How long can you survive in sub zero temperature?

Survival in sub-zero temperatures depends on several factors, including clothing, shelter, wind chill, and individual health. Generally, hypothermia can set in within 30 minutes to an hour in extreme cold without proper insulation. However, with adequate clothing and shelter, individuals may survive for several hours to days, depending on their resources and physical condition. It's crucial to seek warmth and protection as soon as possible to increase survival chances.