New York City wakes up to clear skies and a muggy 72°F this morning, but that relatively gentle start will not last. The National Weather Service is calling for a high near 90°F on Tuesday, May 19, 2026, with a Heat Advisory in effect from 11 a.m. Tuesday, May 19, 2026 through 8 p.m. Wednesday, May 20, 2026.
Afternoon Heat And Hazards
The NWS New York (Upton) reports that heat index values could reach the upper 90s in parts of the city, especially in inland neighborhoods and the Bronx. Southwest winds of 8 to 15 mph, with gusts near 20 mph this afternoon, will make it feel even hotter and could push some neighborhoods into the mid 90s by early afternoon. An isolated thunderstorm is possible across interior areas, although more widespread storms are expected on Wednesday.
Air Quality And Sensitive Groups
The New York State Department of Environmental Conservation has issued an Air Quality Health Advisory for ozone from 11 a.m. to 11 p.m. Tuesday, and people with asthma, young children and older adults are urged to limit strenuous outdoor activity. NYSDEC notes that ozone can cause coughing, throat irritation and shortness of breath for sensitive individuals.
Wednesday Storms, Then A Cool Down
Showers and thunderstorms are most likely Wednesday afternoon into the evening, with roughly a 70% chance of precipitation and the main severe threat being damaging straight-line winds on Wednesday, May 20, 2026. Once a cold front moves through, highs fall sharply, with mid 60s expected on Thursday and a cooler, unsettled holiday weekend ahead that brings periodic showers.
What To Do Now
If you do not have air conditioning, the city is opening cooling centers, and you can call 311 or check the city’s Cool Options map for the nearest location and hours. Stay hydrated, avoid the midday sun and postpone heavy outdoor work if possible, and check on older neighbors or anyone with chronic health problems. Boaters and paddlers should also exercise caution because water temperatures remain in the 50s and raise cold-water risk.
