This is the exact same way you would normally find the darkest parts of the image when you're removing any color casts from the shadow areas, but now, thanks to the Difference blend mode, these darkest areas represent the areas closest to midtone gray.
The warmest sea in Key Largo in March is 26Â°C/79Â°F, and the coldest sea temperature in March is 22Â°C/72Â°F. Average water temperature in Key Largo in March is 24Â°C/75Â°F. You can choose any other years:
Wise Floridians from the mainland flock to the Keys on steamy weekends because the air is usually a few degrees cooler here. The water temperature might be in the mid-80s (30Â° C) but the sea is nevertheless refreshing for swimming, snorkeling or diving. In the winter, cold fronts can bring frost to mainland Florida, but you can be sure there will be no frost here. The all-time record low for Key West is 41Â° F (5Â° C) set in 1981.