While I don't store stuff in the garage I do projects there often and this gets the job done
https://www.amazon.com/MIDEA-MAD50C1YWS-Dehumidifier-Reusable-basements/dp/B07NRC42PJ/
If you're garage door faces the afternoon sun i'd also suggest some radiant barrier for the door all you need is the material + utility knife + measuring tape and it will help keep the temps down.
Unfortunately the only ones that actually work start around 200-250. I got this one but anything similar or larger is what you want. amazon