Cold weather effects on Refrigerators

I don't know if this has been covered previously, it's crunch time and I don't have time to research. It has been in the low 20's at night and the 30's for the last few days. Heading for Florida tomorrow and my refrigerator is not performing as in the past. It is struggling for the freezer to get below 20 deg. Does cold weather have an impact on the performance of gas/electric refrigerators? Thanks in advance.