Let’s see… I believe it was 62 days in a row where it rained at least once in a 24 hour period. I was working in Scotland for Outward Bound at the time so pretty much most of those days were in a tent. Let me rephrase that - a soggy alleged tent… on muddy ground. We came to one stream, all of us got in it, boots on and all and washed the mud off our boots and legs (it was a squishy kind of mud and you’d get it up the back of your legs either from your boot or from the person walking behind you if they were too close). Actually, since it wasn’t freezing cold it wasn’t that bad. You sort of get used to it. Once you give up trying to stay dry and unmuddy the stress is off and things are fine.
The scariest rain storms I have been camping in were (1) taking adjudicated youth canoeing across the state of Florida. Regular as clockwork thunderstorms about 2-3pm. Aluminum canoes. Lots of lightening. (2) above tree line in Austria (near the German Border) when I worked for Hinterbrand Lodge in Germany (DoDDS), a really nasty hail and lighting storm came through. Winds were, I found out later, around 60 mph. We had to put our climbing helmets on as the hail was a huge (and all of us ended up with bruises) and as much as we would have preferred to hide under our packs, we had to crouch on them due to all the lightening strikes. That hail did around 1.2M (that would be dollars, not marks as I read about it in the Stars and Stripes some time later) in damage when it Munich.