I carry a G19 or G26 "almost" exclusively from the beginning of sweatshirt season to the end of it, there are exceptions. I can hide either under a sweatshirt. I can hide the G26 under an untucked button shirt but not under an untucked T-Shirt.
So, in the summer it's pretty much the P238 or LCP in that order of preference because of the bedtter sights and trigger on the P238. Sometimes, even in sweatshirt season, like when going to a Christmas party, I'll pack the P238 in an IWB just becasue I have a sport coat or suit jacket on and it hides well under the jacket @ 4:30 to 5:00.
I don't feel under gunned with any of them, but I prefer the P238 to the LCP when I can hide it. The LCP is the gun I carry when I can't hide "anything" bigger. A G19 or G26 it isn't, but it's better than spit.