What bearing does the level of rainfall have on a game?

[Fart_Gas]

I've seen temperate forest tiles with rainfall at 1940 mm, and other temperate forest tiles with rainfall at 780 mm.

Does this level of rainfall affect the game? For example, does it affect crop success? Does it reduce the spread of fire?

[Stormblade]

https://rimworldwiki.com/wiki/Environment#Weather

There's a table at the bottom that explains it, but basically higher rainfall = more chance of the 'Rain' weather types kicking in. Rain lowers movement speed, shooting accuracy, effects wind speed (used for the Wind Turbines) and can put out fires and cause certain electrical items to short circuit (batteries and crematoriums, off the top of my head).

I think it can also give pawns the 'Soaking Wet' moodlet, but that may only be for walking through water. I don't pay that much attention to it, honestly.

[glass zebra]

Originally posted by Stormblade:

I think it can also give pawns the 'Soaking Wet' moodlet, but that may only be for walking through water. I don't pay that much attention to it, honestly.

Rain does this too and it's only -3 for 2h.

[Astasia]

Originally posted by Fart_Gas:

does it affect crop success?

No. Crops don't care about water and grow just as well in a desert as a rain forest, assuming similar temperatures and the same soil.

Originally posted by Fart_Gas:

Does it reduce the spread of fire?

Not really. When there are more than a certain number of active fires on the map a system kicks in which will make it rain to put out those fires, biome and amount of average rain doesn't directly matter. On a rain forest it might be more likely to start raining naturally before that system kicks in, keeping the fire smaller, but that's not particularly likely. If anything a rainier rain forest has more thunder storms which result in more left over fires starting in the first place. It's probably close to a wash, but I would hazard to say you are more likely to have issues with fire on a map with a lot of rain than one with less rain. It's not a factor I would consider when picking a biome to play in though.

[Vermillion Cardinal]

If you're running mods then rainfall levels might have a bit more impact. For example, Vanilla Farming Expanded has peas that grow faster under rainy conditions so you can take advantage of higher rainfall to grow food faster, while Zombieland has both toxic and sticky goo that only really washes off with the rain (have fun spending hours cleaning the latter when it doesn't rain, while the former can't be manually mopped up at all afaik). I suppose mods that add water needs might also include rain catchers (never bothered with those though).

[Husker_85]

Would you enjoy living somewhere that has constant rain? If you answered no then you have something in common with your pawns. Matters a lot less with a superstructure or mountain base, but if you do a lot of agriculture your field hands will be unhappy.

[MadArtillery]

I find it convient living somewhere with rediculious rainfall as it makes fires almost always a nonissue. Even flash storms usually start when it's already raining which seem rather counterproductive as a mechanic. Not much of a flash storm at that point. Yay Rain!

[AngleWyrm]

https://steamcommunity.com/sharedfiles/filedetails/?id=2079784964