Duane Bozarth wrote:

...there's a definite relationship between dewpoint, temperature (wet
and dry), and relative humidity...

Indeed. Td = Ta/(1-Taln(R)/9621), approximately, with the Ts in degrees
Rankine and R = RH/100. For instance, 70 F (460+70=530 R) air at 50% RH
has dew point Td = 530/(1-532ln(0.5)/9621) = 510.5 R, ie 50.5 F.

Nick