The chart below shows various weather stations with their reported temperatures and dew points. Where the numbers are close, the relative humidity is high, when the two are far apart the relative ...

For those interested in the numbers, here are the statewide averages of relative humidity (RH) and dew point for each state. A ranking (1=most, 50=least) is also included.

If it is 100 degrees and the dew point is 72 degrees, relative humidity would be 40 percent. So we meteorologists prefer the consistent message that comes with dew point.

Relative humidity is calculated using meteorological variables such as vapor pressure, saturation vapor pressure, temperature and dew point. Without explaining the equation variable by variable ...

Click here for the National Weather Service Heat Index chart referenced in the episode.Follow Maddie on Twitter @maddie_sofia and Thomas @thomasuylu. You can email Short Wave at ShortWave@NPR.org.