🌬️ Wind Chill Calculator
Understanding Wind Chill
Wind chill is the perceived decrease in air temperature felt by the body due to the flow of air. It combines the actual air temperature with wind speed to give a "feels-like" temperature, helping you understand how cold it truly feels outside and the risk of frostbite.
The formula used by the National Weather Service (for °F and mph) is:
Wind Chill (°F) = 35.74 + 0.6215T - 35.75V0.16 + 0.4275T V0.16
For metric units (°C and km/h), the equivalent formula is:
Wind Chill (°C) = 13.12 + 0.6215T - 11.37V0.16 + 0.3965T V0.16
Wind Chill Reference Chart (in °F)
Here's a quick reference for wind chill values at various temperatures and wind speeds:
| Temp (°F) | 5 mph | 15 mph | 25 mph | 35 mph |
|---|---|---|---|---|
| 40 | 36 | 29 | 24 | 20 |
| 30 | 25 | 16 | 9 | 4 |
| 20 | 13 | 3 | -4 | -11 |
| 10 | 1 | -10 | -18 | -26 |
| 0 | -11 | -24 | -33 | -41 |
Note: Wind chill only applies when temperature is ≤ 50°F (10°C) and wind speed ≥ 3 mph (4.8 km/h).
Winter Safety Tips
When wind chill values drop below -18°F (-27.8°C), frostbite can occur on exposed skin in 30 minutes or less. Always dress in layers, cover exposed skin, and limit time outdoors during extreme cold.
