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Everyday LifeGenerated accuracy model review: 2026-05-06
Wind Chill accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- The calculator uses the official **National Weather Service (NWS)** formula adopted in 2001: `Wind Chill = 35.74 + (0.6215 × T) - (35.75 × V^0.16) + (0.4275 × T × V^0.16)` * **T**: Air Temperature (°F) * **V**: Wind Speed (mph) Note: Wind chill is only defined for temperatures at or below 50°F and wind speeds above 3 mph.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Air Temperature: 30 °F
- Wind Speed: 15 mph
Expected outputs
- Wind Chill: 19 °F
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- The formula only applies at 50°F or below and winds above 3 mph.
- The result is for exposed skin and does not include sun or precipitation effects.
- This calculator uses the standard NWS wind chill equation.
Unit handling
- Air Temperature accepts values in °F.
- Wind Speed accepts values in mph.
- Wind Chill is displayed in °F.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current wind-chill-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Wind Chill.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.