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MOST ACCURATE FORECAST: Excessive Heat Warning for Monday as temperatures slowly cool down

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PHOENIX — Our latest 110-degree day ever on record happened Sunday with our high of 113 degrees at Sky Harbor Airport.

This heat wave is shattering records and will continue as Valley highs top out between 108 to 111 degrees through Monday.

Average highs, which are considered "normal" for this time of year, are in the mid-90s.

Our Excessive Heat Warning is in effect through 8 p.m. Tuesday for the Phoenix metro area, and 8 p.m. Monday for western and southwestern Arizona.

So, we remain in ABC15 Weather Action mode as a reminder to take action to stay safe in these dangerously hot temperatures. Stay hydrated, limit time outside in the afternoon hours and never leave kids or pets in the car no matter how quick the errand.

Thankfully, our nights are getting longer, so we do not anticipate any 90-degree lows. Overnight temperatures will drop into the upper 70s to low 80s across the Valley, but even that's exceptionally warm for this time of year and new record-warm lows are still possible.

Temperatures will gradually drop this next week but highs could still be record-setting each day. We're not likely to get out of the triple digits until next weekend at the earliest.

With La Niña building in the Pacific, it's likely that we'll continue to see warmer and drier-than-normal conditions through the fall and winter months.

Our drought has been getting worse lately with the hot and dry monsoon season we just had.

Phoenix only picked up 0.74 inches of rain this monsoon, which ties for the seventh driest monsoon on record. Our 30-year average (which is considered our normal amount of rain) is 2.43 inches. But, it's important to remember, that is a decrease from the previous 30-year average of 2.71 inches (from 1981-2010) as our Valley climate continues to get hotter and drier.

With an overall average temperature of 98.3 degrees, Monsoon 2024 was also the hottest monsoon ever recorded in Phoenix. That breaks the previous record of 96.9 degrees which we just set last year. All of the top 25 hottest monsoon seasons have occurred in the last 25 years.

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2024 Sky Harbor Official Rainfall to date: 4.54" (-0.89" 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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