Fun fact: in most northern cities, temperatures average higher on November 1 than on April 1, by some two to five degrees. There is also a substantially higher probability for rain on April 1 (28%) than on November 1 (22%), and the wind on April 1 is slightly higher and more from the north and east than on November 1, which is more from the south and west.
Even setting aside playoff vs regular season, you are more likely to feel comfortable at a ballgame on November 1 than on April 1.