It's not the heat, it's the humidity proverb
Used to mean that it is the high humidity that makes a person uncomfortable rather than the degree of heat
A: I feel that summer in the south is much hotter than in the north. B: Well, it's not the heat, it's the humidity.
Rainy, wet weather
If the heavens open, it starts to rain heavily.
Intensely hot and irritated
A heavy rain
Wonderful weather, particularly on a day when an outdoor event is scheduled
A humorous way of saying that what one has said is just what they acknowledge and may not be entirely accurate
Mike: Have you returned from your vacation on the beach? Your skin seems to get tanned.
Jenny: My skin is always dark. That's my story and I'm sticking to it!