|21°F to 40°F
|1°F to 20°F
||VERY COLD. Very unpleasant.
|-19°F to 0°F
||BITTER COLD. Frostbite possible. Exposed skin can freeze within 5 minutes.
|-20°F to -69°F
||EXTREMELY COLD. Frostbite likely. Exposed skin can freeze within 1 minute. Outdoor activity becomes dangerous.
|-70°F and lower
||FRIGIDLY COLD. Exposed skin can freeze in 30 seconds.