PHOENIX – A high pressure area is building up and causing temperatures to skyrocket!

A Warning of excessive heat now applies to the valley until Sunday 8 p.m.

So we are in ABC15 Weather Action Mode as a reminder to do something in these dangerously hot temperatures. Drink plenty of fluids, spend as little time outside as possible in the afternoon, and never leave children or pets in the car, no matter how quickly you have to run an errand.

Phoenix officially recorded over 43 degrees today, which is unprecedented for this time of year. The last day Phoenix ever recorded 43 degrees was September 19, 2010 to date.

Since 3 p.m., the temperature in Sky Harbor has risen to 45 degrees, breaking our previous record of 42 degrees set in 1989.

Over the next few days we will continue to experience highs of between 43 and 46 degrees, breaking records every day until early next week.

Our nights are getting longer, so we don’t expect lows below 32 degrees. Nighttime temperatures will drop to 27 to 29 degrees throughout the valley, but even these temperatures are exceptionally warm for this time of year and could set new daily records.

Temperatures will gradually drop next week, but triple-digit temperatures are still forecast for the entire first week of October.

Our drought has been exacerbated in recent months by the hotter, drier monsoon we’ve been experiencing. There’s less than a week left until the rain starts pouring down before monsoon season officially ends on September 30th, and the chance of rain is zero across all of Arizona.

So far this monsoon season, Phoenix has only received 0.74 inches of rain. Our 30-year average (which is considered our normal rainfall amount) is 2.43 inches. But it’s important to remember that this is a decrease from the previous 30-year average of 2.71 inches (from 1981 to 2010) as the climate in our valley continues to get hotter and drier.

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Official precipitation in Sky Harbor 2024 to date: 4.54 inches (-0.73 inches from average)

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Daily precipitation reports from across the valley can be found Here.

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PHOENIX BECOMES DRIER – NOW LOWER AVERAGE RAINFALL

Average monsoon rainfall in Phoenix (1981-2010): 2.71 inches of rain

NEW Average monsoon rainfall in Phoenix (1991-2020): 2.43 inches of rain

Average annual rainfall in Phoenix (1981-2010): 8:03″ Rain

NEW Average annual precipitation in Phoenix (1991-2020): 7.22 inches of rain

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View the full 7-day forecast

Interactive Arizona Radar