temperature for staining 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.he best time to stain your home's exterior, deck siding, or outdoor furniture is when temperatures are moderate (above 50Â°F, but below 95Â°F), the humidity is low to average, and there is no rain in the immediate forecast. Ideally for a least 12 hours.