[smt88]

> without temperature extremes in summer or winter

That's going to limit your options tremendously (in the US at least). Parts of Southern California would fit, if desert is an acceptable type of nature for you. The cities are expensive, but smaller towns aren't always.

What are "extremes" for you, anyway? Are hot summers OK, but cold winters are not? Vice versa?

The only place I have personally been with lots of nature and mild weather year-round is Guatemala. Perhaps somewhere in the Mediterranean region?

[yogi123]

Let's say <90 F in summer and >30 in winter :). Open to suggestions with weather extremes as well. Thanks!

[DoreenMichele]

Some parts of Western Washington might fit your criteria. Maybe Western Oregon as well and Northern California. I mean north of the Bay Area and towards the coast -- temps are more extreme the further inland you go. Large parts of Northern California, Oregon and Washington have a lot of nature -- national forests, etc.