Cold weather/temperatures can slow the growth of pathogens in urine samples, reducing the risk of false positives. When urine samples are stored at lower temperatures, such as in a refrigerator, the growth of bacteria and other microorganisms is inhibited.
This is why medical guidelines often recommend refrigerating urine samples if they cannot be analyzed immediately. Keeping the samples cold helps preserve their integrity and ensures that the test results are accurate by preventing the overgrowth of bacteria that could potentially alter the findings.
So shipping in cold weather/temperatures would keep the specimen more stable than hot weather/high temperatures, and overall, the UTI Zoomer specimen stability in non-extreme weather temperatures is 7 days.