Yeah, I have the same problem in the summer. We do have extreme winters, but very mild summers with lots of dew. It gets down into the low 50's pretty regularly at night, and then 70's and maybe 80's during the day. You might look towards the Wesco Romeo, but water will get in through the goring, and to a lesser degree through the welt if you start walking through puddles, or even too long in wet grass (hours).

If you want something taller, Nicks makes a Chelsea. There are plenty of other GYW Chelseas, but those are the only narrows which is a requirement for me. Others are available from Grant Stone and RM Williams. I'm pretty sure RM Williams has some that are more weather resistant, as does Allen Edmonds (hard to recommend AE at this point), but weather resistance usually compromises repairability. So make sure to research.

There aren't a lot of properly welted romeos, unfortunately. I know one of the Canadian boot makers makes a romeo, but if I remember correctly, it's actually taller like a Chelsea. Georgia Boots makes a lot of romeos, but I don't think any are welted, and if they are, they're probably not going to last.

I'm more likely to just own it, and go out in a Quoddy camp boot, or some sport mocs/camp mocs. I'm dreaming of someone making a 4" romeo moc with a wrapped sole, at this point. I want a slip on that protects my ankles from the briars and nettles.

I think Quoddy released a waterproof hiker, recently, but I lost interest when I saw they don't offer either a 13, nor a narrow, in that model.

I do tend to keep around something replaceable that is more weather resistant. Right now that's some junky waterproof romeos from Huckberry, and some hiking shoes from La Sportiva.

Oh... you might look into Crispi. They're known for hunting boots, and I know the heavier duty stuff is repairable (though not welted). I have a pair of insulated Briksdals for the winter, to hike with my dog through the snow. I know they have some lower and lighter stuff, though the soles tend to be very rigid. I don't know if you compromise repairability for the lighter duty stuff, but their customer service is very helpful.

Sorry, I've searched a lot, and have probably come across some stuff that would suit you. But I have really weird long, narrow feet with a forward arch and wider toes. So I tend to discard things that won't fit, and forget about it.

Oh, and Danner, definitely check out Danner. Not everything they make is welted, but there's a lot of variety, and a lot of it waterproof or resistant.