Of course, the lower angle of the sun in fall season also creates brutal glare, which can cause temporary blindness and make your daily commute much more treacherous. So you still need eye protection of sun shade.
Yes, wearing sunglasses is a must whenever you’re outdoors, even if the sun isn’t exactly shining in autumn. More than being a fashion accessory, shades are designed to protect your eyes from harmful UV rays which are still present even when it’s cloudy outside.