Although it is true that precipitation comes from clouds, not all cloudy days bring precipitation. Some locations tend to have a lot of cloudy weather but not a lot of precipitation whereas other locations have more sunny weather but clouds that are very efficient. Some locations have a geography that frequently allows enough moisture to make clouds but not enough for it to rain very often.
Another consideration is latitude. Many high-latitude locations are so cold that the air saturates easily to make clouds, but the clouds rarely produce more than light drizzle and snow flurries. In our region, we often have cloudy, dry weather during fall and winter because of the dryness of the cold air. In spring and summer, we often have cloudy weather when the Rocky Mountains block low-level moisture from the Pacific Ocean.