Phoenix is starting Tuesday clear and already near 80 degrees, with the Valley headed for a sunny high around 100. The early warmth will only build through the afternoon, while a drier, quieter pattern sets up before shower and thunderstorm chances return late Thursday.
Triple-Digit Heat Holds Through Wednesday
Tuesday will stay sunny with south winds around 5 mph, and Wednesday should be nearly identical, nudging the high to 101. Overnight lows will remain around 80 to 81, so the after-dark reset will be modest; plan strenuous outdoor work for morning or evening and keep water close.
Storm Chances Return Thursday Night
Rain odds remain minimal through Wednesday, then rise Thursday after 5 p.m. as more moisture moves north, according to the National Weather Service in Phoenix. Thursday night carries about a 50% chance of showers and thunderstorms, followed by a roughly 30% chance Friday and Saturday as highs dip to around 98.
Sunday is expected to warm back to about 101 with only a 20% chance of showers and thunderstorms. The forecast discussion says rainfall coverage and timing remain uncertain, but storms that do develop could bring brief heavy rain, lightning and sudden gusty winds.
Labor Day Looks Hotter Again
Labor Day is currently forecast to be mostly sunny with a high near 103 and a slight 20% chance of showers and thunderstorms. No watches, warnings or advisories are posted for the Phoenix area, but the heat still calls for shade breaks, plenty of water and an early start for outdoor plans.
