Phoenix typically sees its last 100-degree day of the year in early October. But temperatures up to 110 degrees are forecast this weekend, with an excessive heat warning in effect through Sunday.
“Typically we’re done issuing excessive heat warnings by the middle part of September, but the fact that we’re issuing excessive heat warnings in October at this point is pretty unprecedented,” said National Weather Service meteorologist Isaac Smith.
The last few days have brought the hottest October temperatures in Phoenix history. Phoenix is normally done with 110-degree days by late August and has never passed 110 in October before. Tuesday’s high reached 113.
Smith said there’s not much relief in sight, but said temperatures could cool off a little next week.
“After we get through the weekend into next week, hopefully we’re going to be finally done with the 110s,” Smith said.
Smith said temperatures are still likely to be above normal into mid-October. And triple digits are possible for a few more weeks. Phoenix’s latest 100-degree day on record was Oct. 27, back in 2016.
-
2025 was the second-hottest year on record in Phoenix. And climate change made a number of other impacts on Arizona throughout last year. -
Arizona officials will begin reviewing recommendations to keep workers in the state safer in extreme heat after a task force submitted findings to the agency. -
We all know that Arizona is hot. Too hot, oftentimes, for workers to safely spend long periods working outdoors — or even indoors where there’s not good air conditioning or air flow. -
The calendar says it’s winter, but the weather says it’s spring. Even by Phoenix standards. -
Arizona has never had statewide regulations to protect workers from extreme heat. Neighboring California does have a workplace heat safety standard. A new study says California's policy saves lives.
