I was invited to a hog hunt once and was warned that we might be a storm. Oddly, the rifle I practiced with and knew the best that year was my T99 Arisaka with open sights. It rained hard on the day we hunted. The friend and his son had fogging issues with their scopes. I was the only one that could hunt that day.
I'll add for fun that after the hunt, we stopped at a McDonalds. I was in line and noticed an employee standing next to me with a mop. Apparently, wherever I was standing, I was leaving a large water puddle. I wasn't prepared for this hunt and used Korean War era clothing with wool. No rain poncho, just the field jacket. I was soaked to the skin but warm.