Well, similar to how hot things sound different when poured because their viscosity is different, the heat would also cause different compounds to be released and likely also release more aroma in general I guess.

I also check outside temperature with my nose. It's very reliable since the nose has a very even temperature, the cold sting on the nose is good for -10 to 10 degrees. Also outside just smells very different by how hot it is from 15 to 35. Celsius that is.