Tested in Forge 2768 and 2796, with no other mods added.

When in a Winter subseason, biomes where it doesn't otherwise snow normally will have snow fall -- but it will not stick to the ground. This happens in multiplayer, but does not happen in singleplayer.

Does the server have the mod installed (Since the mod can technically function client-side only with minor issues), and do you have the same config as the server? I've seen a few other people reporting this, but I gotta make sure before determining that it's caused by something with the mod itself.

Yup, absolutely on both. This occurred in a modpack I was using for a private server with friends, and then I was able to also confirm it with just the mod installed. I made sure the configs matched with the modpack and with this test. Other features of the mod seemed to work on the server fine as well.

Hmm, okay. I think it might have something to do with our recently added dimension whitelist. Gonna have to get our lead coder to look into it when he has time.

I tested it myself, and it seems to be some kind of weird temperature discrepancy between singleplayer and multiplayer, It seems to snow properly in biomes like the Extreme Hills and Taiga, but the Forest and Plains aren't accumulating any like they should.

Doesn't make sense at all though, as singleplayer is essentially just a server being run locally from the client. I told our lead coder about it, and while he hasn't looked into it yet, it definitely shouldn't be happening.

In case people are interested in what the issue was, basically 7ef6dfe switched to using our getFloatTemperature code, which relied on SeasonHandler.clientSeasonCycleTicks which is only set client-side. The above commit fixes that

What also happend to me its snowing in the spring, but the snow is disappearing. and it rains in the winter and then snow spawns on the ground...