Arizona weather forecast: 100-degree temps sticking around in Phoenix

4 PM Weather forecast - 5/21/2025

With triple-digit temperatures in the Valley, if you're going outside make sure to get out early!

PHOENIX - Buckle up! Arizona's weather is going to begin really heating up.

What they're saying:

"After slightly below normal temperatures today, a steady warming trend will eventually push daytime highs to around 100° by Wednesday before peaking between 102-107° on Thursday and Friday. Widespread Moderate HeatRisk is expected for Wednesday-Friday," the National Weather Service in Phoenix said on May 18.

Looking Ahead:

On Tuesday, the high was 99°F, but on Wednesday, triple-digit highs are expected. The 100-degree highs are expected to stick around until early next week.

You can always check the latest weather conditions by visiting the FOX 10 Phoenix weather page, or download the Free FOX 10 Weather app, which is available on Apple iOS and Android.

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