Nearly everyone agrees that San Diego has the perfect weather in the country. Never too cold, never too hot, always just right. And with only a minimal amount of rain every year, San Diego suits a person vacationing with a dog or dogs very well. But the weather in the San Diego area can vary quite a bit. As you move inland from the ocean summer temperatures reach above one hundred degrees F often. But in the central area of San Diego, it will usually remain in the seventies or lower. San Diego is a big city with big city traffic.