SDVWM (formerly SDVMM) is a mod for Startdew Valley that adds weather effects and a day/night cycle to the game. The mod can be used on any map and allows players to add a variety of weather effects and a day/night cycle to the game.

As players explore the world, they will encounter different weather effects, such as snow, rain, fog, and lightning.

There is also an option to set the time when the weather effects are applied to a mob.

When the day/night cycle is enabled, the sun will rise and set every day. The sun will rise at the same time in the morning and set at the same time in the evening.

When the day/night cycle is disabled, the sun will not rise and set.

There is an option to enable or disable the day/night cycle.