The PlexiDor is the best pet door for keeping weather outside and not allow water to enter the house. All PlexiDor models have high quality weather seal around the panels, and the panels close tightly and quickly to protect from wind, rain, snow, chill, and heat.
Regular rain will not enter through the PlexiDor cat door or dog doors.
If you live in an area with regular downpours – or have a pet who likes to lie through the door, propping the panels open with their body – you may want to invest in an awning. The awning also provides shade on hot days.
If there is extreme weather, for instance floods or hurricanes, lock the pet door and attach the security plate.