Dew Point Calculator
Calculate the dew point from temperature and humidity, to judge how muggy it feels.
The real measure of muggy
The dew point is the temperature at which air becomes saturated and moisture starts to condense, and it is a better guide to how humid and sticky the air feels than relative humidity alone. This calculates it from the temperature and relative humidity, so you can gauge comfort — a high dew point is what makes a warm day feel oppressive and sleep difficult.
Enter temperature and humidity, and see the dew point.
Why dew point beats humidity for comfort
Relative humidity is misleading for comfort because it depends on temperature — cold air at a high percentage still feels dry, while warm air at a lower percentage can feel sticky. The dew point is absolute: it tells you how much moisture is actually in the air, regardless of temperature. That is why meteorologists lean on it. As a rough guide, a dew point below the mid-teens Celsius feels comfortable, the high teens feels muggy, and the twenties feels oppressive — which is often more telling than the humidity percentage the forecast shows.
Frequently asked questions
Why is dew point a better comfort guide than humidity?
Relative humidity depends on temperature, but dew point is absolute — it reflects the actual moisture in the air, so it tracks how sticky it feels.
What dew point feels comfortable?
Roughly, below the mid-teens Celsius feels comfortable, the high teens feels muggy, and the twenties feels oppressive.
Is anything uploaded?
No. The calculation happens in your browser.