The fire season has unofficial start and end times. The average would be from early May, through late October. It s possible for it to begin or end earlier or later, depending on daily weather conditions. In fact it is the daily weather that really determines whether or not wildfires rage out of control. The most critical weather condition for wildfires is low humidity.
Strong winds are a real hazard, as they can spread the fire great distances.
High temperatures are not the most important weather element for wildfires, but they do make it harder on the fire fighters. Any of those things can set off one of our most dangerous natural disasters. So, as long as there is dry vegetation and there are still hazards that can initiate wildfires, then our wildfire season is not considered over. Crews remain on high alert, and fire season continues until the weather patterns change substantially. Southern California fires can extend the season by a few weeks, depending on the severity of their local Santa Ana winds.