Door won't latch since the weather changed? Here's why, and how to fix it

A door that closed fine all summer suddenly won't latch. You push it shut and it bounces back, or you have to lean on it and lift the handle to get it to catch. It happens most as the seasons turn — a run of humid weather, the first cold snap, the swing from one to the other — and it is one of the most common small annoyances in a house. It is also one of the most fixable, usually without buying anything.

The reason is simple: doors move. Wood swells and shrinks with humidity, the house shifts a little with temperature, and hinges and weatherstripping settle over time. Any of that can move the latch a fraction of an inch out of line with the hole it is supposed to drop into — and a fraction is all it takes. This guide covers why it starts right when the weather changes, the checks that fix most doors in a few minutes, and the point where a sticking door stops being a quick adjustment and starts telling you something bigger.

Why it starts right when the seasons turn

• Humidity swelling the wood — a wooden door and its frame take on moisture in damp weather and grow slightly. The door gets tighter in the opening and the latch drifts off its mark. When the air dries out again, it often shrinks back and the problem eases on its own.
• The first cold or the first heat — a big temperature swing moves both the door and the frame, and the two do not always move together. A door that latched in July can bind in October and be fine again by spring.
• Hinges that have loosened — screws back out a little over years of use, and the door sags on its hinges. A sagging door drops the latch below the hole in the strike plate. This one does not fix itself when the weather turns.
• Weatherstripping and paint buildup — a fresh coat of paint on the edge, or compressed weatherstripping that has stiffened, changes how the door sits in the frame just enough to throw off the catch.

First, find where the door is catching

Before adjusting anything, watch what the door actually does. Close it slowly and see whether the latch bolt hits above, below, or to the side of the hole in the strike plate — the metal plate on the frame. If you cannot tell by eye, color the tip of the latch bolt with a marker or a dab of lipstick, pull the door shut against the plate, and open it again. The mark it leaves on the strike plate shows you exactly where the latch is landing, and which way it needs to move. Fixing the right spot is the whole job; guessing at it is how a five-minute fix turns into an afternoon.

The simple checks, in order

• Tighten the hinge screws — start here. Snug every screw on both hinge leaves. If a screw just spins and won't bite, the hole is stripped; back it out and drive one longer screw through into the frame stud behind it. This alone lifts a sagging door back into line and fixes a surprising number of latch problems.
• Check for a gap or rub — look at the even gap around the door. If it is tight on one side or rubbing the frame, the door has shifted or swelled. Tightening the hinges pulls it back toward the hinge side and often opens up the bind.
• Clear the strike plate hole — paint, grime, or a bent plate can keep the latch from seating even when it lines up. Make sure the hole is clear and the plate is flat against the frame.
• Adjust the strike plate — if the latch is landing just barely off, you can file the hole a little larger or reposition the plate so the latch drops in cleanly. If it is off by more than a little, unscrew the plate and move it, filling the old screw holes first so the new screws hold.
• Ease a door that is swollen and rubbing — if the door itself is binding against the frame after tightening the hinges, a light sanding of the spot that rubs can take off enough to close the gap. Go easy; in dry weather the wood shrinks back, and a door sanded too far in a humid month rattles loose in a dry one.

When it's the door, not the latch

Most seasonal latch trouble is a small alignment fix. But a few signs mean the door or the opening itself has moved more than a tune-up will solve. If the gap around the door has gone visibly crooked, if cracks have opened in the wall above the corners of the frame, if several doors and windows in the same part of the house have all started sticking at once, or if the floor near the door feels uneven, the problem may not be the door at all — it can be the house settling or a framing or foundation issue moving the whole opening out of square. That is worth having looked at, because no amount of planing the door will fix a frame that is on the move.

What needs a licensed trade instead

• Structural movement — if the frame is out of square because the house is settling, or you see new cracks, sloping floors, or several openings binding together, that is a job for a contractor or structural pro to assess, not a door adjustment.
• Rot or water damage — a soft, spongy, or stained exterior door frame means water has been getting in. The fix is repairing the source and the framing, which is pro work, not a screw and a file.
• An exterior door that no longer seals or secures — a front or back door that won't latch is a security and weather problem. If tightening and strike-plate adjustment don't get it latching reliably, have it hung and aligned properly rather than living with a door that doesn't lock.
• Anything electrical, gas, or behind a wall — if fixing the opening means moving a wall, a wired-in fixture behind a cover plate, or anything near a gas line, that crosses out of handyman work and into a licensed electrician's, plumber's, or contractor's job. A handyman handles the door and the frame; the trades behind the wall are their own call.

Repair, adjust, or replace

Whether a stubborn door is a quick adjustment or a bigger job comes down to why it moved. A door thrown off by a season of humidity or a few loose screws is almost always an adjustment. A door in a frame that has racked out of square, a rotted exterior jamb, or a door that has warped past the point of sitting flat is where rehanging or replacing starts to make sense — and someone who has the door in front of them can tell you which it is far better than a guess from a description.

If the simple checks don't get it latching, or the signs point to the frame rather than the door, describe what you are seeing — which door, when it started, whether other doors moved too. Roger books one vetted local handyman and confirms the appointment time with you. You see a price range up front, and the pro confirms the price in person after seeing the door. Homeowners pay Roger nothing, and Roger does not add a markup on the pro's price.