Quick Answer
Frostbite risk increases significantly when temperatures drop below 25°F (-4°C), with the most severe cases occurring at temperatures below 0°F (-18°C).
Understanding Frostbite Temperature Thresholds
Frostbite is a serious condition that occurs when skin and underlying tissues freeze due to prolonged exposure to cold temperatures. While the exact temperature threshold for frostbite varies depending on individual factors such as wind chill, humidity, and duration of exposure, most medical professionals agree that frostbite risk increases rapidly below 25°F (-4°C). Prolonged exposure to temperatures below 0°F (-18°C) can result in severe and potentially life-threatening frostbite.
Recognizing Frostbite Stages
Frostbite is classified into four stages: frostnip, superficial frostbite, deep frostbite, and gangrene. Frostnip, the least severe stage, typically occurs when skin temperature drops to around 32°F (0°C). Superficial frostbite, which can cause pain and numbness, occurs when temperatures drop to around 14°F (-10°C). Deep frostbite, which can result in permanent damage, occurs when temperatures drop to around 0°F (-18°C). Gangrene, the most severe stage, typically results from prolonged exposure to temperatures below -20°F (-29°C).
Treating Frostbite in the Field
If you or someone you know is at risk of frostbite, it’s essential to act quickly to prevent further damage. If the affected area is numb or painless, do not attempt to warm it up. Instead, remove any constrictive clothing, elevate the affected area, and seek medical attention as soon as possible. If the affected area is painful, apply warm water (not hot water) to the affected area, but avoid direct heat sources such as stoves or heaters. Monitor the affected area closely for signs of thawing, which can cause further damage.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.
