RH = relative humidity right? relative to... temperature.

The ratio of the amount of water vapour in the air at a specific temperature to the maximum amount that the air could hold at that temperature, expressed as a percentage.

The CHE increases the air temp with increases the saturation density of the air changing the RH. The tricky bit is the amount of water in the air remains the same.

Ball pythons need about 15.5 gm/m3 of water in the air to shed. (know you know you are concerned with boas... I don't have that info on hand)

That means different RH at different temps.

at 5ºF (for dramatic example) 15.5 is 1600% clearly not possible but it demonstrates the situation.
@ 70ºF 15.5 gm/m3 is 84%RH
@ 75ºF 15.5 gm/m3 is 71%RH
@ 80ºF 15.5 gm/m3 is 60%RH
@ 82ºF 15.5 gm/m3 is 57%RH
@ 85ºF 15.5 gm/m3 is 52%RH

You see the point. All you need to know to work it out is the temp and RH% that is good shed level, then a chart for Saturated Vapour Pressure (water). It will tell you what the gm/m3 is and then take your %rh and take that of the Saturated Vapour Pressure.

If you want PM me the correct %RH at the correct ambient air temps and I can work out the shifts for you.