This is the 999th most frequent Russian word.
апреле
"Апреле" is the prepositional case of "апрель," meaning "April" in English.
The word 'апреле' is used here with the preposition 'в', indicating the time period in the prepositional case.
В апреле деревья начинают цвести.
In April, the trees begin to bloom.
'Апреле' follows the preposition 'в', which specifies the month of April as the context for warm weather, using the prepositional case.
Только в апреле бывает такое теплое солнце.
Only in April is the sun this warm.
Here, 'апреле' is used in a context where it represents a time period in the prepositional case, referring to the month of April.