Phoenix

Phoenix Braces for Heat Wave with Temperatures Nearing 110 Degrees, Chance of Thunderstorms Offers Slight Relief

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Published on August 23, 2025
Phoenix Braces for Heat Wave with Temperatures Nearing 110 Degrees, Chance of Thunderstorms Offers Slight ReliefSource: Google Street View

Phoenix residents can expect a scorching hot week ahead, with temperatures soaring to highs near 110 degrees. The forecast predicts mostly sunny skies, but with a series of chances for showers and thunderstorms spilling into the region periodically throughout the week, especially from Saturday onwards when there is a 10 percent chance of showers after 3 p.m. and a heat index potentially hitting 112 degrees, according to the latest data from the National Weather Service.

While overnight temperatures are slated to dip just below the 90s, the brief respite will be shattered by the sweltering heat forecasted for Sunday, heating up near 110 degrees again the city won't catch a break from the relentless Arizona sun as the mercury climbs, despite a slight breeze anticipated from the east shifting west southwest in the afternoon. A pattern of potential precipitation will commence Monday, with a 20 percent chance of showers after 11 a.m., followed by a more significant possibility of showers and thunderstorms Monday night at 40 percent chance.

The likelihood of wet weather persists into midweek, where Tuesday brings both a 40 percent chance of showers and thunderstorms and a slight cooldown with a high near 99 degrees, signaling a modest when compared to the triple-digit inferno of previous days. The evening could see showers and possibly a thunderstorm before 11 p.m., with the chance of showers continuing after 11 p.m., the potential rainfall varying between a tenth and a quarter of an inch, though thunderstorms could prompt higher amounts.

Heading into Wednesday and Thursday, the forecast indicates a 40 percent and 30 percent chance of showers and thunderstorms, respectively, with temperatures hovering in the high 90s during the day and the low 80s at night; providing a mild reprieve to the day's heat as the wind shifts gently from east southeast to west through the afternoon before settling down at night.

The week rounds off with an outlook of mostly sunny skies on Friday, and, while still warm with a projected high near 102 degrees.