Wind Chill Calculator

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The actual measured air temperature. Wind chill is only meaningful at or below 50 F (10 C) because warmer air cannot accelerate body-heat loss at a dangerous rate.
F
Measured at 5 ft (1.5 m) above the ground (face height). The NWS formula is valid for speeds of 3 mph (4.8 km/h) or higher. Calm or near-calm winds produce no meaningful wind chill effect.
mph
Wind Chill (Feels Like)Cold - risk of hypothermia
4.2

Equivalent temperature felt on exposed skin

Temperature Drop15.8
Frostbite RiskModerate - 30 min to frostbite
Danger LevelCold - risk of hypothermia
Wind Chill in F4.2
4.2 F
Extreme Cold<-37Very Cold-37--17Cold-17-15Cool15-32Mild32+

Wind chill of 4.2 F - Cold.

  • The wind makes it feel 15.8 F colder than the actual air temperature.
  • Exposed skin can develop frostbite in approximately 30 minutes at this wind chill.

Next stepDress in moisture-wicking base layers, insulating mid-layers, and a wind-resistant outer shell. Cover your head, hands, and ears.

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