Cold temperatures can make paint brittle

https://southwestcollisionok.com/media-room/#/media-room/article/339113/auto-body-repair-the-paintless-dent-repair-process-and-its-advantages

Cold temperatures can make paint brittle, increasing the likelihood of cracks and chips when impacted by debris or even heavy snow accumulation. Protecting your vehicle with a good wax can help mitigate these effects.