NYC heat and air-quality watch — Friday, June 5, 2026. Two things are stacking up today: high heat (mid-80s in most of the city, near 90 on Staten Island) and an Air Quality Health Advisory for ground-level ozone covering all five boroughs from 11 a.m. to 11 p.m. Neither is an emergency on its own, but together they make this an afternoon to plan around. Here is what every New Yorker needs to know.
What the advisory actually says
The New York State Department of Environmental Conservation, through the National Weather Service in Upton, has forecast an Air Quality Index above 100 for ozone across New York, Bronx, Kings, Queens, and Richmond counties today. AQI above 100 is “unhealthy for sensitive groups.” Ozone is not the smoky haze of a wildfire year — it is an invisible gas that forms when sunlight cooks vehicle and industrial emissions on hot, stagnant days. It builds through the day and peaks in the late afternoon, then fades after sunset. That is why the advisory runs to 11 p.m.
Who should be careful
The state singles out the very young, older adults, and anyone with asthma, COPD, or heart disease. If that is you or someone you care for, the guidance is simple: limit strenuous outdoor activity this afternoon. A walk to the store is fine; a 5 p.m. interval workout in the park is the thing to move. If you get short of breath, wheezy, or chest-tight, ease off and check with your doctor.
Heat-and-air game plan for today
- Shift exertion to the morning. Before about 10 a.m., both the heat and the ozone are at their lowest. After-work runners and cyclists are walking into the worst window — 2 to 6 p.m.
- Hydrate ahead of thirst. Highs near 90 on Staten Island and upper 80s elsewhere, with muggy low-70s overnight, mean your body never fully cools off. Drink before you feel thirsty.
- Use the city’s cool spaces. Libraries, malls, and museums are free or cheap air conditioning. If you do not have AC at home and feel overheated, do not tough it out.
- Check on neighbors. The people most at risk in heat are older adults living alone. A two-minute knock matters.
- Mind pets. Pavement is hot enough to burn paw pads by afternoon. Walk dogs early and late, and never leave any animal in a parked car.
- Windows and AC. Run the AC if you have it; close blinds on the sunny side of the apartment to keep rooms cooler.
City services are running normally
This is a heat-and-air day, not a storm day, so the basics hold: MTA subways and buses are on regular schedules with no weather delays; NYC public schools are in session (individual buildings may move recess indoors during the afternoon peak); Alternate Side Parking is in effect — June 5 is not a 2026 suspension date; and DSNY garbage and recycling collection is on its normal schedule. The next ASP suspension is Juneteenth, Friday, June 19.
When it breaks
Today’s air clears after 11 p.m. as the sun goes down and the ozone disperses. Saturday is hotter (near 87°F in Manhattan, 92°F on Staten Island) before showers and thunderstorms arrive Saturday night and scrub the air. Sunday is the relief: sunny, near 84°F, with a drier northwest breeze. If today’s advisory has you holding indoor, Sunday is your outdoor day.
Sources: NYS DEC / NWS Upton Air Quality Health Advisory, issued June 5, 2026, 3:42 a.m. EDT (effective 11 a.m.–11 p.m.), via api.weather.gov active alerts. Forecast: National Weather Service, Upton NY (gridpoints OKX/33,42 and OKX/29,35), issued June 5, 2026, 07:08 UTC. Air quality info: on.ny.gov/nyaqi, hotline 1-800-535-1345.
