Translation:In February they are already going to be in America.
the short explanation: because Америка starts with a vowel.
The long explanation:
"Во" Is used:
before monosyllabic words, esp.starting with two consonants (во сне - in a dream).
before many multisyllabic words, starting with two or more consonants, especially if the first one is в or ф (во Франции - in France, во владении - in one's property). But in many cases words starting with many consonants (but not в/ф) are still preceeded by в: в классе - In a class(room), в правилах - in a rulebook.
before words "всякий" and "весь": во всю мощь - at top of one's might, во всяком случае - in any case, or the Russian title for Breaking Bad series - Во все тяжкие.
in some set expressions: ложь во спасение - pious fraud
when the text needs to look archaic, old-fashioned or exalted... or IS archaic, old-fashioned or exalted:) folk chants, poetry, ceremonial and legal formulae etc etc etc
In a nutshell, в becomes во to make pronunciation easier and save the speaker from choking on barrage of consonants.