We just endured a 1/2 day of rain in our ORV 25RDS. While I didn't find the rain loud I did notice it. One of the things that can make or break the noise is skylights and vents. We have a skylight in the living area and vent in the living/kitchen area. Those two items probably made it a little louder inside than if they weren't there. I could here the rain on the vent/skylight plastic more than on the roof. Also the slide was the noisiest part in the living area.