The duration of mosquito season varies depending on the region and temperature. Mosquitoes become active at temperatures above 50 degrees Fahrenheit and require temperatures above 70 degrees Fahrenheit to thrive. They prefer moist, humid environments, and warm areas with heavy rainfall may see increased mosquito populations and activity. Here are some general guidelines for mosquito season in different regions of the US:

• Gulf Coast, Florida, and Hawaii: February - November
• South and Southwest: March - September
• Mid-Atlantic, Midwest, and West: April - September

However, since mosquito activity is closely linked to temperature, the actual mosquito season can vary greatly from one region to another and even from one year to the next. The warmer the climate, the earlier the mosquito season starts and the longer its likely to last. In some areas of the US, residents may not see the first mosquito until May or June, while others will have to start dealing with them as early as February. In the extreme South and Hawaii, mosquito season has been known to last throughout the year.

As the weather begins to cool, mosquito activity will decrease, and non-hibernating mosquitoes will begin to die off as the temperature approaches the 50° F mark, while the hibernating species will start to seek winter refuge in hollow logs, abandoned animal burrows, and other convenient hiding spots. The first frost is usually a reliable sign of the end of mosquito season.