Free Wind Chill Calculator

Find the 'feels like' temperature using the official NWS formula.

Wind chill only applies meaningfully below about 50°F with wind above 3 mph — the NWS formula was revised in 2001 based on updated research into how wind actually accelerates heat loss from exposed skin, replacing an older, less accurate formula.

Worked Example

Example: 20°F air temperature, 15 mph wind → wind chill ≈ 6°F.

Formula / Method

Wind Chill (°F) = 35.74 + 0.6215T − 35.75(V^0.16) + 0.4275T(V^0.16), where T = air temp (°F), V = wind speed (mph). Valid for T ≤ 50°F and V ≥ 3 mph.

Worked Example

Example: 20°F air temperature, 15 mph wind → wind chill ≈ 6°F.

Formula / Method

Wind Chill (°F) = 35.74 + 0.6215T − 35.75(V^0.16) + 0.4275T(V^0.16), where T = air temp (°F), V = wind speed (mph). Valid for T ≤ 50°F and V ≥ 3 mph.