This is the 308th most frequent Spanish word.
estará
"Estará" means "he/she/it will be" or "you (formal) will be."
The word 'estará' is used to indicate future tense, describing the expected state of the weather.
Mañana estará soleado, según el pronóstico del tiempo.
Tomorrow it will be sunny, according to the weather forecast.
Here, 'estará' is used in the future tense, expressing an assumption about what is likely happening.
Debes esperarlo, estará llegando pronto.
You should wait for him, he will be arriving soon.
In this case, 'estará' conveys a future event, expressing a certain expectation.