Generally speaking, when the humidity is right with enough sunlight, one can paint outside as long as the temperature is above 40 degrees (F). Any weather below 40 degrees causes the paint to freeze and no painting should be done. The temperature is a factor that RC Painting LLC carefully considers before painting the exterior of a house because of our labor warranties. Should the climate be poor to paint, we will reschedule with our customers on warmer days. This was the tip of the day from your RC Painters, Colorado Springs.