I use the following rule of thimb that Sandra posted a bit back:
You should aim for a humidity of 45-65%. It will spike during misting of course
For adult male panthers, the temperature can be up to 90F / 32C in the hottest basking spot near the top of the cage, and at the opposite, lower end of the enclosure it should be 70-80F / 21-26C during the day. A night time drop in temp is necessary (as low as 65F / 18C is good). Adult females should be kept a little cooler during the day, if youre not breeding. Her basking area should not exceed 84F/29C.
A sub-adults daytime basking spot up to 81F/27C, daytime cooler ambient range 70-75F /21 -23C, and at night to a low of 68F/20C.