How to Winterize & Store Your Grill

Why Winterizing Actually Matters

A grill left uncleaned and uncovered over winter doesn't just look neglected — it actively degrades. Grease residue attracts moisture and accelerates rust on burners, grates, and internal components. Left-in propane tanks and pellets can develop moisture problems of their own. A half hour of prep in the fall routinely saves an entire season's worth of maintenance headaches (or a full grate replacement) in the spring.

Universal Steps for Every Grill Type

Deep clean before storage, not after. Grease and food residue left over winter bonds to metal surfaces far more stubbornly than fresh grime. Scrub grates, clean out the grease trap, and wipe down interior surfaces before the first freeze.

Dry everything completely. Any moisture trapped under a cover accelerates rust rather than preventing it. Let the grill air dry fully before covering.

Use a properly fitted cover. A cover cut for your exact model does a far better job than a generic tarp, which traps condensation against the metal. Vented, breathable covers outperform fully sealed plastic ones for long-term storage.

Elevate off wet ground if storing outdoors. Even a couple of inches of clearance from concrete or soil reduces moisture wicking into the base and wheels.

Gas Grills

Disconnect and store the propane tank separately, upright, in a well-ventilated outdoor location — never in a garage, basement, or enclosed space. Inspect the regulator hose for cracking before spring use. Coat exposed metal fittings lightly with a food-safe lubricant to prevent seizing over winter.

Charcoal Grills

Fully empty the ash catcher — old ash absorbs moisture and can corrode the metal it sits against over months of storage. Check vents and dampers for rust and lubricate hinges if they've started to stick.

Pellet Grills

Empty the hopper completely. Pellets left in a hopper over winter absorb ambient moisture, swell, and can jam the auger on your first spring cook — this is one of the most common "my pellet grill won't start" service calls. Store leftover pellets in a sealed, airtight container indoors instead. Clean the fire pot and auger tube of accumulated ash, and check the drip tray for grease buildup that can harden over the off-season.

Indoor vs Outdoor Storage

If you have garage or shed space, moving a grill indoors for winter is the single best thing you can do for its longevity — it eliminates freeze-thaw cycling, UV exposure, and most humidity swings entirely. The exception is propane tanks, which must always stay outdoors regardless of where the grill itself is stored, per standard safety guidance from propane suppliers and fire codes in most jurisdictions.

If indoor storage isn't an option, a covered patio or a dedicated grill shelter cuts down on direct precipitation exposure even without full enclosure, and is a meaningful step up from leaving a grill fully exposed in an open yard.

Common Winterizing Mistakes

Covering a wet or greasy grill. Sealing in moisture or grease residue under a cover accelerates the exact damage a cover is supposed to prevent. Always clean and fully dry before covering, not after.

Using a generic tarp instead of a fitted cover. Loose tarps trap condensation against the metal and can actually cause more rust than leaving a grill uncovered in a well-ventilated spot. A properly fitted, breathable cover is worth the modest cost.

Forgetting the propane tank entirely. A tank left connected and exposed to winter weather is both a safety consideration and a source of regulator wear. Disconnect and store it properly, checked and separate from the grill.

Ignoring rodent access. Grills stored for months, especially pellet grills with sawdust-adjacent hoppers, can attract mice looking for nesting material or leftover grease. A sealed hopper lid and periodic winter check-ins reduce this risk considerably.

Mid-Winter Check-Ins

Even a properly winterized grill benefits from an occasional check partway through the off-season, especially after major storms or extended freeze-thaw cycles. A five-minute look under the cover for pooled water, signs of pest activity, or a cover that's shifted or come loose catches small problems before they compound over several more months of exposure. This matters most in regions with genuinely variable winter weather — heavy snow load followed by a thaw and refreeze is a common scenario that stresses covers and seals more than steady cold ever does.

Grill-Specific Cover Fit Matters

A cover that's too large flaps in wind and lets driven rain or snow work underneath at the edges; one that's too tight can trap moisture against the surface with poor airflow. Manufacturer-specific covers, sized to the exact model, consistently outperform generic "universal fit" covers on both counts. If your grill's exact model cover isn't available, measuring your unit's width, depth, and height before shopping for a generic replacement avoids a frustrating mismatch discovered only after the first real storm of the season. When in doubt, size slightly up rather than down — a cover with a bit of extra room and a cinch strap at the base is more forgiving over time than one that's a tight squeeze over the hood, which tends to stretch and tear at the seams after repeated on-and-off use across a full winter season.

One final consideration: replace a cover once it starts showing wear rather than stretching its useful life to the breaking point. A cover with a small tear or a failing seam does less to protect your grill than an intact one, and the modest cost of a replacement is cheap insurance against a full winter of exposure through a gap you didn't notice until spring.

Spring Startup Checklist

• Inspect grates and burners for rust; season cast iron grates with a light oil coat if needed
• Check gas lines and connections for cracking or brittleness before reconnecting propane
• Run pellet grills empty for 10-15 minutes to burn off any residual moisture in the system before cooking
• Replace any pellets that were stored improperly or feel damp — they won't burn cleanly
• Test the igniter or auger function before your first real cook, not during it