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:
Key Largo Weather Forecast & Temperature Average. The lower Florida Keys have to be one of the sunniest and warmest places in the United States year round. Our climate in the winter maintains at around 75-80 degrees with warmer days mixed in. The weather is almost perfect every day here with passing showers that really don't last all day long like the fronts experienced up north.