Hi ;)
I am in great admiration for your mod. It's a really great job. As for the weather and the impact of latitude on the environment. Changing the geographic latitude will affect the angles of the sun's rays and thus the length of the shadows. Unfortunately, this change itself has no effect on the max and min temperatures and the weather itself.
I am currently working on the weather for FS22 for Poland based on the data of the metrology institute. If you have any questions about defining the weather in the enviroment file, write to discrod I invited you to my friends :)