Things can burn in snowy biomes when thunder strikes trees or wooden structures.
Linked issues
duplicates 1
Comments 4
This sounds plausible, according to the wiki:
Rain (not snow) is falling in the target block. Thus, lightning does not naturally strike within cold biomes, or biomes where it does not rain (except in the Console Edition).
Could not reproduce in Windows 10 1.2.10.2. I found a Cold Taiga Hills biome and set weather to thunder. After about 40 lightning strikes, some of them directly in front of me, no fire was created. I then set the weather to clear, determined the coordinates of a spruce log block, and summoned lightning onto it about 10 times. Again, no fire occurred. Perhaps it only occurs in certain biomes?
Thank you for your report!
We're actually already tracking this issue at MCPE-19015, so we will resolve and link this ticket as a duplicate.
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I think it works as intended. Wood can be set on fire in any biome except if there is water near or on it.