February could snap back to the December pattern being on the warm side of western lakes cutters. Brief window in transition for another New Years event
Tried to build in some margin for error by waiting till the 20th. Most years the last part of April seems to signal sustained warmth(50-70F) and spring like temps. Grass starts growing and can purchase flowers to be planted around Mother's Day.
Pretty much what I expect every winter. Exceptions happen like 2007-08,13-14 etc. Trend seems to be eliminating December as a winter month lately. Not sure if March and April will make up for lack of activity in December.