Àwọn Àtòjọ-ìṣàmúlò-ètò

Wá àwọn ààyè ìsàlẹ̀-ilà láti inú àwọn ààyè

Àwọn ààyè-iṣẹ́ —

Bawo ni o ṣe gbọ́ —

Àwọn Àtòjọ-ẹ̀yàn àwọn ìṣàmúlò-ètò

Ńlà àwọn àwọn ààtò àtòjọ-ẹ̀yàn yìí?

Àkóónú ìṣàmúlò-ètò yìí

The dew point is the temperature to which air must be cooled for its water vapour to start condensing into dew, and it is the most honest single measure of how much moisture the air actually holds. A higher dew point means more water in the air and a muggier, stickier feel; it is also the temperature at which fog forms, grass gets damp overnight and a cold drink beads with condensation. This dew point calculator derives it from the air temperature and the relative humidity you enter.

It uses the Magnus-Tetens approximation with the Alduchov-Eskridge coefficients (a = 17.625, b = 243.04 °C): first γ = ln(RH / 100) + aT / (b + T), then the dew point = bγ / (a − γ), with T in °C. As a worked example, air at 25 °C and 60% relative humidity has a dew point of about 16.7 °C — comfortable edging toward sticky. Drop the humidity to 30% at the same 25 °C and the dew point falls to roughly 6 °C, distinctly dry. The method is accurate to within a few tenths of a degree across ordinary weather, and the tool works in either °C or °F.

Dew point predicts comfort far better than relative humidity, because relative humidity depends on temperature: 90% humidity on a cold morning feels dry, while 60% on a hot afternoon feels oppressive. As an absolute measure, dew point cuts through that — below about 13 °C (55 °F) feels comfortable, 16–18 °C (60–65 °F) starts to feel sticky, and above 21 °C (70 °F) is oppressive and hard to cool down in. The same value tells you when condensation will form on windows, pipes and aircraft surfaces.

Àwọn Àtòjọ-ẹ̀yàn

Fómúlà wò nínú àwọn ààtò àwọn ààtò àwọn ààtò

The Magnus-Tetens approximation with Alduchov-Eskridge constants: γ = ln(RH/100) + 17.625·T/(243.04+T), and dew point = 243.04·γ/(17.625−γ), with T in °C. It is accurate to within a few tenths of a degree over normal weather conditions.

Kini idi ti ààyè ìṣàmúlò-ètò bá jẹ́ ìròyìn jú ìṣàmúlò-ètò lọ́wọ́lọ́wọ́?

Relative humidity depends on temperature, so 90% humidity at 10 °C feels dry while 60% at 30 °C feels muggy. Dew point is an absolute measure of moisture, so it tracks how sticky the air actually feels far better.

Àwọn ààyè-iṣẹ́ wo ní àwọn ààyè-iṣẹ́?

Ni isalẹ 13 °C (55 °F) o ni igbadun ati ti o tutu, 16-18 °C (60-65 °F) o bẹrẹ si ni ifẹ ti o ni ifẹ, ati ni oke 21 °C (70 °F) o jẹ ibajẹ ati pe o nira lati fi idiwọ.

Ń lè jẹ́ pé àwọn ààyè-iṣẹ́ ìsàlẹ̀-ilà jẹ́ ìsàlẹ̀-ilà tí o ga jú àwọn ààyè-ilà ojú-ìlẹ́ lọ́wọ́lọ́wọ́?

Kò. Nínú gbogbo àwọn ààyè, àwọn ààyè ìsàlẹ̀-ilà jẹ́ àwọn ààyè, tí a tí n ṣẹlẹ̀ nínú àwọn ààyè àwọn ààyè ààyè 100% tí a bá fi ààyè náà pamọ́. Àwọn ààyè àwọn ààyè àwọn ààyè àwọn ààyè

Bawo ni ààyè ìṣàmúlò-ètò náà ṣè ń tọ́ka sí ìṣàmúlò-ètò náà?

When surfaces or the air cool to the dew point, vapour condenses — that is when dew settles on grass, fog forms and condensation beads on a cold glass. A dew point close to the overnight low is a good sign fog or dew is likely.

Àwọn ààyè-iṣẹ́ àwọn ààyè-iṣẹ́

Kò ní pàtó - àwọn ààyè ìṣàmúlò-ètò náà ń ṣàfihàn àwọn ààyè ìṣàmúlò-ètò tí a tì wa nígbà tí ojú-ìwọ̀n náà bá jẹ́ ààyè àìbálẹ̀. Àwọn ààyè tí a bá pàtó nípa àwọn ààyè ìṣàmúlò-ètò náà nípa àwọn ààyè ìṣàmúlò-ètò àìbálẹ̀ àìbálẹ̀, eyi nípà tí àwọn ààyè ìṣàmúlò-ètò náà jẹ́ àwọn ìṣàmúlò-ètò àìbálẹ̀ à

Ìgbà wo nínú ìṣàmúlò-ètò Magnus-Tetens náà lò?

With the Alduchov-Eskridge coefficients it is accurate to within a few tenths of a degree Celsius across the normal range of weather temperatures and humidities, which is well within the precision of everyday humidity readings.

API — ló àwọn ìṣàmúlò-ètò yìí láti inú ìṣàmúlò-ètò

Fi àwọn ìṣàmúlò-ètò yìí kọ̀ǹpútà yìí láti jẹ́ ààyè-iṣẹ́ JSON tí a tí fi pamọ́ - kò ní bọ́tìnì kan tí a fẹ́. Fi àwọn fálù ààyè-iṣẹ́ sílẹ̀ sí bí àwọn àwọn ìṣàmúlò-ètò àti JSON. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Ka àwọn àkọlé API kíkún →

Àwọn Ààyè Ìjánu-ìṣàmúlò-ètò

GET https://calculator.free/api/v1/dew-point/

curl

curl "https://calculator.free/api/v1/dew-point/?units=c&temp=25&humidity=60"

JavaScript `fetch()`

const r = await fetch(
  "https://calculator.free/api/v1/dew-point/?" + new URLSearchParams({
    "units": "c",
    "temp": "25",
    "humidity": "60"
  }));
const data = await r.json();
console.log(data.results);

Results are estimates for general guidance only, not financial, medical or tax advice.

Àkóónú ìṣàmúlò-ètò yìí

Àwọn Àtòjọ-ẹ̀yàn

Àwọn Ìṣàmúlò-ètò Ìṣàmúlò-ètò

Àwọn Ààyè Ìjánu-ìṣàmúlò-ètò

curl

JavaScript fetch()

JavaScript `fetch()`