I likr riding solo, and I like riding with particular groups; my only limitation with groups is that if I'm unfamiliar with any of the riders, I'll hang in the back, and keep a bit of distance.
So my limitations are primarily weather related:
Rain - if I'm already out and it starts raining, I'll keep going, but if it's already raining, I'll opt to cage it.
Wind - hmmm, sustained winds over 25 mph, not my thing. Very common here April to June.
Snow - no chance we'll get it but also no chance I'd ride in it.
Heat - hmmmm, over 100, kinda miserable with the humidity, so I'd pass.
Cold - colder than 38-40 (I have never found good winter gloves that I like).
Fog - if visibility is under about 2 miles (esp early morning hours) I'll pass.
Night - no issues here. I like night riding.