NWS heat index

Code snippets

curl "https://api.oanor.com/apparenttemp-api/v1/heat-index" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/apparenttemp-api/v1/heat-index", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/apparenttemp-api/v1/heat-index");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);

import requests
requests.get(
    "https://api.oanor.com/apparenttemp-api/v1/heat-index",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "note": "The heat index is how hot it feels when humidity is folded into the air temperature, from the US NWS Rothfusz regression. High humidity stops sweat evaporating, so the body cannot shed heat and the apparent temperature climbs well above the thermometer — at 90 °F and 70 % humidity it feels like about 106 °F. It is defined for shade and light wind; full sun can add up to ~15 °F.",
        "inputs": {
            "temp_f": 90,
            "humidity_pct": 70
        },
        "heat_index_c": 41.1,
        "heat_index_f": 105.9,
        "risk_category": "danger — heat exhaustion likely"
    },
    "meta": {
        "timestamp": "2026-06-06T23:53:54.325Z",
        "request_id": "856eef77-c6ab-46af-9945-b61497888751"
    },
    "status": "ok",
    "message": "Heat index",
    "success": true
}