This is the 38th most frequent Spanish word.
hace
"Hace" means "it makes," "it does," or is used to indicate time ("ago").
In this sentence, 'hace' is used to describe the weather condition, translating to 'it is' in an impersonal weather context.
Hace calor hoy.
It is hot today.
Here, 'hace' indicates the time elapsed since an action occurred, functioning as 'ago' in English.
Hace dos años viajé a España.
I traveled to Spain two years ago.
In this example, 'hace' is the present tense of the verb 'hacer', meaning 'to do' or 'to make', used to describe an action being performed by the subject.