Phoenix registered a record temperature for Aug. 2 on Sunday as the city baked under an extreme heat warning that the National Weather Service said would remain in effect through Tuesday night. The official observation site at Phoenix Sky Harbor International Airport recorded the city’s high at 115 degrees Fahrenheit at 3:02 p.m. MST, surpassing the previous Aug. 2 record of 114 degrees set last year.
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The National Weather Service relies on a handful of official monitoring locations for the city’s temperature and weather data, and Phoenix Sky Harbor is the primary station used for the metropolitan area’s official readings. That Sky Harbor observation is the one reflected in the city’s record books and used to determine when the city has reached or exceeded prior marks. Sunday’s 3:02 p.m. reading of 115°F is listed as the official high for the day and the new benchmark for Aug. 2.
Alongside the recorded temperatures, the National Weather Service maintained an extreme heat warning for Phoenix and surrounding areas, indicating that the hazardous heat was expected to continue. The warning was issued with an expiration expected on Tuesday night, meaning the region would remain under official heat-alert conditions for multiple days spanning the weekend into the early part of the week.
The downtown skyline was visible as temperatures climbed into the triple digits; imagery from the city shows the skyline at dusk during the period when the meterological readings were taken. Downtown Phoenix skyline at dusk as the city records a sweltering high — Phoenix hit 115°F at Sky Harbor amid an extreme heat warning.
Records maintained for specific calendar dates are updated when an official observation exceeds the previous reading for that date, and Sunday’s value surpassed the 114°F mark recorded on Aug. 2 of the prior year. The National Weather Service’s announcement and the Sky Harbor measurement together established the new high for the day on official tallies.
The extreme heat warning issued by the National Weather Service remained in place through Tuesday night, encompassing that span of days as the period during which dangerously hot conditions were expected. The warning designation by the agency signals that the weather pattern producing the elevated temperatures would persist over multiple consecutive days, according to the watch and warning framework used by the service.
Sunday’s record measurement came during the mid-afternoon reading cycle, with the official time of 3:02 p.m. MST recorded at Sky Harbor. That time is used as the official measurement for the city’s daily high. The new mark replaces the prior one-year-old record for Aug. 2 and will stand in the annals of the city’s daily temperature history unless later superseded by another observation on the same date.
With the National Weather Service’s warning in effect through Tuesday night, the official outlook covered the stretch from Sunday afternoon into the early portion of the work week. The observation at Sky Harbor and the NWS advisory together defined the conditions that were in effect for Phoenix over that period, with the 115°F reading recorded as the city’s official high for Sunday and the extreme heat warning remaining the operative notice from the weather agency.
Those two developments — the Sky Harbor reading of 115°F at 3:02 p.m. Sunday and the continuation of an extreme heat warning through Tuesday night — were the principal official items released by meteorological authorities for the region over the weekend. The new daily record for Aug. 2 and the active warning from the National Weather Service were the central facts documented for Phoenix during that stretch of days.
The National Weather Service Phoenix (@NWSPhoenix) also reported a record warm low temperature of 94°F at Sky Harbor on Sunday morning, breaking the previous mark for the date and underscoring the dangerous lack of overnight cooling during the heat wave. The agency later confirmed additional regional records, including 117°F at Imperial, California tying its 1969 high.
Maricopa County and partner agencies launched the 2026 Heat Relief Network on May 1, opening dozens of cooling centers, hydration stations and respite sites across the Valley and directing residents to 2‑1‑1 for locations and assistance. (maricopa.gov)
The City of Phoenix this year expanded cooling-center hours and adopted an updated heat-response plan to increase access to extended-hour relief and outreach for vulnerable residents during extreme-heat events. (azfamily.com)
Arizona Public Service said customers set a new all-time peak energy demand of 9,053 megawatts on July 24, 2026, highlighting elevated stress on the power system as the region endures prolonged high temperatures. (aps.com)