Gwf, you don't know how wrong you are. There's lightning encasing the body of a Creeper, whilst the rain occurs. Without the rain, the creeper would take constant damage if it doesn't explode. Even funnier is the fact that I've had seven charged Creepers coming at me during the rain.
I've found one jockey. Unfortunately this was at the begining of my new world and that along with alot of other mobs destroyed me before I could get away. Jockey+2Skeletons+Hard=DEATH
No, that is in fact a charged creeper. It's got a glow around it. Rain doesn't encase creepers.
Hope you ran like hell, dude. I'd be doing just that.
It is pretty cool looking, though...
Same with me
I was inside, behind a locked Iron door, on the third story. I stayed there until my clock read high noon, just to be certain.