If you have really harsh winter conditions, it is recommended to use a proper winter tyre. The all weather tyres can handle some winter weather, but in the challenging and rapidly changing winter weather conditions a proper winter tyre is your best choice. If you have an all-weather tyre you can manage with that tyre also during the summer season.
If you are buying a summer tyre, you need to select a tyre that is suitable for your needs, your car and your driving conditions. Whether you have an SUV car, a sports car or a small size car, all of these will need different types of tyres. The EU tyre label can help you compare different tyre characteristics and choose a tyre that is fuel efficient due to low rolling resistance, has a good wet grip, based on braking distance on wet roads, and finally is less noisy while driving. These might not be the main criteria for you, but can still guide your decision once you have found a few tyres that fit your main criteria.
It is important for summer tyres to perform well on wet roads. In addition to having a good wet grip, they also need to be efficient on removing water by pushing it away to ensure proper contact between the tyre and the road. If the contact is lost, you will experience aquaplaning. In aquaplaning, you lose control over your vehicle. This can be very dangerous and can cause accidents. You will regain control as the speed is reduced and enough water can be pushed away. Some summer tyres are better designed for this. I tend to prefer these tyres.