You can close the console by pressing Control + Shift + C again or hit escape if the box is in focus. They're more advanced cheats normally used to debug the game. For nearly all of the following cheats, you must then type testingcheats on to enable the ability to use them. To use cheats in The Sims 4, press Control + Shift + C to toggle the console on and off.
Note that to fully take advantage of these you will need a mod. Here's a guide to cheating in Seasons and what you'll need to change the weather. The Sims 4 Seasons Expansion includes some unique cheats in the form of weather control, and of course it's possible to cheat your skills. The Sims 4 Seasons Cheats Control Weather and Change the Season
