This is a hard question to answer, as many factors can contribute to the length of time that your exterior paint lasts. The duration your exterior paint will last largely depends on the quality of the exterior paint that you used, the weather conditions where you live, and the health of the surface that you are painting. Generally speaking, exterior paint can last anywhere between 7 to 10 years. That being said, this can differ significantly when you take the factors above into account. For instance, if you live in an incredibly rainy region, then your exterior paint will likely need to be touched up sooner than this, simply because it’s being subjected to harsh weather conditions on a regular basis. Whether you use a sealant and primer will also determine how long your exterior paint job will last, too. If you want to prolong the life of your exterior paint, then it is highly recommended that you properly prepare your exterior surfaces with a sealant and/or primer, depending on the surface that you are painting.