。
The north wind blew all day long.
Literal
North-wind [topic-は] 1-day all-time blow-continued.
北風 ('north wind') has slight poetic/literary resonance — associated with winter and cold. 一日中 ('throughout the whole day, all day long') uses 中 as a time-span marker. 吹き続ける is a compound: 吹く ('to blow') + 続ける ('to continue') — '[to] keep blowing.'