Wind Chill Calculator
Calculate the wind chill factor (feels like temperature) based on actual temperature and wind speed. Get frostbite warnings and safety recommendations.
Wind Chill
Feels Like
6.2°F
Wind chill temperature
Cold. Dress warmly and limit exposure.
Quick Weather Scenarios
Units
Weather Conditions
Temperature Comparison
Actual
20°F
Feels Like
6.2°F
Wind makes it feel moderately colder.
Frostbite Risk by Wind Chill
| Wind Chill | Frostbite Time | Risk Level |
|---|---|---|
| Above 32°F (0°C) | N/A | Safe |
| 0°F to 32°F (-18°C to 0°C) | Low risk | Caution |
| -20°F to 0°F (-29°C to -18°C) | 30+ minutes | Warning |
| -35°F to -20°F (-37°C to -29°C) | 10-30 minutes | Danger |
| Below -35°F (-37°C) | <10 minutes | Extreme Danger |
Wind Chill Reference Chart
| Temp\Wind | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 |
|---|---|---|---|---|---|---|---|---|
| 40°F | 37 | 34 | 32 | 31 | 29 | 29 | 28 | 27 |
| 30°F | 25 | 21 | 19 | 17 | 16 | 15 | 14 | 13 |
| 20°F | 13 | 9 | 6 | 4 | 3 | 1 | 0 | -1 |
| 10°F | 1 | -3 | -7 | -9 | -11 | -12 | -14 | -15 |
| 0°F | -10 | -16 | -19 | -22 | -24 | -26 | -27 | -29 |
| -10°F | -22 | -28 | -32 | -35 | -37 | -39 | -41 | -43 |
| -20°F | -34 | -41 | -45 | -48 | -51 | -53 | -55 | -57 |
| -30°F | -46 | -53 | -58 | -61 | -64 | -67 | -69 | -71 |
| -40°F | -57 | -65 | -71 | -74 | -78 | -80 | -82 | -84 |
Wind speed in mph, temperatures in °F
Activity Guidelines for Current Conditions
Outdoor Activities
⚠️ Take breaks
Exercise
⚠️ Reduce intensity
Outdoor Work
⚠️ Frequent warm-up breaks
Recommended Clothing
Frequently Asked Questions
Wind chill (or wind chill factor) is the perceived decrease in temperature felt by the body due to wind. Moving air accelerates heat loss from exposed skin. A 20°F day with 15 mph wind feels like 6°F on your skin.
The NWS formula: Wind Chill = 35.74 + 0.6215T - 35.75V^0.16 + 0.4275TV^0.16, where T is temperature (°F) and V is wind speed (mph). It's valid when temp ≤50°F and wind ≥3 mph.
Wind chill below 0°F poses frostbite risk within 30 minutes. Below -20°F: frostbite in 10-30 min. Below -35°F: frostbite in 5-10 min. Below -50°F: frostbite in under 5 minutes. Cover all exposed skin!
Wind chill only affects warm-blooded creatures. Objects cool to air temperature regardless of wind. A car won't get colder than the air temperature no matter how windy. Wind just helps objects reach air temperature faster.
Layer clothing with moisture-wicking base, insulating middle, wind-blocking outer. Cover extremities (hat, gloves, face mask). Limit exposure time. Stay dry - wet clothing increases heat loss dramatically.
Wind Chill
Feels Like
6.2°F
Wind chill temperature
Cold. Dress warmly and limit exposure.