FORECAST: The hottest October temperatures ever!

PHOENIX – The valley is sizzling with the hottest start to October on record, with scattered showers and thunderstorms sweeping across the higher ground in the heat of the day.

There is a slight chance of brief showers, gusty winds and lightning in the Phoenix metropolitan area through 8:00 tonight.

Our Excessive heat warning remains in effect for the Phoenix metropolitan area and most of central and western Arizona until 8 p.m. Friday.

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

This record-breaking heat wave will continue through the first week of October, when maximum temperatures in the Valley will range from 108 to 113 degrees.

The average highs considered “normal” for this time of year are in the mid-90s.

Today was Phoenix’s hottest day ever recorded in October!

As of 3 p.m., Sky Harbor has reached 113 degrees, breaking the daily record and monthly record of 107 degrees.

This also marks another new record for the last 110-degree day ever recorded in Phoenix. This record previously stood on September 19, 2010, but we have broken this record every day since last week and there is still a chance we could hit 110 again on Friday.

Luckily our nights are getting longer so we aren’t expecting lows of 90 degrees. Nighttime temperatures will dip into the low 80s across the valley, but even that is exceptionally warm for this time of year and new record low temperatures are possible every day this week.

Temperatures will gradually fall during the week of October 7th, but highs could still reach record highs early this week.

With La Niña looming in the Pacific, it is likely that we will continue to experience warmer and drier than normal conditions through the fall and winter months.

Our drought has recently been made worse by the hot and dry monsoon season we just had.

Phoenix recorded just 0.74 inches of rain this monsoon, making it the seventh driest monsoon on record. Our 30-year average (which is considered our normal rainfall amount) is 2.43 inches. However, it is important to remember that this represents a decrease from the previous 30-year average of 2.71 inches (from 1981 to 2010) as the climate in our valley continues to become hotter and drier.

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

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Sky Harbor Official Rainfall So Far in 2024: 4.54 inches (-0.81 inches from average)

Monsoon 2024 Sky Harbor Official Rainfall: 0.74″ (-1.69″ from average)

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Daily rainfall reports from across the valley are available Here.

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PHOENIX IS GOING DRYER – LOWER PRECIPITATION AVERAGES NOW

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

NEW Phoenix average monsoon precipitation (1991-2020): 2.43 inches of rain

Average annual precipitation in Phoenix (1981–2010): 8:03 inches of rain

NEW Phoenix Average Annual Rainfall (1991-2020): 7.22 inches of rain

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View the full 7-day forecast

Arizona Interactive Radar