Optimal Cannabis Storage Conditions: Temperature and Humidity Guide
Discover the perfect storage conditions for cannabis to maintain its potency and quality, focusing on temperature and humidity control.
The short answer: store cannabis in an airtight glass jar, hold relative humidity between 58% and 62%, and check it with a small digital hygrometer every few days. Flower that dries below that range crumbles and loses terpenes, while flower above it invites mold. The steps below cover how to maintain humidity in cannabis jar storage so every session tastes like the first one.
Optimal Cannabis Storage Conditions: Temperature and Humidity Guide
What humidity level should a cannabis jar be?
Aim for 58–62% relative humidity at room temperature, with 62% being the usual target for flower you will smoke within a few months and 58% better for longer holds. Keep the jar out of direct sun and away from radiators, which swing the reading fast.
cannabis humidity control pack
Key Features
- Airtight glass jar with a rubber-gasket lid that seals without letting air creep back in
- Two-way humidity control pack rated at 62% (or 58% for long-term curing)
- Compact digital hygrometer that fits inside the jar and reads to within a couple of points
- Amber or opaque glass, or a dark cupboard, to block UV light that degrades THC
- Jar size matched to the amount of flower, filled about three-quarters full with a little headspace
- Labels for strain name and the date the jar was filled, so nothing sits forgotten
- Spare humidity packs on hand so a dried-out pack is swapped the same day
Do humidity packs really work in a jar?
Yes. Two-way packs both release and absorb moisture, so they pull a too-wet jar down and a too-dry jar back up to their rated level. They work only in a sealed container, so a jar with a worn gasket will defeat them.
cannabis storage humidity 62 percent
On materials, borosilicate and thick soda-lime glass are the safest choices because they do not hold odors or leach into flower the way thin plastic can. Look for a lid with a food-grade silicone gasket and a stainless-steel clasp, and size the humidity pack to the jar volume listed on its packaging. A hygrometer rated to about ±2% accuracy is close enough for home storage, and it is worth calibrating once with a salt test before trusting the reading.
How often should you open the jar?
Burp a freshly filled jar once a day for the first week, then once a week after that, opening it for a minute or two and resealing. Every opening exchanges air, so keep casual sniffing to a minimum once the humidity has settled.
Orders ship in discreet, odor-proof packaging with tracking, and jars and humidity accessories are packed so glass arrives intact. Unopened storage accessories can be returned within the stated window, and if anything arrives cracked or short, the support team will replace it — full details live on the shipping and returns pages.