Sometimes what YOU are asking is not what I am hearing. Let's be clear.
Some projects can only be done at certain times of the year. For example, it is no surprise that you see road crews in Michigan working in the summer and not in the winter. This is true in other states as well. The northern states have very cold winters with a lot of snow, and these conditions can make it impossible for workers to do the jobs that need to get done. On top of this, the driving conditions can be rather bad, so there is more danger to those crews when snow and ice are covering the roads. To find out about the best months for jobs like seal coating, you have to consider all of these things.