Phoenix is waking up under a dry, mostly clear sky and a toasty 77°F at Sky Harbor this morning, with relative humidity sitting around 15% and light east-southeast breezes. The headline: it is hot already, and there is not much relief coming through the Fourth of July weekend. Highs are expected to land near 106°F on Friday, July 3, with similar readings on Saturday, July 4, and overnight lows only sliding into the low 80s. With daytime humidity staying very low, even short trips outside will feel oppressively hot, so it is a good idea to schedule anything outdoors for early morning or after sunset and check in on neighbors who are more vulnerable to the heat.
Afternoon And Holiday Forecast
Forecasters are calling for a high near 106°F on Friday, July 3, under mostly sunny skies with light south winds. Independence Day on Saturday, July 4, will bring periods of mostly cloudy skies, but do not count on clouds to bail you out from the heat: the high is again forecast near 106°F, with only a minimal chance of brief sprinkles.
The National Weather Service in Phoenix reports that a strengthening subtropical ridge will drive widespread highs toward about 110°F by Monday, July 6, then into the 110-112°F range on Tuesday and Wednesday, July 7-8. As of Friday morning there were no heat watches or warnings in effect, but forecasters note that the overall heat risk is expected to increase early next week.
Heat Relief And Safety
The City of Phoenix, along with regional partners, is operating dozens of cooling centers, hydration stations and a regional Heat Relief Network. The city’s heat page lists available locations and notes that people can call 2-1-1 for transportation and assistance. It is a classic Phoenix survival plan: keep outdoor chores to early morning or after sunset, drink water frequently and make a concrete plan for children, elders and anyone relying on temperature-sensitive medical equipment.
If you are heading out to Fourth of July events, bring more water than you think you will need, pick out shaded meeting spots in advance and build in regular breaks indoors. That patriotic T-shirt will feel a lot better in air conditioning.
Dry Air And Fire Concerns
Afternoons will remain very dry, with daytime humidities dropping into the single digits and only modest recovery overnight. That keeps fuels receptive and allows seasonally elevated fire danger to linger, even with generally light winds in the forecast.
Forecasters say brief gusts are possible from any isolated afternoon showers or virga on Saturday, but measurable rain across the Valley is unlikely. Expect the hot and dry pattern to stick around, and watch for updates if any heat or fire watches or warnings are issued or if the forecast shifts ahead of the holiday.
