Here is the eleventh script in a series for FS25 that will enable more realistic and varying temperatures based on the location you are playing in: Realistic Temperatures – Northern Ireland.
For instance, installing the Northern Ireland file and then starting your game with the map is how you start a game with a Northern Irish map.
Remember that your predictions won't be entirely accurate if you don't have a weather station, as seen in the screenshot. One is available for purchase under Tools in the Construction menu. A few modifications are also available for a greater range of them.
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 more detailed information and installation instructions. Read on!
Requests are being accepted! I'm still investigating if it's possible to alter the seasons and months for South America!

Thanks to KGriffin