You can set a random thing that stars the weather or make a button that makes it do the weather event (rain and thunderstorm for beach and forest biome and snow and blizzard for snow biome)
How the random thing works
(Set a randomizer thing for (your set number/10) and every set amount of time it will randomize and if it successfully goes on the correct thing the wheather event triggers)
Rain effects
-small increase of water level (if theres any water)
-Puddles(makes splash effects,makes you slightly slippery if steped on)
Thunderstorm effects
-big increase in water level (adds water if theres no water)
-randomly spawns lighting out of the sky(your screen flashes if its abt to strike)
Snow effects
-makes it snow(leaves snow piles you can hide in)
Blizzard effects
-blows strong wind in random direction(pushes you)
-hard to see
-bigger snow piles you can hide in