it's really not a big deal. average temps in early april are around 50 for a high and 30 for a low, and by the end of the month the average high is up to 65. by that point of the year there's not much difference between the climate there and the climate in chicago, detroit or cleveland. they'll probably get a couple of "cold outs" or "snow outs" in a year, but i would guess that from beginning to end of the season, you'll get more rain outs in an open air stadium in, say, miami, boston or new york than you will in minneapolis. How's their late October? goes from 66/45 on the 1st of the month to 50/32 on the 31st. chicago starts at 69/48 and ends at 55/37. about 5 degrees difference. minneapolis does have an average low of 3 in mid-january whereas chicago's average low is in the lower to middle teens, but neither good for baseball in mid-january, and nobody is playing then. really, cold climate is only a huge problem in minneapolis during the months that baseball isn't being played. new york and boston average close to 20 inches more liquid precipitation than minneapolis over the course of a year, that's why i say that the northeast teams are more likely to lose more games to weather than the twins.