When you should plan to paint the exterior of your property will vary based on a number of circumstances, such as the time of year, the state of your home's exterior, and your availability. The optimum time to paint the outside of your home is when the weather is dry and moderate, between 50 to 85 degrees Fahrenheit.
Exterior painting is best done in the spring and fall when temperatures are mild and the weather is often dry and sunny. The quality of the paintwork, though, can suffer if you try to paint when humidity levels are high or if there's a chance of rain.