I think SI uses 100o circles.
Anyway, the most common elements are some of the low-mass metals and nonmetals. Those never show up in elemental form(except noble gases and low-mass noble metals). Elemental hydrogen is highly reactive, and if there is oxygen around (which there always will be in nature), it will likely form water.
In stars almost everything is in plasma form, in which they stripped of electrons. An element is a substance, but when an atom is in non-elemental form, it is a different substance. Water is the most common substance
As for the Earth-centric comment . . . Only the planets that are on the highest extremes of heat or cold (naturally possible) don't have weather. Besides, life and weather are just examples.
And people keep insisting that the discussion be dropped because there is a lot of faulty logic behind some arguments.
Angle is a unitless measure (it's actually a fraction, nothing else), and that's why it's not mentioned in SI. It doesn't matter whether you have 90/360° degrees, 100/400° gon or whatever, it comes down to 1/4th of a circle.
I compliment you for your comments about water. Most people think water is a rarity only found on earth, but this is of course nonsense. Hydrogen is the most abundant element in the universe, and Oxygen is following closely on third place. Also, water can form at very low temperatures, and even very high, if pressure is also high.
Weather on other planets is a bit off-topic though. I don't think we need a scale for gaseous-metal-storms that is useful for regular people. At least not in the near future.