Cigar Humidity Explained: 62%, 65%, 69% or 72% RH?

Ask ten cigar smokers what humidity to store at and you will hear 70% from most of them. The number comes from a rule of thumb, 70 degrees and 70 percent, that has been repeated for decades. It is not wrong so much as imprecise, and for a lot of collections it is slightly too wet.

What relative humidity does to a cigar

A cigar is dried, fermented leaf. Its moisture content governs how tightly the filler sits, how readily the wrapper flexes, and how evenly it burns. Store it too dry and the wrapper cracks, the burn runs hot and fast, and the flavour turns harsh. Store it too wet and the draw tightens, the cigar struggles to stay lit, the burn goes uneven, and you risk mould and tobacco beetles.

The workable band is roughly 62% to 72% RH. Within that band, the differences are real but subtle, and they interact with the cigar's size and your own preference.

62% RH

The driest of the common levels. Cigars stored at 62% light easily, draw freely and burn cleanly. Ring gauge matters here: thicker cigars have more filler to keep lit, and they tend to do well slightly drier.

This level suits humid climates, where opening the box regularly lets ambient moisture in, and it suits anyone who has fought with tight draws. It is also the safest level against mould. The trade-off is that some smokers find the flavour a touch sharper and less rounded.

65% RH

The most broadly useful setting, and where we would point most people starting out. It is dry enough to burn reliably and wet enough to keep wrappers supple. If you store a mixed collection of sizes and origins and do not want to think about it, 65% is the sensible default.

69% RH

Closest to the traditional 70% and the most popular single choice. Cigars feel plumper in the hand, wrappers are noticeably more pliable, and many smokers find the flavour fuller and sweeter. Thinner ring gauges and long-aged cigars often show best here.

The caution is that 69% leaves less margin. In a warm room, higher moisture plus higher temperature is the combination that wakes tobacco beetles. Keep the temperature under about 21 degrees Celsius and it is not a concern.

72% RH

A specialist setting. Some collectors use it for long-term aging, on the argument that slightly wetter storage slows the process and develops flavour over years rather than months. It is not a level to smoke from directly; most people who store at 72% move cigars down to a drier box for a week or two before smoking.

Temperature matters as much as humidity

Relative humidity is relative to temperature, which is why the two cannot be separated. Warm air holds more moisture, so the same water content reads as a lower RH when the room warms and a higher RH when it cools. A humidor that reads 65% at 18 degrees may read closer to 72% if the room drops overnight.

Aim for 16 to 22 degrees Celsius. Above roughly 24 degrees, combined with humidity above 70%, you enter the range where beetle eggs can hatch. This is the single strongest argument for a climate-controlled cabinet over a passive box: it holds both variables rather than one.

How to choose

• Humid climate, or you open the box daily: 62%
• Mixed collection, no strong preference: 65%
• Dry climate, thin ring gauges, or you prefer a fuller feel: 69%
• Long-term aging, with a separate smoking box: 72%

Whichever you choose, consistency beats precision. A cigar held steadily at 65% is in better condition than one that swings between 60% and 72% every week. Fluctuation is what cracks wrappers, because the leaf expands and contracts against itself.

Holding the level

Two-way humidity packs are the simplest way to hold a set point. They release moisture when the air is dry and absorb it when the air is wet, so they correct in both directions and cannot overshoot. Choose the RH rating you want and match the pack size to your capacity. Browse the full range of Boveda humidity packs.

Check your hygrometer against a calibration kit before trusting any of these numbers. And if you are managing a large collection, a climate-controlled cabinet holds both temperature and humidity to a set point without ongoing intervention.

Not sure which level suits your collection? Ask us and we will talk it through.