Temp Goes Down and So Does Humidity!?!?

[Greenwit]

Wondering if this is normal. I've got the Gettysburg humidor....350 count claimed (but really about half that much capacity) and have 70% beads on the bottom and middle and top shelves.

We've had warm weather around here recently and humidity inside the humidor was around 67 to 68 percent. Just where I like it. Ambient temp in the house around 73-75 during the day. Really nice days around here recently....outside temps in the 60s and 70s.

Then cold front moves in last nite temps and stay in the 30s outside, heater goes on, humidity in house goes down. Ambient temp in house is 70 degrees and humidor humidity levels drop to 64%! Never even opened the humidor the past two days.

So does this get back to the whole relative humidity discussion. Do I possibly have a leak? Should I just stop thinking so much and smoke some cigars?