PHOENIX — Temperatures are heating up as high pressure builds in.
The Valley will be back in the triple digits starting Wednesday and Phoenix could top 105 degrees for the first time this year by Thursday.
Our average first 105-degree day is May 22nd, so heat this intense is not uncommon for late May.
Air quality is getting worse, too. With light winds and sunny skies, ozone pollution is building up.
An Ozone High Pollution Advisory is in effect in the Valley on Wednesday.
Breathing in ozone pollution can lead to health impacts like chest pain, coughing, throat irritation, congestion and difficulty breathing. Kids, older adults and anyone with any kind of respiratory condition like asthma, bronchitis or COPD can be especially susceptible to the impacts of ozone pollution. So, limit your time outside in the afternoon when ozone pollution is peaking.
Everyone can help prevent the pollution problem from getting worse by carpooling, taking public transportation or working from home. Also, wait until after dark to fill up your gas-powered vehicles and avoid idling in long drive-thru lines.
Breezes will pick up on Friday, which should help drop ozone pollution in the Valley
Here in the Valley, gusts will peak near 25 mph. Up north, gusts could top 35 mph on Friday, bringing more critical fire weather conditions to parts of the high country as conditions stay dry.
Temperatures could take a slight dip heading into Memorial Day weekend with daytime highs briefly sliding back into the upper 90s.
High pressure rebuilds around Memorial Day, however, pushing temperatures back into the low 100s across the Valley.
2025 Sky Harbor Official Rainfall to date: 1.02" (-1.86" from average)
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2024 Sky Harbor Official Rainfall to date: 4.54" (-2.68" from average)
Monsoon 2024 Sky Harbor Official Rainfall: 0.74" (-1.69" from average)
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Daily rainfall reports from all across the Valley can be found here.
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PHOENIX IS GETTING DRIER - LOWER RAINFALL AVERAGES NOW
Average Monsoon Rainfall in Phoenix (1981-2010): 2.71" of rain
NEW Average Monsoon Rainfall in Phoenix (1991-2020): 2.43" of rain
Average Yearly Rainfall in Phoenix (1981-2010): 8:03" of rain
NEW Average Yearly Rainfall in Phoenix (1991-2020): 7.22" of rain
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