Temperatures between 50 to 90 degrees Fahrenheit are the best for staining a wooden deck. The weather should be checked prior to staining to be certain there is no rain in the forecast for two days. Air temperature and humidity affects the drying times of the stain.
Wait a few weeks after a new wooden deck is built to allow the wood to dry so the stain absorbs better. Do not apply stain in direct sunlight, as the finish dries too quickly and does not absorb properly. Follow all manufacturer's directions on the stain for tips to achieve best results.