From a very knowledgeable and reputable source,
" Temp H20 Vapor Pressure Reguired RH
66 16.37 80.33%
67 16.95 77.58%
68 17.55 74.93%
69 18.17 72.37%
70 18.79 70.00%
71 19.45 67.61%
72 20.11 65.39%
73 20.81 63.19%
74 21.51 61.13%
75 22.25 59.10%
76 23.00 57.17%
It is not possible to attain an absolute humidity level that will keep cigars from drying out at temperatures below 60 degrees F and beetle hatching and infestation is likely to occur at temperatures approaching 80 degrees F. These observations will put to rest the fallacy that the refrigerator is a good place to store cigars. Not only do we have to worry about our premium cigars beginning to acquire the flavors from left over foods but the cigars will dry out and become essentially unsmokable. The freezer is an even worse place to store cigars. The humidity becomes virtually zero, and the loss of moisture from cigars will accelerate to produce a bone-dry smoke."
Cheers,
grond