RESOURCEPACK IS OPTIONAL!

Main Information

WARNING! (for PaperMC and PurpurMC Hosters): This datapack will only work correctly if you only change the below settings. Head over to your server, and go to "config/paper-world-defaults.yml" or "purpur.yml" file. Find this "allow-non-player-entities-on-scoreboards" and set that to true.
Creator and Developer: [MC Silver]

Tested on: Vanilla & Spigot/Paper servers.
[You can suggest new gamerules and features on my discord server]

Snow layer gets higher during the snow.
Snow increases faster during the thunder.
Snow melts with this datapack. (from 0 to 128) (during the clear weather and if light is higher than 11)
Snow melts x9 times faster in dry biomes.
Snow melts x5 times slower in snowy biomes.
Farmland converts into a dirt during the snow, if it contacts with snow.
Lava cools down during snow.
Player/Mob take freezing damage during the snowstorm. You won't take damage in areas which light is higher than 11 or if you wear leather chestplate.

[Breezes, Rabbits, Camels and entities in leather helmet are immune to sandstorm effects]

Fire, Common Lightnings (On shovel and hoe mineable blocks) (Rain, Daytime only)
Massive Fire, Common Lightnings (On shovel and hoe mineable blocks) (Thunder, Daytime only)

Fireflies spawn almost in all biomes. [If weather is clear and from 60 to 100 height]
Fireflies are more common in swamp biomes.
Fireflies won't spawn in ocean, nether, end, mushroom fields biomes.

Campfire is extinguished when it rains.
Soul Campfire is extinguished twice much rarer than regular campfire when it rains.