Bear in mind an important fact that mosquitoes love extreme (80-90%) humidity and temperature at ~ 60º F or higher.  In order to eliminate them you first need to get rid of humidity indoors (for that you have to eliminate the still water in the backyard) and dry the air. Then, mosquitoes begin to actively lose water and die at a temperature over ~80º F. Controlling humidity is much easier than temperature. If there are so many mosquitoes at your house and in your backyard that you can barely get outside, take some serious measures. We recommend using ready-to-use mosquito traps for outdoor & indoor use such as propane, CO2. H2O, heat traps for killing mosquitoes. Find a perfect one in our review of the 7 best types of mosquito traps.