Taken from Abbott Labs - see below

11. Can the tests still work after sitting in cold temperatures?

Yes. A storage temperature range is very common in OTC health products. For BinaxNOW, it’s between 35.6 and 86° F and the test should be kept within this range. But if the test is stored outside the temperature range for a relatively short period of time – for a couple of hours up to a day or two – it will be fine to use, and it’s important is that test and its components be used at room temperature.