Is this sentence correct?

J'adore quand il fait chaud.

That says "I love when its hot"

Yes, but is it grammatically correct?

"adorer" is a transitive verb (meaning it requires a direct object).

Based on Missy literal translation can you correct the sentence?

Alternatively, you can say simply
J'adore ... the warm days....

Yes, the sentence "J'adore quand il fait chaud" is correct. It translates to "I love it when it's hot" in English.

If you want to check the correctness of a sentence in French or any other language, you can follow these steps:

1. Grammar: Verify that the sentence follows the rules of grammar, such as subject-verb agreement, correct verb forms, proper use of articles and pronouns, and so on. You can refer to grammar resources or consult a grammar guide for the language in question.

2. Vocabulary: Ensure that the words used in the sentence are appropriate and properly translated. Check if the sentence conveys the intended meaning accurately.

3. Context: Consider the context of the sentence and make sure it fits logically and meaningfully within the overall conversation or text.

4. Native Speaker: If possible, consult a native speaker or a language expert to validate the correctness of the sentence. They can provide valuable insights and correct any errors or awkward phrasing.

By using these steps, you can evaluate the accuracy of sentences in various languages.