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Global Weather – NWS Heat Index Calculator
x402
Global Weather – NWS Heat Index Calculator is a paid API for AI agents from weather-global.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).
Calculates the NWS heat index (feels-like temperature in hot conditions) from air temperature and relative humidity, returning values in both Fahrenheit and Celsius along with an NWS risk category.
Price / call$0.02
Success—
StatusUnknown
How this service works
NWS heat index (feels-like in heat) from air temperature and relative humidity, in F and C, with the NWS risk category.
Output
Returns the computed NWS heat index in both Fahrenheit and Celsius, the original input temperature in both units, the humidity percentage used, an NWS risk/danger category label, human-readable guidance, a summary, reasons, and a disclaimer about the calculation method.
Example use cases
Outdoor worker heat safety check
“It's 102°F with 75% humidity on the job site — what's the NWS heat index and what risk category does that put workers in?”
Heat advisory dashboard alert
“Calculate the heat index for 38°C and 65% relative humidity and tell me the NWS danger level so I can decide whether to issue a heat warning.”
Athletic event safety screening
“We're running a race this afternoon at 91°F and 88% humidity — what's the feels-like heat index in both Fahrenheit and Celsius and what does NWS say about the risk?”
Technical details
Endpoint
GEThttps://weather-global.x402tookit.com/heat-index?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need the NWS-standard heat index calculation — the official US government formula for feels-like temperature in hot, humid conditions — including the official NWS risk classification (Caution, Extreme Caution, Danger, Extreme Danger). Prefer this over generic weather forecast endpoints when you need a precise, formula-based apparent temperature for safety assessments, health monitoring, or compliance with NWS heat advisory thresholds, without needing real-time location data.
Side effects
- Missing required 'temp' or 'humidity' query parameters returns an error
- Humidity values outside 0–100 range may produce invalid or degraded results
- NWS formula only applies at high temperature and humidity combinations; low conditions may return a degraded or not-applicable result
- Invalid unit value (not F or C) may cause computation failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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