# How to Compare Humidity Between Two Cities Before Travel Canonical: https://feelslikeapp.com/articles/compare-humidity-between-cities Published: 2026-09-07 Updated: 2026-09-07 Author: FeelsLike team Compare the same local hours in both cities using air temperature with absolute humidity or dew point. Relative humidity alone is hard to compare because its percentage changes with temperature. Then check feels-like temperature, wind and rain for the hours you expect to be outside. ## Start with the hours you will be outside A daily humidity number is a poor packing guide. Compare the local hours when you expect to walk, eat outside, commute or attend an event. A damp morning in one city and a warm afternoon in another are not like-for-like conditions. FeelsLike shows the next 24 hours for your current location and a destination on the same chart. Use the destination search, then move through the hours that match your plan instead of comparing two daily summaries. ## A humidity percentage is not a city comparison Relative humidity tells you how close the air is to saturation at its current temperature. The percentage changes as air temperature changes, even when the amount of water vapor has not changed much. The [National Weather Service discussion on humidity](https://www.weather.gov/lmk/humidity) explains why temperature has to be part of the comparison. Consider two hypothetical forecasts. Air at 20°C and 80% relative humidity contains about 13.8 g/m³ of water vapor. Air at 30°C and 50% contains about 15.1 g/m³. The warmer city has the lower percentage but the higher moisture amount. You can check other pairs with the [FeelsLike absolute humidity calculator](https://feelslikeapp.com/articles/absolute-humidity-calculator). ## Use absolute humidity or dew point for moisture Absolute humidity reports the mass of water vapor in a cubic meter of air. That makes it useful for comparing hours or places with different temperatures. Our [absolute humidity guide](https://feelslikeapp.com/articles/what-is-absolute-humidity) explains the measurement and why FeelsLike includes it. Dew point is another useful moisture measure. A higher dew point means more water vapor is present. The [National Weather Service comparison of dew point and relative humidity](https://www.weather.gov/arx/why_dewpoint_vs_humidity) shows why dew point often tracks muggy conditions more directly than a percentage alone. Neither number is a comfort verdict. Use it to compare moisture, then add the conditions that will shape the actual outing. ## Check the rest of the forecast before you pack Look at feels-like temperature, wind and rain beside the moisture reading. Direct sun, activity and clothing can also change the experience. A humid evening with a breeze may call for a different plan than a still afternoon at the same moisture level. In FeelsLike, allow location access for the starting forecast and enter the city you are traveling to. The comparison shows apparent temperature, rain probability, relative humidity and absolute humidity for both places. It is a planning view, not a private forecast built for one person. If the feels-like number is unfamiliar, read [what feels-like temperature actually means](https://feelslikeapp.com/articles/what-does-feels-like-temperature-mean) before turning it into a packing rule. ## Know what the comparison cannot tell you Forecasts change, and a city-wide forecast cannot describe every street or hour. Absolute humidity is not a heat-risk score, an air-quality measure, medical advice or a promise that two people will feel the same conditions in the same way. Use local weather authority alerts for heat, storms, flooding and other safety decisions. For an ordinary trip, compare the hours first, use moisture as one part of the picture, and pack for the conditions that would be hardest to adapt to after you arrive. ## Sources - [NOAA Air Resources Laboratory: Moisture Calculator](https://www.ready.noaa.gov/READYmoistcal.php) - [National Weather Service: Dew Point vs. Humidity](https://www.weather.gov/arx/why_dewpoint_vs_humidity) - [National Weather Service: Discussion on Humidity](https://www.weather.gov/lmk/humidity) ## Read next - [How Personal Weather Predictions Work in FeelsLike](https://feelslikeapp.com/articles/how-personal-weather-predictions-work) - [Absolute Humidity Calculator: Temperature and RH](https://feelslikeapp.com/articles/absolute-humidity-calculator) - [What Is Absolute Humidity? Personal Weather Explained](https://feelslikeapp.com/articles/what-is-absolute-humidity) - [Dew Point vs. Relative Humidity: Which Number Explains a Muggy Day?](https://feelslikeapp.com/articles/dew-point-vs-relative-humidity) - [What Does “Feels-Like Temperature” Actually Mean?](https://feelslikeapp.com/articles/what-does-feels-like-temperature-mean) ## Compare your destination before you pack Open FeelsLike, add the city you are traveling to, and compare absolute humidity with feels-like temperature, wind and rain for the hours you will be outside. [Compare two cities](https://feelslikeapp.com/?source=article&article=compare-humidity-between-cities)