Weather
Arizona Weather This Week: Widespread Rain Expected by Wednesday Oct 21
Flagstaff, AZ – Northern Arizona residents are facing several days of unsettled weather beginning Sunday, October 18, as scattered rain showers and isolated thunderstorms continue across the region, w
By Lena Wood · 2026-10-18T11:00:06.259Z
Flagstaff, AZ – Northern Arizona residents are facing several days of unsettled weather beginning Sunday, October 18, as scattered rain showers and isolated thunderstorms continue across the region, with another system expected to bring more widespread rainfall by midweek.
According to the National Weather Service in Flagstaff, light showers were already moving across much of Northern Arizona early Sunday morning. Additional showers are expected throughout the day and into the evening, with a slight chance of thunderstorms.
Rain and Thunderstorm Chances Continue Sunday Communities including Flagstaff in Coconino County, Prescott in Yavapai County, and surrounding areas could experience periods of wet weather throughout Sunday.
The National Weather Service forecast shows precipitation probabilities varying considerably across the region.
Flagstaff has approximately a 55% chance of precipitation Sunday, while Williams is near 41% and Prescott is around 44%.
Rain chances are generally lower in portions of western and northeastern Arizona.
Although thunderstorms are possible, the forecast primarily emphasizes scattered showers and isolated thunderstorm activity rather than widespread severe weather.
Another Round of Rain Expected Monday Rain chances will continue Monday, October 19, particularly during the afternoon.
The forecast indicates precipitation probabilities near 41% around Flagstaff, 38% near Williams and 40% around Prescott.
Residents traveling along Interstate 17 and Interstate 40 should remain alert for wet pavement and changing visibility during passing showers.
The unsettled weather pattern is expected to continue through much of the workweek.
Forecasters anticipate another weather system arriving around midweek, potentially producing more widespread wetting rainfall across Northern Arizona.
The additional moisture could bring another round of damp conditions to communities that have already experienced showers over the weekend.
Residents planning outdoor activities, regional travel or construction work should monitor changing forecasts throughout the week.