Weather in Holguin is same as in the rest of Cuba has dry and wet season. Dry season is from November to April and rainy season is from may to October. I must admit that usually I see Holguin more warm as it is bit more south than for example Havana. But really if it rains during the rain season it is juts for an hour or two usually during the night. So does not matter when you decided to go and visit weather in Holguin will be just fine for you specially if you coming form the country where is very cold.
Above is photo of Holguin Cuba when weatehr was claudy !
Sunny Day Holguin in Cuba!