temperature required to stain a deck
1 A good temperature range for staining is 50 to 90 degrees F--if wood is too hot to leave your hand on comfortably, then it's too hot to stain. 2  Pay attention to humidity too--the higher the humidity, the longer the drying time. Then start staining again in the afternoon when the sun is lower, staining 2 or 3 boards at a time their entire width. 2  A good temperature range for staining is 50 to 90 degrees F--if wood is too hot to leave your hand on comfortably, then it's too hot to stain.