That great angling writer, William Caine had the answer.....
".....November - I stay in town, December - I stay indoors, January - I stay in bed"
I guess he didn't have much time for Chub then? Cold January days just scream Chub and cheesepaste to me.
I don't think Ican nominate a least favourite month, I don't like fishing in foggy weather, never had much success then, (if any) but any other time can be good for something.