Sunny Days Help You Think

Does a cloudy day leave you groggy and unable to focus? If so, a study suggests you’re not alone: Cloudy days, regardless of season, can have an effect on cognitive function, MSNBC reports. Researchers cross-referencing the results of cognitive tests from 16,800 Americans with data on daily sunshine and cloud levels found a correlation—in depressed people—between cloudy days and decreased performance.

“We don’t yet know if living in a climate that consistently bombards you with light will improve cognitive function," says a psychology professor. "But there’s good evidence from the mood research front that visiting such a place and getting away from a gloomy place for a stretch of time is likely to have a good impact.” (More weather stories.)