I present to you the fourth script in a series called Realistic Temperatures – Lower USA, which will enable more diverse and realistic temperatures according on the area you are playing in.
Included are the Southern USA, South-Eastern USA, and South-Western USA (screenshot).
Installing the Southern USA file and starting the game with the map is one way to start a game with a lower USA temperate. Remember that your predictions won't be entirely accurate if you don't have a weather monitor (as in the picture).
Additionally, depending on the locale, this mod allows rain, snow, and hail to occur in additional seasons.
Realistic weather must be implemented. The readme file contains installation instructions. I'm accepting suggestions for areas that I will visit after these current modules' beta period is over.
We're looking on expanding the mod's functionality to include crop calendars, more realistic precipitation totals, and other features.

Thanks to KGriffin