All the cheat codes in Saints Row: The Third must be entered using your cell phone. You need to press the "Back" button to bring it up, and then select "Extras" and then "Cheats". After that simply enter in one of the following cheat codes to activate the relevant cheat. Note that when you do activate a cheat, automatic saving will be disabled as well as the ability to earn any Achievements. You can manually save the game, although this is not recommended as it will impact your Achievement earning ability and may bring about other issues!

Cloudy weather: overcast

Rainy weather: lightrain

Sunny weather: clearskies

Very rainy weather: heavyrain