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Hot, dry weather in metro Phoenix may break with thunderstorms this week

A sunny day in Phoenix on Aug. 20, 2025.
Bridget Dowd/KJZZ
A sunny day in Phoenix on Aug. 20, 2025.

After hitting triple-digit temperatures early this week, the Valley is expected to cool down as the week progresses.

Meteorologist Isaac Smith is with the National Weather Service in Phoenix. He says thunderstorms are possible.

“So we’re going to be looking at chances sticking around 10% throughout the first part of the week but then as we head into the ladder half of the week, particularly around the Thursday and Friday time frame, that’s when we’re looking at our best chances," Smith said.

Poor air quality is also forecast early this week. Ozone high pollution advisories are in effect through Tuesday.

Metro Phoenix forecast from NWS

Tuesday: A 20% chance of showers and thunderstorms. Mostly sunny, with a high near 106 and low around 85.

Wednesday: A 20% chance of showers and thunderstorms. Mostly sunny, with a high near 103 and a low around 83.

Thursday: A 20% chance of showers and thunderstorms. Mostly sunny, with a high near 101 and a low around 78.

Friday: A 30% chance of showers and thunderstorms. Mostly sunny, with a high near 98 and a low around 80.

Saturday: A 30% chance of showers and thunderstorms. Mostly sunny, with a high near 99 and a low around 80.

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Jill Ryan joined KJZZ in 2020 as a morning reporter, and she is currently a field correspondent and Morning Edition producer.