Freezing warnings for some sites from A to Z!
Phoenix – Nice fall weather settles in Arizona!
Valley highs dropped into the upper 80s to low 90s and will remain there again on Friday.
Our overnight temperatures are also dropping.
Lows will drop into the 60s across much of the Phoenix metro area and we may see some outlying areas in the 50s by sunrise Friday morning.
North, first Freeze warnings This season runs all night until 8 a.m. with lows dropping into the 20s in places like Flagstaff and Grand Canyon Window Rock. These advisories extend along the Mogollon Rim and into the White Mountains as well, where lows will dip into the 30s.
However, this calm will be short-lived.
High pressure will build again over the weekend, pushing valley highs into the mid-90s on Saturday and back into the 100s on Sunday.
Phoenix could see a three-day high in the low 100s before our next dose of cold air arrives toward the middle to end of next week.
On average, the last triple-digit day is around October 5, but we’ve seen triple-digits as late as October before. It was last recorded on October 27, 2016.
Phoenix has now had 126 days this year with temperatures of 100 degrees or higher. This is the sixth on record. The average number is 111 days, and the all-time record is 145 days, dating back to 2020.
Monsoon season summary 2023:
The 2023 monsoon officially ended on September 30, and will be the driest on record with only 0.15 inches of rain falling at Phoenix Sky Harbor.
The previous record was set in 1924 when we measured 0.35 inches of rain.
The 2023 monsoon was also the second driest monsoon on record in all of Maricopa County.
The monsoon has been very hot too.
Phoenix reached 110 degrees or higher on 55 days this year, breaking the old record of 53 days set in 2020.
Phoenix has reached 115 degrees or hotter on 22 days this year. This is also a new all-time record, surpassing the previous mark of 14 days set in 2020.
When it comes to overnight temperatures, Phoenix had 35 days this year with lows in the 90s. The previous record was 28 days, set in 2020.
September 10 this year also marked the last day of any year where it hit the lows in the 90s. Previously the record was September 7, 2019.
Total rainfall for 2023:
Official rainfall in Sky Harbor: 3.03 inches (-2.54 inches from average)
Valley Average (Phoenix Precipitation Index): 4.17″
Daily rainfall reports can be viewed from across the valley here.
Phoenix is getting drier – average rainfall is now down
Average seasonal rainfall in Phoenix (1981-2010): 2.71 inches of rain
New average monsoon rainfall for Phoenix (1991-2020): 2.43 inches of rain
Average annual rainfall in Phoenix (1981-2010): 8:03 inches of rain
New average annual rainfall in Phoenix (1991-2020): 7.22 inches of rain
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