Phoenix, Arizona – A shift in the weather pattern will bring cooler temperatures and the first meaningful rain chances in days, with changes beginning as early as Thursday and peaking by Saturday.
According to the National Weather Service in Phoenix, a low-pressure system moving in from the eastern Pacific will push moisture into the Desert Southwest late this week. Cloud cover will increase by Thursday, marking the start of a cooling trend that brings temperatures closer to seasonal norms by the weekend.
Rain chances rise sharply Saturday into early Sunday, with probabilities between 20 and 40 percent across lower desert communities including Phoenix, Mesa, and Casa Grande. Higher terrain areas such as Prescott and Flagstaff could see chances nearing 50 percent.
The incoming system may also impact travel across portions of Interstate 10 and Interstate 17, where brief showers could create slick roads and reduced visibility. While rainfall totals and timing remain uncertain, conditions will turn noticeably less dry.
Residents should prepare for changing conditions by the weekend, including cooler temperatures and the potential for spotty rain. Additional updates are expected as the system approaches and forecast confidence improves.
