While not always the case, photographing landscapes or urban buildings is almost always better very early or very late in the day. The light is more "golden" and not as harsh as it is in the middle of the day. Plus it just works better with your compositions....and in the city, there are less people and vehicles to get in your way.
Harsh, mid-day sun is one of the main causes of frustration for landscape compositions and is probably the root of most questions regarding problems with exposure outdoors. This is especially true for those who are relatively new to tackling outdoor photography.
It took me a long time to finally admit that if I was going to get good landscape photos, I needed to either get up earlier or have a late supper.