It happens every year. You put off exterior painting projects until the first cold spell arrives and then it kicks you into gear to start painting outside. Most manufacturers have exterior latex products that can be applied down to 35 degrees. Sounds good right, but the problem is the temperature needs to stay above 35 degrees for at least 24 hours. That is a little harder to achieve in late November and December depending on where you live. Also note, that surface and air temperature can vary greatly. Do yourself a favor and spend a few bucks on a digital laser temp gun. If you have already missed your window for temperatures to remain above 35 degrees overnight you are better off waiting until spring for the weather to warm up. Nothing is as frustrating as spending your time and money on a painting project only to have cold weather ruin your work.
The key is to check your weather forecast and the data sheets on the product to make sure the two are in agreement with each other. Here are a few exterior products that can be applied down to 35 degrees.