Phoenix woke to clear skies and temperatures in the low 60s Tuesday, with a sunny afternoon headed toward 86 degrees. Light southeast winds should keep the day calm, and there is no rain in the immediate forecast.
A Warm Start, Then Two Rain Chances
Tuesday night stays mostly clear with a low near 60, while Wednesday remains mostly sunny and reaches about 86 degrees. Thursday will be partly sunny and just as warm, but clouds and moisture will increase late in the day, according to the National Weather Service in Phoenix.
The first rain window is late Thursday night into Friday, when showers and thunderstorms become likely across the Valley. A Monday forecast from Hoodline also noted the late-week shift; the current outlook's additional concern is a possible second wet period Sunday, with localized minor flooding possible from heavier downpours.
Cooler Weekend Forecast, With Rain Timing Still Uncertain
Friday looks much cooler, with a high near 76 and an 80% chance of showers and thunderstorms. Rainfall could total roughly a quarter-inch to half an inch, with heavier pockets possible, according to KJZZ, so drivers should avoid flooded roads and washes if storms strengthen.
Saturday's Halloween forecast calls for partly sunny skies, a high near 77 and a 30% chance of rain, followed by a 50% chance of showers Saturday night. Sunday appears to be the wettest and coolest day of the weekend, with showers and thunderstorms likely, a high near 71 and another quarter-inch to half-inch of rain possible.
October Rainfall and Floodplain Maps
For longer-term context, the National Weather Service’s 1991–2020 climate normals put Phoenix’s typical precipitation from October 1 through October 26 at 0.47 inches, according to its Phoenix climate report. Residents can check the Maricopa County Flood Control District’s online maps for current and pending FEMA floodplain maps. Those maps show established floodplain areas rather than predicting this storm’s impacts.
Rain chances may linger into Sunday night, while much of the area dries out by Monday; temperatures are expected to be near 70. No watches, warnings or advisories are listed for the Phoenix area, but outdoor plans from Friday through Sunday should come with a backup plan.
