Jupiter has snow...

[Brian G Turner]

...but not as we know it, instead being ammonia ice:
‘It’s snowing on Jupiter’: Incredible NASA pictures capture mysterious clouds

Still, there's an extra detail for our SF writers to include in their works - that when flying a ship through the upper atmosphere of a gas giant, you might actually experience snow.

 

[Vertigo]

Or hail, as he comments at the end of the article. And I have a suspicion that the Jupiter version of hail might not be something you'd want to be in the middle of

 

[Mirannan]

Or hail, as he comments at the end of the article. And I have a suspicion that the Jupiter version of hail might not be something you'd want to be in the middle of

Or the lightning that tends to accompany hailstorms. Jovian lightning strikes are so powerful that the radio noise from an individual one can be detected from Earth.

In this respect, Saturn is actually worse. Saturnian lightning bolts can be a million times stronger than the ones on Earth. This means that a Saturn lightning bolt can be equivalent to something like a megaton bomb.

 

[J Riff]

Too many images form...
And where there's snow.... there's ET snowball fights.
NASA reveals giant snowman on Jupiter...*
Hailstones the size of aircraft hangers spoil Jovian picnic plans..*
Sorry. )