At What Temperature Does THC Degrade? Heat Limits Explained

At What Temperature Does THC Degrade? Heat Limits Explained

Heat is the ingredient that makes edibles work — and past a certain point, the ingredient that quietly unmakes them. Raw flower needs heat to convert THCA into active THC, but keep pushing the temperature and that same THC converts into CBN or evaporates entirely. If your edibles keep coming out weaker than the math says they should be, there's a good chance one of these temperature lines is where the potency went.

The temperature lines that matter

Two things are worth reading off that table. First, the gap between "activated" and "destroyed" is not large — the decarb sweet spot sits only about 60°F below the degradation zone. Second, time matters as much as temperature: THC held at 240°F for three hours degrades meaningfully even though 240°F is "safe" for the standard 40-minute decarb.

Why baking at 350°F doesn't ruin your brownies

The most common worry — "my recipe bakes at 350°F, isn't that way past the limit?" — has a reassuring answer: water. While a brownie or cookie still contains moisture, its interior temperature hovers near 212°F, the boiling point of water, no matter what the oven dial says. The infused butter inside never sees 350°F.

The exceptions are where the water runs out. Thin cookies baked until crisp, edges of an overbaked pan, anything left in until visibly dry — those regions climb toward oven temperature, and potency losses follow. Practical rules: pull baked goods at the early end of the doneness window, favor recipes with some density and moisture, and never spread infused oil on something going under a broiler.

Where potency actually gets lost in home kitchens

Sautéing and frying with infused oil. An uncovered pan over medium-high heat easily passes 300°F at the surface, and THC both degrades and vaporizes. Infused oil belongs in dressings, drizzles, and dishes finished off the heat — not in the frying pan.

Simmering infusions too hot for too long. A crockpot on high or an aggressive stovetop simmer can hold butter above 200°F for hours. Extraction gains flatten out after the first few hours; degradation doesn't. Keep infusions in the 160-200°F range and don't run them all day.

Decarbing hotter to save time. 300°F for 15 minutes does convert THCA — while simultaneously converting a chunk of your new THC into CBN. The decarb calculator shows the standard time, temperature, and efficiency for each method, and our decarboxylation guide covers the technique step by step.

Re-baking already-infused products. Every additional trip through heat costs something. Melting infused chocolate, re-toasting infused bread, microwaving leftovers repeatedly — each round shaves potency.

What overheated THC turns into

Degraded THC doesn't vanish; most of it becomes CBN (cannabinol). CBN is only mildly psychoactive and is commonly described as sedating — which explains the classic overcooked-edible experience: less euphoria, more couch, earlier bedtime. Some people deliberately aim for CBN-heavy edibles for sleep; if that's not what you were aiming for, it just reads as a weak batch.

Terpenes — the aroma and flavor compounds — are more fragile still, with many evaporating well below THC's degradation range. An infusion that's lost its smell has usually already lost its terpenes; the THC may still be intact, but flavor is the canary.

If a batch came out weak and you're not sure heat was the culprit, our checklist of reasons edibles don't kick in walks the other suspects — skipped decarb, weak infusion, and dosing math — in the order worth checking.

FAQ

At what temperature does THC degrade?

THC degradation accelerates meaningfully above roughly 300°F (about 150°C), converting THC into CBN — a mildly psychoactive, more sedating compound. Below that line, time matters as much as temperature: even 240°F will slowly degrade THC if you hold it there long past the decarb window.

Does baking at 350°F destroy THC?

Mostly no, and the reason is water. The inside of brownies, cookies, and cakes stays near 212°F while moisture is still evaporating, so the infused butter or oil inside never reaches oven temperature. Losses climb when the surface dries out — thin cookies baked long, or anything visibly overbaked.

At what temperature does THC evaporate?

THC's boiling point is commonly cited around 315°F (157°C). In an uncovered pan or pot at high heat, THC vaporizes into the air — which is why direct sautéing with infused oil over high heat wastes potency, and why vaporizers are tuned to roughly that range.

What happens to THC when it's overheated?

It converts to CBN (cannabinol) or vaporizes away. CBN is much less psychoactive than THC and is commonly described as sedating — overcooked edibles tend to feel weaker and sleepier, not stronger. Terpenes burn off at even lower temperatures, flattening flavor and aroma first.

What is the best temperature for decarboxylation?

240°F (115°C) for about 40 minutes in the oven is the standard: hot enough to convert THCA to THC efficiently, cool enough to keep degradation minimal. Pushing hotter to save time trades activated THC for CBN — a bad trade. Sous vide at 203°F for 90 minutes is even gentler.

These temperature figures are the commonly cited ranges for home cooking, for adults 21 and over — lab conditions vary, and so do ovens. When in doubt, cooler and longer beats hotter and faster.