I made a fa18 formation flight training mission so you don't have to.
You can change the weather in the mission editor if you want.
If this helped you out, subscribe to me on youtube:
https://www.youtube.com/channel/UCNijtw5S2Op9sHXrL9kujjg
To use simply
1: download the mission
2: Open C/users/your name/saved games/dcs/missions
3: if dcs is downloaded to another drive (D or E or F etc.) just look for dcs/missions
4: drag the download into this folder and you should be good to go
FA 18 formation flight training.miz