Summer performance tires are great in the rain. It’s mostly about the temperature. Rubber compounds are designed for optimal use in particular temperature ranges. Summer tires will be ideal above 40F. Winter tires will be ideal below freezing, and of course the winter tread pattern and siping helps in snow and ice. For me I want the best tire for the season. I put on winter tires here in Maryland even though we only get a few days per year of snow. My winter tire use is about the temperatures first, and icy conditions second, and snow third. My summer tire use is about warm dry conditions first, and rain conditions second.
Awesome. That's really helpful information. Thanks!