Cat-and-dog weathers refers to heavy rain accompanied by strong winds. It is a colloquial expression that may not be familiar to everyone. Antonyms of cat-and-dog weathers would be weather conditions that are pleasant and predictable. Some antonyms for cat-and-dog weathers include sunny, clear, calm, and mild. These are the types of weather conditions that people usually prefer since they provide the perfect environment for outdoor activities. During these antonymic weather conditions, people can enjoy the sunshine, warm breeze or cool temperature without having to worry about heavy rain, strong winds or other extreme weather occurrences that may disrupt their plans.