This was present in Oblivion and in Fallout 3. Although it was more fitting in FO3 imo, because there there had actually been nuclear bombs going off...
Oblivion example: http://xbox360media.ign.com/xbox360/image/article/695/695763/the-elder-scrolls-iv-oblivion-20060314020608317.jpg
Fallout 3 example: http://blog.al.com/techcetera/2008/06/fallout3megatoneexterior.JPG
A few mods came out that changed this. For Oblivion, a great example is the mod "http://www.tesnexus.com/downloads/file.php?id=18305".
Here's some comparison images of what it does:
http://i275.photobucket.com/albums/jj317/Brumbek/All%20Natural%20Oblivion%20Mod/AN-Tints-IC-Comparison-Vanilla.jpg
http://i275.photobucket.com/albums/jj317/Brumbek/All%20Natural%20Oblivion%20Mod/AN-Tints-IC-Comparison-ANDefault.jpg
http://i275.photobucket.com/albums/jj317/Brumbek/All%20Natural%20Oblivion%20Mod/AN-Tints-Chorrol-Comparison-Vanilla.jpg
http://i275.photobucket.com/albums/jj317/Brumbek/All%20Natural%20Oblivion%20Mod/AN-Tints-Chorrol-Comparison-ANDefault.jpg
In my opinion, All Natural makes things look much more natural and good-looking. The sky is only very rarely "nuclear bright" in real life. But what we should ask ourselves instead is what we think looks the best. What would we like to have most in Skyrim?
So how are the skies in Skyrim then? The skies in Skyrim have followed the same path as vanilla Oblivion and Fallout 3, often overly bright. A few examples are:
http://bulk2.destructoid.com/ul/199017-/MountainForestPath-noscale.jpg
http://skyrimguild.com/wp-content/uploads/2011/02/SkyrimTrailer3.jpg
http://cdnstatic.gamesas.com/akqacms/files/tes/screenshots/LakeMountains_wLegal.jpg
http://skyrimguild.com/wp-content/uploads/2011/02/SkyrimTrailer6.jpg
So the final question is, do you think some skies like these in Skyrim should be less "nuclear bright" (less overly bright, as in almost completely white)? Do you think the skies would look more natural and beautiful then?
I personally think so. What do you think?