I asked ChatGPT out of curiousity, and this is what it said:
"
The amount of time it would take to die from exposure to 15°F (-9°C) depends on various factors, including the individual's clothing, health, age, and physical condition, as well as whether they are wet, sheltered, or moving.
In general, when exposed to temperatures like 15°F:
- **Hypothermia** sets in as the body's core temperature drops below 95°F (35°C).
- **Frostbite** can occur in exposed skin (e.g., fingers, toes, ears) within 30 minutes.
- For a healthy person dressed in layers with proper insulation, it could take **several hours** before hypothermia or frostbite becomes life-threatening.
- However, someone without adequate clothing or shelter might begin to experience severe symptoms within **30 minutes to 1 hour**, and death could occur within **a few hours** due to hypothermia if no help arrives.
In any case, exposure to temperatures around 15°F is extremely dangerous without proper protection, and it's important to avoid prolonged exposure to prevent life-threatening consequences.
"