The 2024 Arizona wildfire season is an ongoing series of wildfires that have been burning throughout the U.S. state of Arizona.
Historically, while peak fire times were from June to July before monsoon season, wildfires now occur at any time of year. Wildfire conditions are influenced by heavy drought and dryness in the state, but snowmelt in the mountains leads to vegetation growth. With decreasing precipitation in spring, fires tend to start earlier. Monsoons affect fire conditions, with above-average monsoons hindering fires and below-average allowing them to spread. Dryness common in Arizona quickly dries out vegetation, allowing dangerous fire conditions.
In the winter from 2023-24, above-average precipitation lead to vegetation growth, especially in Maricopa and Pinal counties, providing fuel for the fires. This contributed to a 54% increase in wildfires in Pinal County from last year. Above-average spring temperatures led to an early start to wildfires in Central and Southern Arizona, but snowpack in the northern portion of the state held off fires. A late, below-average monsoon and warm, dry conditions continued into fall and winter months, allowing fires to last late into the year. September and October were some of the hottest months in Arizona. Prolonged warm and dry conditions that lasted into December contributed to the Horton Fire.
The dry vegetation was influenced by a drought that had come from previous years. The number of fires and acreage had increased since previous years, including a 15% increase of wildfires since 2023.
The following is a list of fires that burned more than , or produced significant structural damage or casualties.