Weather in Hilton Head Island in September. The average maximum daytime temperature in Hilton Head Island in September is a warm 29Â°C (84Â°F) with high heat & humidity. There are usually 7 hours of bright sunshine each day, which represents 58% of the 12 hours of daylight. The average sea temperature in and around Hilton Head Island in September is 27Â°C (81Â°F).
The moisture usually comes from above, seeping through the finish and soaking into the wood, but it can also come from below, if the subfloor is wet. You can kill the mold and get rid of some of the discoloration using wood bleach, but you may have to stain and refinish the floor -- or part of it. There is a big difference between black discoloration that has settled on the surface of your oak flooring and in a discoloration of the wood itself. You can attribute the problem to moisture in both cases, but in the first instance, remediation is fairly straightforward and doesn't involve sanding or refinishing.
Having gotten rid of all the concrete patio mold, use a garden hose to rinse off your bleach solution. Once your concrete patio has been vigorously rinsed, you'll need to dry it with a clean cloth or paper towels.