When you want to describe a cloudy or gloomy day, the phrase "is overcast" might come to mind. However, there are many other words that can be used as synonyms to describe the same kind of weather. You might use the phrase "is cloudy" to suggest a similar climate, or say "is dull" if you want to emphasize the lack of brightness outside. "Is murky" could be used to describe an overcast day with a sense of foreboding or uncertainty, while "is gray" might suggest a particularly dreary scene. No matter which synonym you choose, you'll be able to describe the type of day you're experiencing with accuracy and flair.