"February fill dyke with black or white, but if it be white, it's a sight."
This saying refers to the weather in February.
* "Fill dyke with black or white" means that February can either be a month of heavy rain (black) or snow (white).
* "But if it be white, it's a sight" implies that while both rain and snow are possible, snowfall is more picturesque and enjoyable.
The phrase "dyke" in this context refers to a ditch or channel, highlighting the potential for heavy rainfall and flooding in February.