Therefore, a 70-degree day with 50% relative humidity would feel more humid than a 40-degree day with 100% relative humidity. This is the result of higher dew points, says the Weather Service.

Relative humidity doesn’t quite capture that the same way,” says Arnold. “I think it gives a better and more accurate sense of what the humidity is going to be like.” ...

We tend to measure humidity in terms of Relative Humidity (RH). This looks at how much water vapour there is in the air compared to how much there could be at that temperature.

However, the relative humidity in this case would only be 52%, giving no indication of the true feel of the air. Dew point and frost or snow The dew point is also a useful measure in other seasons.

A two-day heat event is expected to begin Thursday, with the humidity making it feel like the temperature is in the mid-40s.

To find out, let’s dive into what dewpoint is and what relative humidity is. Dewpoint is a more direct measure of moisture in the air. So as the air cools to the dewpoint temperature, the air ...

So relative humidity can be 100% while it’s 30 degrees outside, but since it’s cold, it doesn’t feel humid. That’s because a dew point at 30 degrees is some extremely dry air.

For example, when the air temperature is 100 degrees Fahrenheit, and the relative humidity is 55 percent, the heat index can shoot up to a sweltering 124 degrees Fahrenheit. And that’s in the shade.