The best time of year to hire window washers depends on a few factors and may vary depending on your region. Generally speaking, most window cleaning companies prefer to work in the spring or early summer months for several reasons. During this time of year, there is generally more daylight which means that it is easier and faster for professionals to clean windows. Additionally, the weather is usually dry and warm during this season, allowing them to get the job done with minimal interruptions due to rain or snow. The temperatures are also mild enough during these times that they don’t have to worry about extreme temperatures that could create health issues while working outside. Another important factor when considering hiring  window washers at any particular time of year revolves around how quickly you need your windows cleaned. During peak seasons (spring/summer) many companies can be booked up quite far in advance so if you require fast service then it might be better for you to wait until off-peak periods such as fall or winter months where there isn’t as much demand for their services so they won’t be too busy and can provide quicker turnarounds times per request.