Phoenix Braces for Early Spring Heat Wave

Records could fall as temperatures climb into the 90s later this week

Published on Mar. 10, 2026

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Phoenix is set to experience a significant heat wave this week, with temperatures expected to climb into the 90s and potentially challenge records. The National Weather Service is forecasting highs in the low to mid 90s from Thursday through Sunday, with the possibility of readings reaching the upper 90s early next week. The hot, dry conditions will settle in quickly and persist, with limited overnight cooling.

Why it matters

This early spring heat wave could pose risks for vulnerable residents, outdoor workers, and those engaging in strenuous outdoor activities. The City of Phoenix is expanding its heat response plan, including keeping a 24/7 respite center open and extending hours at other cooling locations.

The details

A strong high-pressure system building over the Southwest will drive the temperature spike in Phoenix. Daytime highs are forecast to reach the low 90s on Thursday, then climb to around 94-95°F from Friday through Sunday. Monday's forecast is pushing toward the upper 90s. Overnight lows will only drop into the upper 50s to low 60s, providing limited relief. Relative humidity is expected to drop sharply, with minimum values in the single digits in some areas, increasing small-scale fire risk.

  • Tuesday, March 10: High near 78°F, mostly clear skies
  • Wednesday: High around 84°F
  • Thursday: High near 92°F
  • Friday through Sunday: Highs of 94-95°F
  • Monday: Forecast pushing toward upper 90s

The players

National Weather Service

The federal agency that provides weather forecasts and warnings for the United States.

City of Phoenix

The local government of Phoenix, Arizona, which is implementing a new heat response plan to provide relief options for residents.

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What they’re saying

“Temperatures climb steadily: Wednesday should hit around 84°F, Thursday near 92°F, and roughly 94–95°F Friday through Sunday. Monday's forecast is pushing toward the upper 90s.”

— National Weather Service (hoodline.com)

“The 2026 plan keeps a 24/7 respite center open at 20 W. Jackson Street and extends hours at Justa Center at 1001 W. Jefferson St., along with longer library hours at select locations.”

— City of Phoenix (hoodline.com)

What’s next

The National Weather Service may issue heat watches or advisories if the forecast worsens. Residents should monitor the situation and take precautions, such as limiting outdoor activities during the hottest parts of the day, staying hydrated, and checking on vulnerable individuals.

The takeaway

This early spring heat wave in Phoenix highlights the need for proactive measures to protect residents, especially the most vulnerable, from the impacts of extreme temperatures. The City of Phoenix's expanded heat response plan demonstrates the importance of having robust systems in place to provide relief and support during these types of events.