The weather in Stockton in September is hot. The average temperatures are between 16°C and 33°C. Usually the days in September are hot while the nights are a bit cooler.
There shouldn't be any rainy days in in Stockton during September. Having said that, the days are very hot in September so hanging out outside is more recomanded during the after noons and evening time.
Our weather forecast can give you a great sense of what weather to expect in Stockton in September 2025.
If you’re planning to visit Stockton in the near future, we highly recommend that you review the 14 day weather forecast for Stockton before you arrive.