It may just be the end of July, however, before you know it, winter will be knocking at the door. If you're lucky enough to have an air-conditioned room, then you can get a "head" start on the cold weather by knitting a hat or a scarf.
Here's a video on how to knit an infinity scarf in just a half-hour! And without knitting needles. I kid you not!
I'm sure your first attempt might not be perfect, but, since it only takes 30 minutes, you can make another one, and another, and another, and perfect it in plenty of time before winter.
If you want to knit the old fashioned way with needles, look for Vogue Knitting: Chunky Scarves & Hats [746.432 VOG] or any of the gazillion beginning-to-knit guides in the 746.43 section.