A restaurant manager can keep many plates spinning at once, but he or she can't control the weather -- and that's unfortunate, according to a new study.

Researchers at The Ohio State University have discovered that restaurant patrons tend to leave bad reviews for a restaurant if the weather's bad.

By comparing restaurant reviews with corresponding weather information from the National Climatic Data Center, the scientists were able to find a definite link between poor weather and poor reviews.

In fact, they say, patrons were three times likely to upload a bad restaurant review when the weather's bad than when it's not.

"A rainy day may put employees in a bad mood and that will affect their service," co-author Milos Bujisic, an assistant professor of hospitality management at the university said in a release. "Managers need to explain that to their employees and work to keep them motivated."