Temperature swings do more damage than humidity does
Heat wakes beetles. Movement cracks wrappers. The average is the least interesting number.
Keep it under 21 °C and keep it still. Above roughly 24 °C tobacco beetle eggs can hatch; below that, the thing doing damage is not the temperature itself but how much it moves in a day.
The threshold that actually matters
Lasioderma serricorne — the tobacco beetle — lays eggs in the leaf long before you buy the cigar. They stay dormant in cool conditions and hatch when it gets warm enough, usually quoted around 24 °C. What you find afterwards is a pinhole in a wrapper and, if you are unlucky, a box that has to be frozen or thrown away.
This is the single strongest argument for keeping a humidor out of a warm room. Everything else about temperature is comfort; this part is loss.
Why the swing matters more than the number
Relative humidity is relative to temperature. Warm air holds more water, so the same amount of moisture reads as a lower percentage when the room heats up and a higher one when it cools. A humidor next to a radiator does not just get warm — it appears to lose humidity every afternoon and regain it every night, and your packs chase that phantom all day.
Meanwhile the cigars themselves expand and contract with each cycle. That is what separates a wrapper from its binder, and it is why a stable, slightly-wrong setup outlives a perfect one that lives in the sun.
Do this: put your hand on the humidor at midday and again at midnight. If it feels different, the box is in the wrong place — and no humidification pack will fix a location problem.
Where to put it in a normal home
- Interior wall, not exterior. Exterior walls follow the weather.
- Away from windows. Direct sun through glass will cook a box in an hour.
- Not on top of anything electrical. Fridges, consoles and TV units all radiate heat upward.
- Low, not high. The floor of a wardrobe is the calmest place in most rooms; the top of a bookshelf is the warmest.
And cold, which is less of a problem than people think
Cool storage is fine and slows ageing rather than harming it — cigars kept at 15 °C simply mature more slowly. The risk with cold is condensation when you bring cigars back to room temperature quickly. Let a travelled box come up to room temperature sealed, over several hours, before opening it.
When something goes wrong, dates are the evidence
If a lot turns out to have a problem, the useful question is when it arrived and what else came at the same time. Ligero keeps each lot separate with its own arrival date and its own humidor, so isolating one delivery — or noticing that everything from one summer behaved the same way — is reading a list rather than reconstructing a year from memory.
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