No weather after departure

I am not sure if I am doing something wrong, but once I have taken off, I will usually be surrounded by clouds or weather, but soon after, usually once I reach my cruising altitude, so within 30 minutes, I will enter completely clear skies, possibly a little bit hazy. This happens at any location I depart from. Even after weather updates or restarting FSRealWX, I still get no weather. Sometimes I get pressure readings on landing, but never any clouds.

Thanks for the reply, I am using FSX, are you saying the issue could be the setting 'Rate at which weather changes over time'? I will check now what the setting is.

I cant believe that I have missed this setting for so long, sorry for wasting your time, that setting was indeed set to 'no change'. Sorry again and thanks for pointing out the issue.

OK, sorry, by the picture I thought it should be set to medium. are there any other possible causes?

I changed the setting back to 'no change', but after doing another flight, I still end up flying into completely cloudless skies after around 30 minutes. It is like there is a near straight line of clouds behind my aircraft, where the clouds stop and this is the same on every single flight I do. Other than this setting, is there anything else you think might be causing this? Thanks

To try to see if it was an FSX problem, I deleted my FSX.cfg file and tested it on default settings, but still nothing seems to be working. I would appreciate it if you could advise on possible solutions. Thanks

SilloAdmin, I was wondering whether you had any thoughts regarding the cause of this, as I have not been able to fix the problem and have spent several days trying to, so it would be great if you would be kind enough to suggest possible causes of the problem. Thanks.