Now here is an unusual Sense 2.5 mod. HJ200 reports that for users in colder climes, Sense 2.5 weather can be a bit overpowering and even depressing , with constant cloud cover not just in the sky, but also on their device itself.
The weather animations is however one of the stand-out features of Sense 2.5, and he did not want to sacrifice it completely.
The solution was to remove a few cloud from the animation, resulting in clearer skies and a more usable device.
If you are in the same situation his mod can be downloaded from this XDA-Dev thread here. Remember to soft-reset after installation.
Thanks HJ200 for the tip.