

Human: Why did the temperature drop 30 degrees today

Assistant: Did you have warm or cold weather in the previous day?

Human: Warmer than this. It's dropped 30 degrees

Assistant: Is it warmer or colder now than the temperature in the previous 24 hours?

Human: colder

Assistant:
 So, then, a 30 degree change is much more significant than a 2 degree change.
 So, then, a 30 degree change is much more significant than a 2 degree change.
 We usually expect this to be warmer when the weather has changed.  Can I suggest that you do some more checking to understand what's going on?