If you have not checked the tread depth of your tires, end of summer can be a good time to do so, especially if you plan to shift to winter tires. This way you will know if you need to buy a new set of summer tyres for next year. A lot of tire shops will have discounts on summer tires at end of summer or during the winter season, so buying early can save you money. Also it saves you the problem of having to try to find tires at the same time as everyone else is buying summer tires.
Checking the tread depth is easy and quick. The easiest way is to use a coin and push it into the tread and measure on the coin the depth. You should be above 5/32 inches for safe driving.