Want to learn How to Make it Rain in Minecraft? You’re in the right place! It’s actually pretty simple to make it rain in Minecraft. While playing Minecraft Classic mode, all you need to do is press the F5 key on your keyboard and it will bring the rain storms! Don’t believe me? Check out this quote from the Wiki:
In early Classic, rain was introduced to the game to test out this feature. It was purely for cosmetic purposes at that time. The mechanics were simple, only testing if there is a block above to shelter the rain. It could be toggled on and off in-game using the F5 key. This feature later vanished when Indev was introduced.
After Minecraft Beta 1.5′s announcement, a preview video was uploaded onto the TeamMojang YouTube channel showing weather and other future updates. Rain and falling snow were included in Beta 1.5. Rain looks identical to the rain in Classic, but also plays two different sound files.