Well, that doesn't give us much to go on. 
When the weather is cooler, plant lettuce, radishes, spinach, mustard, turnips, things like that. If you look on the seed package, it will tell you how long it takes a crop to mature. Some things take warm weather to finish up, like tomatoes and peppers, so they're not good to start right now in most areas. Other things nee a longer growing season than lettuce and greens but don't mind the cool, like potatoes and most root crops, although you might be able to grow beets right now.