I've recently commented on the magic hour photography in my The Mainstream Photographic Theory - The Magic Hours post. Here's another midday photo with less dramatic clouds this time. However, here, the cloud cover provided a nice diffused light that worked well for the symmetric composition and the reflection. Shadows to either side would have broken the symmetry.
To intensify the pier reflection in the water of Lake Erie, a graduated neutral density filter held the light above the horizon back a bit and allowed for the bright rendering of the water surface, showing as transparent where the pier cast its shadow and a reflection.
Have fun no matter what time of the day!