I-Calculator ye-Heat Index
I "ziva ngathi" ubushushu obungamanzi nobumanzi, usebenzisa i NWS Rothfusz formula.
Iinketho ze projekti
Malunga nale Calculator
The heat index, or apparent temperature, is how hot it really feels when humidity is combined with the air temperature, and this heat index calculator computes it from those two inputs. The body cools itself by evaporating sweat, but humid air is already close to saturated so sweat evaporates slowly, the cooling falters, and it feels hotter than the thermometer says. The tool uses the U.S. National Weather Service Rothfusz regression, a multi-term fit of temperature and relative humidity, together with its standard low- and high-humidity corrections.
As a worked example, 90 °F air at 60% relative humidity carries a heat index of about 100 °F — ten degrees hotter than the reading — and pushing the humidity to 80% drives it past 110 °F. The calculator returns the feels-like temperature, how much hotter that is than the air, and a humidity table so you can see how quickly the danger rises as the air grows muggier at a fixed temperature.
The regression is most accurate around 80 °F (27 °C) and above with meaningful humidity; below about 80 °F it reports no heat stress because humidity has little effect on comfort in cool air. It also grades the reading into the NWS danger bands — caution, extreme caution, danger and extreme danger — so a heat index above 103 °F signals a real risk of heat cramps or exhaustion, and above 125 °F a high risk of heat stroke, which is vital for planning outdoor work, sport and travel in hot weather.
Imibuzo ebuza rhoqo
Yintoni i-index yobushushu?
I-intshi yeqondo lobushushu, okanye ubushushu obubonakalayo, kukuziva njani ubushushu xa ubushushu obufanayo budityaniswa nobushushu bemozulu. Ubushushu obuphezulu bukhawuleza ukufudumeza kweekhemikhali, ngoko umzimba ukhupha ubushushu ngokulula kwaye uziva ubushushu ngakumbi kunokufunda kwe-thermometer.
Ifomula esetyenziswa yinto?
I-NWS Rothfusz yokubuyela umva: HI = -42.379 + 2.04901523T + 10.14333127R - 0.22475541TR - … (noT kwi °F ne-R kwi %), kunye nokugqiba okuphantsi kakhulu okanye okuphezulu kakhulu kobushushu. Kulungile kakhulu malunga ne-80 °F kwaye kushushu.
Yintoni ethetha ukuba amanqanaba obundlobongela?
Ngokubanzi: 80-90 °F kukhuselo, 90-103 °F kukhuselo olukhulu, 103-124 °F kungozi (uxinzelelo oluphezulu okanye ukulahleka kweengxaki) kunye ne-125 °F okanye ngaphezulu kungozi enkulu enamandla okutshatyalaliswa kwelanga.
Kutheni ubushushu obunomswakama bubangela ukuba ubushushu buzive bubi?
Ukutyeba manzi kukwenza upholile kuphela xa utywala luphuma. Kwimozulu eshushu, ekwindawo ephakathi koxinzelelo, ukutyeba manzi kukhawuleza, ngoko umzimba ukhupha ubushushu kakubi kwaye i-90 °F iziva ishushu kakhulu kwi-80% yotywala kune-30%.
Kutheni i-calculator ithetha ukuba "akukho bushushu obunzima" kwimihla eshushu?
Isikhombisi sobushushu sichazwa kuphela kwiimeko ezishushu - malunga ne-80 °F (27 °C) nangaphezulu. Ezantsi, ubushushu butshintsha ngokulula indlela umoya oziva ngayo, ngoko isixhobo sixela ubushushu bemoya ocacileyo kunokuba bubonakala.
I-index yobushushu ihlukile njani kubushushu obubandayo obusuka kumoya?
Ziyimimiselo ephikisanayo: i-inkomba yobushushu idibanisa ubushushu obubonakalayo okuvela kubushushu obumanzi kwimozulu eshushu, ngelixa ubushushu obubandayo bomoya bususa ubushushu obubonakalayo okuvela kumoya kwimozulu ebandayo. I-inkomba yobushushu ifuna ubushushu nobushushu obumanzi; ubushushu obubandayo bomoya bufuna ubushushu noxinzelelo lomoya.
Ingaba isalathisi sobushushu sikholelwa ekubeni kukho isithunzi okanye ilanga?
Icalculwe ngemibala. Ukukhanya kwelanga okuthe ngqo kunokongeza okuninzi njenge-15 °F kubushushu obuzivayo, ngoko ke ixabiso elizivayo elibonakalayo ngaphandle kwilanga elipheleleyo liphezulu kunenani elibuyiselweyo le kalkuli.
API — sebenzisa le calculator ukusuka kwikhowudi
Nceda le khadi lemali njengendawo esemva ye-JSON ekhululekileyo - akukho qhosha lifunekayo. Thumela amaxabiso endawo ezantsi njengeparameter yombuzo okanye i-JSON. Nantoni na oyenzayo isebenzisa okungagqibekanga okufanayo eli phepha ligqityiwe ngaphambili; iparameter engaziwayo yi 400, ayikho i zero ekhululekileyo. Funda i-API epheleleyo →
Incopho yesiphelo
GET https://calculator.free/api/v1/heat-index/curl
curl "https://calculator.free/api/v1/heat-index/?units=imperial&temp=90&humidity=60"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/heat-index/?" + new URLSearchParams({
"units": "imperial",
"temp": "90",
"humidity": "60"
}));
const data = await r.json();
console.log(data.results);Results are estimates for general guidance only, not financial, medical or tax advice.