Phoenix sets another daily heat record, ties March record

PHOENIX — Phoenix set another daily heat record on Saturday, and tied the record for the entire month of March, as it reached triple digits for the fourth straight day.

Temperatures at Phoenix Sky Harbor International Airport — the official reporting site for the National Weather Service — set a March 21 record, peaking at 105 degrees. The previous record high for the date was 97 degrees, set in 2004.

Phoenix matched the record for the hottest day ever recorded in March for the second straight day (105 degrees).

Until this week, Phoenix had reached triple digits in March just once before, on March 26, 1988.

This latest milestone comes during a historic March heat wave that has toppled multiple records across Arizona. On Thursday, Phoenix hit 105 degrees, breaking the city’s all‑time March temperature record. That even tied the warmest temperature ever recorded in April.

The heat hasn’t let up overnight, either. Phoenix logged a morning low of 70 degrees on Saturday, the warmest low ever recorded on March 21 and 3 degrees above the previous record from 2004.

All 3 of the main climate sites either tied or set a new record warm low this morning. Low temperatures will remain in the upper 60s to around 70 degrees for the next several mornings. #azwx #cawx pic.twitter.com/vje2oIPtO8

— NWS Phoenix (@NWSPhoenix) March 21, 2026

On Friday, Phoenix logged a morning low of 69 degrees, the warmest low ever recorded on March 20 and 2 degrees above the previous record from 2017.

Meanwhile, an extreme heat warning is active in metro Phoenix through Sunday.

Extreme heat warnings trigger the daytime closures of some or all hiking trails at Camelback Mountain, Piestewa Peak and South Mountain in Phoenix.

KTAR News 92.3 FM’s Kylie Werner and Serena O’Sullivan contributed to this report. 

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