This kind of weather makes me want to curl up in my warm bed with my fleece socks on, a nice cup of tea in one hand and a book in another. It makes me want to just "chill."
The word "chill" can be used to mean multiple things : to hang out (intransitive verb), to calm down (verb), someone who is very relaxed and easygoing (adjective), or sensation of coldness (noun).
When I say I want to "chill" because of the rainy windy weather I mean I just want to relax, hang out and do nothing.
This is the same meaning as the slang, chillin'
You can say to someone , "I'm just chillin' at home" or "I'm chillin' at my friend's place"
**If you have the energy to learn another phrase with the word "chill", the phrasal verb "chill out" is a good one. You might have heard it in movies before. It means to take it easy, calm down. For example, if you're very worried about a work presentation, your spouse may say, "You need to chill out! You'll be fine!" This means he/she is telling you to relax, calm down, don't get to excited. Everything will be OK!