely to hold as the approximate daily high through the remainder of the week. Forecast readings for the period from 20 to 25 August sit between 91.4°F and 93.2°F, offering a modest but not comfortable reprieve.
That said, temperatures in the low-to-mid 90s still carry real risk, particularly for groups the NWS classifies as most vulnerable to heat-related illness: young children and infants, older adults (especially those living alone or with limited mobility), people with chronic medical conditions, and pregnant women. The NWS notes that extreme heat events have been associated with adverse birth outcomes including low birth weight and preterm birth.
The operational disruption extreme heat can cause to travel is also worth flagging. On 12 July, Salt Lake City International Airport was forced to divert multiple flights after pilots raised concerns about conditions as temperatures exceeded 100°F in Salt Lake City, a direct illustration of how heat affects not just traveller comfort but flight operations and itineraries.
Cooling centres and heat safety guidance for Miami visitors
For those already booked to travel to Miami, the city operates a network of 22 cooling centres running from the start of May through to the end of October. According to the Miami-Dade County government, each centre provides air conditioning, restrooms, water and seating, and is stocked with cooling kits containing ice packs, electrolytes, a water bottle, a paper fan and a cooling towel. Most sites are located in parks or libraries chosen for their proximity to communities with health-vulnerable populations. Operating hours vary by location.
The NWS sets out standard guidance for managing heat exposure across different settings. Outdoors, the advice is to stay hydrated, seek shade and limit strenuous activity during the hottest parts of the day. Indoors, it recommends checking on neighbours, particularly elderly individuals and those without air conditioning. In vehicles, the NWS is unambiguous: never leave children or pets unattended, and always check the back seat before locking the car.
‘Heat can be very taxing on the body and can lead to heat-related illnesses or make existing health conditions worse,’ the NWS states. ‘Everyone can be vulnerable to heat, but some more so than others.’
Travel agents and tour operators fielding enquiries about Miami this summer should ensure clients are aware of the cooling centre network and carry that basic heat-safety information before they travel. With the Miami record high temperature now on the books and the broader US heat trend showing no sign of reversing, destination briefings for warm-weather US cities will need to carry more weight than a packing list.
