Was having a chat just now with a pal, sparked by my knack for ending up in the hills (often scantily clad - in running gear, I hasten to add) in pish weather. Has anyone yet achieved an entire round of the Munros whereby every single one was summitted in 360 degree cloud +/- rain/snow at right angles? I suspect the likes of Steve Fallon and Hamish Brown may be able to point to individual ascents of each Munro which met the conditions, but I'll bet they didn't string them together into a round.
It would, additionally, be interesting to think about how long this would take in an average year. Perhaps the ultimate pure boggin round would be to do the above, in a single journey, without a change of underwear. (To add "without a change of socks" would seem inhumane, however.)