1. What's the temperature? It's 33 degrees.
2. What's a temperature? It's 33 degrees.
Is #2 correct? Can we use 'a' instead of 'the'?
no you can not
Mikaila is correct. Sentence one is correct; sentence two is not.
Yes, in this case, you can use "a" instead of "the" before the word "temperature." Both sentences are grammatically correct, but they have slightly different meanings.
When you say "What's the temperature?" with "the," you are referring to a specific temperature, possibly in a specific location or context. For example, if you are asking about the temperature outside, you might be referring to the current weather conditions.
On the other hand, when you say "What's a temperature?" with "a," you are asking for a general understanding or definition of the concept of temperature. In this case, you are not referring to a specific temperature but rather seeking a more general explanation of what temperature is.
So, depending on the context and what you are trying to convey, you can use either "the" or "a" before the word "temperature" in your sentence.