Paint will often not dry properly in cold temperatures, or will take longer to dry, which is why it is best to use paint outside in warmer parts of the year. More often than not, your paint will specify temperatures it is safe to use in – typically above 50 degrees and below 95 degrees Fahrenheit – for the best results. Inside your home, these temperatures are easily achieved by putting on your central heating system or using an air conditioner to keep it cooler in summer.