Today, I found this pattern of water spots in a parking space. Other parking spaces with cars in them also had similar patterns of water spots. What caused this pattern, and why are there more water spots on the right side of the photo than on the left side? It can all be explained by normal processes (for example, nobody was out there with a squirt gun).
Update/hints: This is a residential parking lot, and I took the photo around 6:30am.
Related puzzle: Why is the pavement wet?