When conduits are placed above the frost line, ice formation can exert pressure on the fiber cable inside. 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. However, extreme cold, ice, or snow can affect the cable's outer jacket, cause physical stress, or. 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. Since failures tend to happen in winter, weather was suspected. Many advantages come with installing fiber optic cables over traditional copper cables, but that doesn't mean they are invincible.