Too cold for tomatoes and peppers?

I ordered some tomato plants from a seed company and they sent them to me a week or more ago.  It is still too darn cold to plant them and I really don't have a great place, like a greenhouse to keep them until they are ready to go totally out side on their own.  Darn you nurseries and garden centers.  I know you want to make room for other plants but really, it i still getting down in the 50's at night! Anyone else find this annoying?