A drawer that sticks in July is not just annoying. It is a structural failure in progress.
Here is why.
Wood's fatigue exponent for tension perpendicular to the grain is 14.7. That number means damage from a hard pull does not scale up linearly with force. It scales with force raised to the power of 14.7. A stuck drawer that takes 70 newtons to open, roughly the weight of 7 kilograms, is 6.6 billion times more damaging per cycle than a light 15-newton nudge.
Run that through a real load distribution. On a typical dresser drawer with a router-cut baseline joint, if 5 percent of your daily pulls are stuck-drawer force, those 5 percent account for 93 percent of total fatigue damage. Service life collapses from 29 years to 6 months.
Six months.
The other 95 percent of pulls, the ones where the drawer opens easily, contribute almost nothing to joint wear. The entire fatigue story is in the occasional hard yank when the wood has swollen against the opening.
So the intervention is not a stronger joint. It is a drawer that does not bind.
Traditional cabinetmakers solved this before the physics existed to explain it. The classic American combination of cherry cases with poplar drawer boxes is not just a cost choice. It is a designed-in seasonal solution.
Cherry's tangential shrinkage coefficient is 0.00284. Poplar's is 0.00239. That gap means the cherry case opening expands more across its height in summer than the poplar drawer box does. The opening grows faster than the drawer. Net result: more clearance in humid weather, not less. The drawer runs freer in July, which is exactly when you need it to.
Non-classic combinations can go the other way. Hard maple drawer sides in a cherry case have a higher shrinkage coefficient than the case material. That drawer tightens in summer. The binding is engineered into the species pairing, not noticed until the second July. If your drawer side material expands more than the case opening, you have built seasonal binding into the joint before you touched the glue.
The practical rule: verify that your drawer side material has a lower tangential shrinkage coefficient than your case material. Poplar is lower than every common American furniture wood. That is why it ended up in every dresser drawer in the country.
If you are already committed to a non-classic combination, fit the drawers in summer at peak shop humidity. A drawer fitted with clearance in August will run freely all year. A drawer fitted snug in January will bind by July, and binding a few times a week through one summer is enough to matter structurally.