Overview
- The National Weather Service says high pressure is driving temperatures several degrees above normal with Phoenix forecast near 108–109°F and an elevated chance of reaching 110°F this weekend.
- An Extreme Heat Warning is in effect for Grand Canyon areas below 4,000 feet for daytime hours to protect visitors and residents from dangerous conditions.
- State health and fire agencies are urging people to stay in air-conditioned spaces, use cooling centers or hydration stations, limit outdoor activity and check on at-risk neighbors.
- Forecasters expect a southerly surge of moisture later this week that will bring storm chances beginning as early as Friday and raise risks for dry lightning, strong gusts and blowing dust.
- Record-keeping data show Phoenix is running drier than usual so far in 2026 with Sky Harbor reporting 0.32 inches of rain to date and updated monsoon averages slightly lower than past baselines.