The old saying is that if the seed is round (example, Cabbage) store it in the freezer- all others, regular refrigeration. That being said, yes, your seed should be just fine. As mentioned prior, many people store their seed in the freezer. I typically store mine in the refrigerator but a couple years ago, my wife put it all in the chest freezer and I was not aware of it. No problems at all with germination. I assume you are just talking about typical garden seed.
For next season, just keep your new seed in the refrigerator and you will not have any worries. Just as a point of reference, I bought a ton (in error) of a particular variety of tomato in 2004. I, as usual, pulled out the seed, planted it and got near 100% germination. In fact, they are on the way to the garden today for transplant. Just normal refrigeration...
Not all seed will last that long- many, such as Lettuce and Onion, have a short seed life regardless if you refrigerate. Most are good at least 4 years.
