A few weeks ago we shared some photographs of University of Pennsylvania's Weave Bridge to make the point that even though sunny days are generally the best days to shoot architecture the sun can also create unwanted, distracting shadows.
The following is a great example of why sunny days are, as a rule, best for architecture:
One could not ask for better conditions to photograph this office building in West Chester, Pennsylvania. The direct sun's contrasty light gives the brick facade an attractive color and makes strong, but open shadows that give an otherwise simple structure a sense of volume and presence. The beautiful blue sky also has a nice balance of soft, wispy, white clouds.
The weather does not often cooperate and can wreak havoc with deadlines. Above is a comparison between an unretouched shot of the same building during a cloudy and damp day, and the same shot with an example of the sort of retouching that is sometimes necessary. Even though the added sky improves the shot; the pavement is still very wet. It is clear that returning to the site when the weather was best yielded the better image.