Calculate dew point temperature from air temperature and humidity
This dew point calculator uses the Magnus formula to compute the dew point temperature from air temperature and relative humidity. The dew point is the temperature at which air becomes saturated and water vapor begins to condense.
The dew point is a more reliable measure of atmospheric moisture than relative humidity alone. A higher dew point indicates more moisture in the air.
Dew points below 55°F (13°C) feel dry and comfortable. Between 55–60°F (13–16°C) feels comfortable to slightly humid. At 60–65°F (16–18°C) it feels noticeably humid. Above 65°F (18°C) it feels uncomfortable, and above 70°F (21°C) it feels oppressive or miserable.
Relative humidity is the percentage of moisture in the air relative to the maximum it can hold at that temperature. Dew point is the actual temperature at which condensation occurs. Dew point is a direct measure of moisture content, while relative humidity changes with temperature even if moisture stays constant.