In FSX you could set the weather for different weather stations. For example- EGLL-LPPT, you can pre-set the weather at The destination airport and other points along the flightpath. This will make it so that you wont have to use the weather selector menu to change weather while flying and breaking immersion.
A post was merged into an existing topic: Option to create weather scripts
I moved your post to another topic on the idea of setting weather enroute.