Rain can have an effect on a target as it is flying so, yes it might have something to do with it. Crappy weather can also make a difference in how you see a target as well
I shoot in a tournament on friday and did 88/100. Tough course in my opinion but I can't complain much. I did about normal for me but the winners were in the mid to high 90's.
Just got back from shooting 200 sporting targets for practice - mixed results - I suspect the heat getting over 90 the second go 'round didn't help any. Only two target types stumped me today - which is better than the typical 3 or 4 - the other misses were pure brain farts on concentration - which will take focus, since I have tournaments the next two weekends
Still beats sitting around watching grass grow - or worse - mowing it!