I think this should be 'I do not like it when it is cloudy.' or 'I don't like it when it's cloudy'. Maybe 'I do not like when it is cloudy." is OK in parts of the USA (?) but that's not how it would be said in Australian English.
The "it" is not mandatory. "I do not like it," implies some object that I don't like, instead not liking the status of the sky (cloudy)
I’m with Anna here: I have never heard (in British English) the sentence (or similar) without the first “it”. It does not need to imply any other object, just the weather, or general conditions.
Interesting. In British and Australian English, the phrase "I do not like when..." is never used? In American it's very common. I don't like when we don't agree about correct English.
Not that I’ve heard (I’ve been listening to British English for a looong time now!). I like it when we disagree about “correct” English ... it reminds me that there are many Englishes with fascinating differences.
I am now getting all the sentences in Latin script What do I do I have to do to switch it back to Cyrillic.?
Go to the full website, not mobile. There is a "switch" in the upper left of the webpage. When you switch it, the mobile website and app will also be switched.