Monday night's airport low temperature was 38. If you check around your home, see if anything was nipped by the frost at all. If you discover anything, you will get a sense of how much different your micro-climates are around your home. One area will be different than another so check it out.
Here is a good picture
of a day lily with frost damage.
Have a great weekend!! Don't forget - this is a great time to plant your winter annuals for days filled with living color!