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MOST ACCURATE FORECAST: Excessive Heat Warning until 8 p.m. Big cool-down for Labor Day weekend

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PHOENIX — It's been a record-breaking week so far in the Valley!

We kicked it off with back-to-back days of record setting highs and lows on Monday and Tuesday.

This morning, Phoenix only cooled to 93 degrees, breaking the record of 91 degrees set in 2007.

And this afternoon Phoenix peaked at 111 degrees, putting us just shy of the current record of 113 degrees set in 2011.

Excessive Heat Warnings for the Phoenix metro and all of south-central and southwestern Arizona remain in effect until 8 p.m.

So, we remain in ABC15 Weather Action mode as a reminder to take action to keep yourself, your family and your pets safe in this extreme heat. Limit your time outside, stay hydrated and bring your pets inside, too.

Phoenix has already had 52 days this summer with highs at 110 degrees or hotter. That's the second most ever recorded. The record is 53 days set in 2020 and we will flirt with tying that record on Thursday.

Phoenix has also had 22 days so far at 115 degrees or hotter, the most ever recorded in a single year. Previously, the record was 14 days set in 2020.

We could also see more overnight lows in the 90s. We're now up to 34 days with lows in the 90s. The old record was 28 days set in 2020.

As temperatures climb and skies stay mostly sunny, our air quality has been getting worse too.

An Ozone High Pollution Advisory is in effect today. Ozone pollution could reach unhealthy levels making it difficult to breathe, especially if you have asthma or COPD. So, you may want to limit your time outside if you have any kind of respiratory condition.

We have another High Pollution Advisory in effect on Thursday, but this time it's for dust.

Showers and thunderstorms will be impacting Pinal County in the afternoon and early evening and those storms could bring blowing dust into the Valley. So, watch out for gusty winds and reduced visibility during your Thursday evening commute.

After the dust chance, there will be chances for scattered showers and thunderstorms in the Valley on Thursday evening and we'll see chances for more storms on Friday and Saturday too.

As storm chances ramp up, temperatures will drop. Valley highs will fall back into the upper 90s to low 100s starting Friday and stay there through Labor Day weekend.

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2023 Rainfall totals:

Sky Harbor Official Rainfall: 2.94" (-1.81" from average)

Valley Average (Phoenix Rainfall Index): 3.74"
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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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