Do you have a pen? (“With you” is unnecessary and we don’t usually add those words.)
Is there a discount on this? (“For me’’ sounds a little unusual, as discounts are for all customers.)
Did you buy anything for your father yesterday?
What is the weather like in Hong Kong? (This way if you want to use “like.” Using “like” means the temperature in general.)
What is the temperature in Hong Kong? (Meaning right now.)
The temperature in Hong Kong is about 13 degrees Celsius. (Americans would specify Celsius or Fahrenheit.)
The temperature in Hong Kong is above 13 degrees Celsius.
If the last two statements were in answer to the question, “What is the temperature in Hong Kong?” we would not repeat “the temperature in Hong Kong” in the answer. We’d simply say “It’s about 13 degrees Celsius.”