I-Calculator ye-Heat Index
Izinga lokushisa "elizizwa lifana" nokushisa nokushisa, usebenzisa ifomula ye-NWS Rothfusz.
Iziphetho zivuselelwa uma ubhala.
Malunga nale khadi
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 ebuzwa kaningi
Yini i-heat index?
I-heat index, noma izinga lokushisa elibonakalayo, libonisa ukuthi lipholile kangakanani uma ukushisa okufanayo kuxhunywe nezinga lokushisa lomoya. Ukushisa okuphezulu kukhawulela ukukhishwa kwe-sweat, ngakho umzimba ukhipha ukushisa ngokulula futhi uziva ukushisa kakhulu kune-thermometer efunde.
Ifomu elinjani elisetshenziswa yilesi?
I-NWS Rothfusz regression: HI = −42.379 + 2.04901523T + 10.14333127R − 0.22475541TR − … (no-T ku °F no-R ku %), kanye nokubuyekezwa kwe-humidity ephansi kakhulu noma ephakeme kakhulu. Kulungile kakhulu ku-80 °F futhi kupholile.
Yini okusho amazinga ongozi?
Ngokuvamile: 80-90 °F kuyintshisekelo, 90-103 °F intshisekelo ephakeme, 103-124 °F ubuthi (ukushisa noma ukucindezeleka okungahleliwe) no-125 °F noma ngaphezulu kwengozi ephakeme enamandla okushisa.
Kungani ukushisa kwelanga kubangela ukuthi ukushisa kukhulu?
Ukushisa kwesikhumba kupholile uma ukushisa kwesikhumba kukhishwa. Emoya opholile, ophakathi kokushisa, ukukhishwa kwesikhumba kushesha, ngakho umzimba ukhipha ukushisa ngokubi futhi i-90 °F ibonakale ipholile kakhulu ku-80% yokushisa kwesikhumba kune-30%.
Kungani i-calculator ithi "akukho kushisa okucindezelayo" ngosuku olupholile?
I-heat index icacisiwe kuphela kulezi zimo ezibandayo — cishe i-80 °F (27 °C) nangaphezulu. Ngaphansi kwalokhu, ukumanzisa akushintshi kakhulu indlela umoya oziva ngayo, ngakho-ke ithuluzi likhombisa izinga lokushisa lomoya ojwayelekile ngaphezu kwesinye esibonakala.
Uhlobo luni lwezinga lokushisa elihlukile kumoya obandayo?
Ziyizinhlekelele eziphikisanayo: i-heat index ingeza ukushisa okubonakalayo kusuka ekushiseni kwezulu elishisayo, ngenkathi ukushisa kwezulu kususa ukushisa okubonakalayo kusuka ekushiseni kwezulu elishisayo. I-heat index idinga ukushisa nokushisayo; ukushisa kwezulu kudinga ukushisa nokukhawulela kwezulu.
Ingabe i-heat index icabanga ukuthi ikhanya noma ikhanya kakhulu?
Icalculated for shade. Direct sunlight can add as much as 15 °F to the felt temperature, so the real feels-like value outside in full sun is higher than the figure this calculator returns.
API — sebenzisa le calculator kusuka kukhodi
Nquma le calculator njenge JSON evulekile yendawo yokuqeda - akukho isithonjana esidingekayo. Thumela amaxabiso endawo ngezansi njengezilungiselelo zombuzo noma i-JSON. Noma yini ongayishiya isebenzisa iphutha elifanayo elifakwe ngaphambili lekhasi; ipharamitha engaziwa yi-400, ayikho i-zero emnyama. Funda i-API egcwele →
Ingxenye yendawo
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);Izibalo ziyisilinganiso esisetshenziswa ukuqondisa kuphela, hhayi ukucebisa ngezimali, ukwelashwa noma ukukhokha.