Phoenix

Phoenix Set to Swelter with 107°F Heat, Minimal Relief in Sight for Labor Day Weekend

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Published on August 28, 2025
Phoenix Set to Swelter with 107°F Heat, Minimal Relief in Sight for Labor Day WeekendSource: Google Street View

Residents of Phoenix should brace for a week of consistent heat, with temperatures soaring as high as 107°F on Sunday, according to the National Weather Service. The extended forecast shows that the mercury will not be taking much of a dive even overnight, with low temperatures hovering around the mid-80s. Indeed, the reliable clear skies bring daytime heat that refuses to loosen its grip even as the sun sets.

Today's high is expected to near 104°F with a calm breeze shifting west in the afternoon. Meanwhile, tonight will cool modestly to a low around 83°F. The minimal wind movement does little to mitigate the enveloping warmth. Tomorrow and Saturday are anticipated to exhibit an almost identical pattern with sunny skies and highs lingering around the 103°F to 105°F range, respectively. These temperatures, while typical for Phoenix standards, can pose risks for vulnerable populations, particularly the elderly and those without access to air conditioning.

By Sunday, Phoenix is forecasted to hit a scorching high of 107°F, with the evening bringing a slight dip to a low of around 85°F. The pattern of clear skies and minimal wind is expected to continue through the Labor Day weekend. For those with outdoor plans, it might be wise to schedule activities for early in the day or late in the evening to avoid the peak heat hours.

Looking ahead to Labor Day, there is a slight chance of change with a 10 percent chance of showers and thunderstorms after 11 am, offering a potential reprieve from the relentless sun. And while Monday night shows a 30 percent chance for rain accompanied by thunderstorms, don’t expect this to break the heatwave, as temperatures throughout the day will still soar near a high around 105°F.

The possible showers do extend into the week, with Tuesday and Wednesday both having a mild chance of thunderstorms — at 10 and 20 percent probability, respectively. But with highs still forecasted to reach upwards of 104°F, don't count on much cooling. For up-to-date weather conditions, Phoenix denizens can refer to the National Weather Service for the latest information on weather patterns and any potential weather advisories.