Here’s a picture from Catch Magazine whose caption might be " Rain - what rain?
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lol.. on a day when it was raining and I was hesitant to go fishing.. my wife looked at me and said.. the fish dont mind the rain.. why should you??
MacFly
That is a very cool picture. If I was that guy-I would frame
it and put it on the wall.
Some of the best fishing is in the rain . Little rain is good
and if you are ready for it (jacket, hat…) it can be
very productive.
Peter
A while back when I was heading for the river, my wife said “its snowing and you are going fishing?”. Heck yes I replied, someone needs to feed the fish, besides it doesn’t snow under water. It turn out to be a pretty good day.
I might draw the line at snow.. but you do have a point.. it dont snow under the water.. 
If one dresses for the weather it doesn’t matter to me if it rains or snows.
true.. :-)..
MacFly 
Yep, thats right. As long as you ready for the weather
you are going to have a good time. Also not many
people fish in “bad” weader so for the most part you
will have the place to your self.
When I go to Sierras, I take everything with me-light
and heavy jacket under pant, rain gear, shorts …
that way Im ready.
Peter
You have got that right Peter. I have been to Bishop when the temps were around 90º and 20 miles away up at Bishop Creek the temperature was around 30º. As the BSA states “Be prepared”.