North and south Arkansas are VERY different geography wise and weather wise.
The Ozarks are north and west and are FAR more temperate than the flat south agricultural regions, or ANY part of Arkansas close to the Mississippi River.
South Arkansas in the summer would be miserable for someone who likes Washington state weather.
Start looking for example around Mountain View, then keep expanding out.
Also the area around the Buffalo river is worth checking out.
But just know that all parts Arkansas and the South will have days that are hot and humid. Inescapable.
Arkansas has beautiful areas and LOTS of available land.
Avoid Texarkana, HotSprings and Little.Rock. stay north of there, by a lot.
Knew folks who farmed in NE AR.
Salt of the Earth people.
Ditto and staying north of those cities. Or east.