Extreme Heat Forecast for Phoenix in March

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A strong high-pressure system building over the Southwest will bring dangerously hot temperatures to the Phoenix area next week, with highs potentially reaching over 105 degrees between Thursday and Saturday. This early-season heatwave could break several daily high temperature records and set new marks for the earliest 100-degree and 105-degree days ever recorded in March.

Why it matters

The extreme heat poses serious risks, especially for vulnerable populations. Hiking trails may need to be closed, and residents will need to take precautions like limiting outdoor activity during the hottest parts of the day and staying hydrated. This heatwave is also indicative of the broader trend of Phoenix experiencing higher temperatures and lower rainfall averages due to climate change.

The details

According to the National Weather Service, highs will stay in the 90s on Monday and Tuesday before pushing into the triple digits by the middle of next week. Extreme Heat Watches have been issued for the Valley from Thursday through Sunday. Forecast highs could reach 105 degrees or higher during that period, which is typically not seen until late May in Phoenix. This heat could break several daily high temperature records, as well as set new marks for the earliest 100-degree and 105-degree days ever recorded in March.

• Highs will stay in the 90s on Monday and Tuesday.
• Temperatures will push into the triple digits by the middle of next week.
• Extreme Heat Watches have been issued for the Valley from Thursday through Sunday.
• Forecast highs could reach 105 degrees or higher between Thursday and Saturday.
• The previous record for the earliest 100-degree day in Phoenix was March 26, 1988.

What’s next

The National Weather Service will continue to monitor the situation and provide updates on any potential record-breaking temperatures or trail closures.