2021-06-29 (Updated: 2026-06-16)
Calculate air’s relative humidity after changing its temperature
Summary: This calculator determines the relative humidity of air after it has been heated or cooled. You need to know its starting temperature and relative humidity as well as its target temperature.
This calculator gives an accurate approximation for a temperature range of −45 °C to 60 °C using the recommended formula from the World Meteorological Organization’s Guide to Instruments and Methods of Observation (WMO-No. 8).