El Niño Intensifies as Arizona Monsoon Season Ends
The 2026 monsoon season in Arizona, which officially ends on September 30, has been drier than usual, with Phoenix Sky Harbor International Airport recording only 1.41 inches of rain compared to the seasonal average of 2.43 inches. Despite this, isolated to scattered showers are forecast for eastern Arizona through midweek, with a 30% chance of rain in Phoenix on Wednesday night. Meanwhile, meteorologists are closely monitoring the intensifying El Niño pattern, which was declared on June 11. This climate phenomenon, characterized by warmer Pacific Ocean surface temperatures, is expected to bring increased atmospheric moisture to the Southwest, potentially leading to a wetter fall and winter season.