I use Siri for all of those functions. It's reliable, the mistakes it makes are understandable, but it rarely makes any.
If I want to know the time in France it is easier to just ask.
You can also compare information, just put the second thing in parentheses. If I don't know how to spell a word, like just now with "parentheses", I just said it in Dictation.
With Siri, you can see the UV index of the entire United States and some places in Europe. You can also see what aircrafts are overhead.
Just say, "What aircrafts are overhead?"
Siri has a lot of functions we don't know about.