Wells can be drilled all year-round, including the winter. The cold will slow you down a little bit, and the process may take longer, but it is possible to drill a residential well in the winter, and the project would not cost more because drilling companies charge by the foot and not the hour, so you won’t have to worry about this aspect. The average residential drilling project takes a couple of days to complete, but it may take a week if it’s cold out. In reality, some well locations are more feasible during the winter because when the ground freezes, it allows technicians to access and drill spots that would be impossible to get to during the summer.