If I end up moving to the beach later this summer, I'll get summer tires. It does get very cold there, but rarely any snow or ice I have to have A/S tires if I stay here, though.
It looks like 185/60 is a safe replacement for 175/65.

 

Used 4 new General Altimax Arctic 185/60-15 ( Q-rated ) with studs from November to April with no issues . Replaced with 4 new General Altimax RT43 175/65-15 (H-rated ) A/S . Were $66 each before tax . The 185/60-15 had minimal impact on F.E..