Need some seasonal suggestions

While I could purchase summer berries frozen, I would rather eat in tune with the season.
What Fall/Winter fruits can you suggest to add to meals like oatmeal and yogurt, or even snack on by itself?

Also, anything low-calorie to replace my out-of-season berries woul help too!

So far I can only think of adding cranberries to my diet. I also already consume loads of pumpkin puree and apples.

Thanks in advance!