Hi Tug,
We've fished in the rain (winter season) a number of times last year and we enjoyed it for several reasons:
1. No one else was out except for some bass boats and they looked miserable....to think I did that before.
2. soaked bait or trolled and head into the cabin to make coffee or lunch - you're not sitting outside in the elements.
3. If throwing plugs, the rain gear made it a bit cumbersome.
4. I have dri-dek in the cockpit plus we wore rubber boots. I remember it being somewhat slippery. Be sure to wear something that can grip the cockpit sole.
5. If fishing alone, wear your lifejacket at all times.
On one ocassion, the rain was light and steady all day. Nothing the bilge pump couldnt handle 1/2-1" at most. Another ocassion was off and on heavy rain+winds. Again, not an issue. Just be sure your wipers are good when running. Rain-X helps.
I would caution, however, to call it a day if there is a lighting storm. Graphite rods should be thrown into the cabin and you should head in.
Hope that helps & Good Fishing.