Pet Water Bowl is a mod for Stardew Valley that will water the pet bowl on days that it rained, snowed or stormed. 
It can also be used with an Iridium Sprinkler, which is a form of precipitation that occurs when the temperature rises and the air becomes cooler and drier than the average temperature. 
This mod can be configured to use the Sprinkler in different ways. The first option is to use it for all types of precipitation, while the second option is to use it for specific types of precipitation. This mod also has an option for how the game should handle snow, which is a form of precipitation that occurs when the temperature rises and the air becomes cooler and drier than the average temperature.