The short answer: No, fiber optic cables themselves don't freeze in the same way water or metal does. The actual glass or plastic inside the cable that transmits the data is not affected by. Summary : Winter weather generally has minimal impact on fiber optic cables since they transmit data through light rather than electricity, making them resistant to temperature-related signal loss. Here's how cold weather can. When winter arrives with its freezing temperatures, it's natural to wonder whether essential infrastructure like fiber optic cables is at risk of freezing and causing connection problems. After all, many communication networks today rely on these cables to transmit vast amounts of data efficiently.