Grilled corn takes 12 to 20 minutes, and the size of that spread is the whole story. Husk on over a 450 degree grate runs 15 to 20 minutes. Shucked corn straight on the bars at the same heat is done in 10 to 12. Foil wrapped lands around 15. Every one of those numbers assumes your grate is actually at the temperature you think it is, and that the corn you bought was picked recently.
That second assumption is where most backyard corn falls apart. You can nail the timing to the minute and still serve chewy, bland ears, because supermarket corn that has been sitting for four days has already turned a chunk of its sugar into starch. Heat does not undo that. So the honest answer to how long to grill corn is a range plus three variables, and this page walks through all of them, including what to do when the corn you already bought is past its best.
Grilling times by method and grate temperature
Use grate temperature, not the dial on the lid. More on why below.
| Method | Grate temp | Total time | Turn every | Result |
|---|---|---|---|---|
| Husk on, soaked | 450 to 475 F | 15 to 20 min | 4 to 5 min | Steamed and juicy, mild smoke |
| Husk on, not soaked | 450 to 475 F | 12 to 15 min | 3 to 4 min | More char through the husk, slightly drier |
| Shucked, direct on the grate | 400 to 450 F | 10 to 12 min | 2 to 3 min | Blistered kernels, strongest smoke flavor |
| Shucked over a hot fire | 500 F and up | 6 to 8 min | 90 seconds | Heavy char, easy to dry out |
| Foil wrapped with butter | 400 to 450 F | 14 to 16 min | 5 min | Soft and buttery, no smoke |
| Parboiled then charred | 500 F and up | 3 to 4 min | 1 min | Rescue path for older corn |
| Kernels cut off, on a pan or flat top | 400 F | 5 to 7 min | Stir | Esquites and elote style |
Why the same corn takes different times on two grills
Four things move the clock, and none of them show up in a plain recipe number.
Your lid thermometer is not measuring the grate
The dial sits in the dome, several inches above the food, and it reads air temperature. On most gas grills the grate runs hotter than the dome by a wide margin, and on a charcoal kettle with the coals banked to one side the difference between the two zones can be 200 degrees or more. If your dome says 400 and your grate is really 550, that 10 minute shucked corn is scorched at minute six. This is the single most common reason a timing chart fails someone.
How crowded the grate is
Twelve cold, wet ears on a three burner gas grill will pull the grate temperature down hard for the first several minutes. Add 3 to 5 minutes to any number in the table when you load the grill wall to wall, and give the grill a full 10 minute preheat with the lid closed before the corn goes on.
Lid down or lid up
Husk on corn is really being steamed, and steaming needs the lid closed so heat surrounds the ear. Cook husk on corn with the lid up and you are only heating the side facing the fire, which roughly doubles the time and produces a half cooked ear. Shucked corn is the opposite. Leave the lid up if you want to watch the char and keep the kernels from drying, or close it and shave a couple of minutes off.
How old the corn is
Sweet corn starts converting sugar to starch the moment it leaves the stalk, and the kernel skins toughen as moisture drops. Corn picked that morning at a farm stand cooks faster and tastes sweeter than corn that has been trucked and sat in a chilled display bin. Older corn also needs a different approach, which is the section below.
How to tell grilled corn is done without cutting into it
Timing gets you close. These four checks get you the rest of the way.
- Color and shape. Raw kernels look pale and slightly flat. Cooked kernels go deep, glossy yellow and swell until the rows tighten against each other with no gaps between them.
- The press test. Push one kernel with the back of a fork or the tip of your tongs. It should give a little and release a drop of thick, milky juice. Thin watery liquid means it needs more time. Nothing at all means you have gone past it.
- The squeeze test for husk on corn. Grip the ear through the husk with tongs. A finished ear feels firm and springy. Slack or soft means the kernels are still cool in the middle.
- The husk itself. Browned and papery on at least two sides with blackened tassels is the visual cue. A husk that is still bright green all the way around has not been on long enough.
Overcooked corn has a look all its own. The kernels shrivel and dimple at the top, the surface goes matte instead of glossy, and the ear feels light. At that point no amount of butter brings it back.
Husk on, husk off, or foil
These are not ranked. They solve different problems, and picking the wrong one for your situation is why grilled corn sometimes disappoints even when the timing was right.
- Husk on when the corn is genuinely fresh and you want it juicy, and when you are also cooking something that needs your attention. Husk on corn is forgiving. Two extra minutes will not ruin it.
- Husk off when you want real char and smoke flavor and people are eating within a few minutes of it coming off. Naked corn dries out fast once it leaves the grill, so it does not hold.
- Foil when you are doing a big batch and you want every ear to finish at the same time, or when you want butter, salt, chili and lime to cook into the kernels rather than sit on top. You give up the smoke. That is the trade.
There is a hybrid that gets you both, and it is what we would reach for at a cookout. Grill the ears husk on for 12 minutes so they steam through, then pull them, shuck them fast with a towel over your hand, and put the bare ears back over the hottest part of the grate for 2 minutes, rolling constantly. Tender inside, blistered outside, and the shucking is much easier once the silk has been cooked.
What to do when the corn is already a few days old
This is the part almost nobody covers, and it is the actual reason most home grilled corn is disappointing. If the ear has been off the stalk for three or four days, the kernel skins are tougher and the sugar is lower. Grilling it longer does not soften it. Grilling it longer just dries it.
- Cold salted soak. Peel the husk back, pull the silk, fold the husk up, and drop the ears in cold water with a spoonful of salt for 15 to 30 minutes. This puts moisture back into the husk and buys you a real steam.
- Parboil, then char. The reliable fix. Shuck the ears, boil them in salted water for 3 to 4 minutes, pat them dry, then put them over the hottest part of the grate for 3 to 4 minutes total, turning every minute. The boil handles tenderness, the grill handles flavor. Total time on the grill drops to almost nothing, which means the kernels never get a chance to dry.
- Buy better next time. Pick ears that feel heavy for their size with tight, bright green husks. The tassels at the top should be gold and slightly sticky, not dry, brown or black. Run your thumb up the ear through the husk and feel for plump kernels all the way to the tip. Gaps near the tip mean poor pollination and a disappointing ear.
- Store it right. Husks on, in the fridge, cooked within a day or two. Leaving corn on the counter in a warm kitchen speeds up the sugar loss noticeably.
Fitting corn onto a grill that already has dinner on it
Almost nobody grills corn by itself, which is exactly why a standalone timing number is not much use. Corn is the most cooperative thing on the grate. It is happy on the indirect side, it does not mind sitting an extra few minutes, and it does not need to rest. So it should be planned around the protein, not the other way around.
- With burgers. Corn goes on first. Husk on ears need 15 to 20 minutes, burgers need 8 to 10. Start the corn, then add the burgers when the corn has about 9 minutes left.
- With bone in chicken. Chicken goes on first by a wide margin. Thighs and drumsticks over indirect heat want 25 to 35 minutes. Put the corn on 20 minutes after the chicken and both finish together.
- With steak. Corn on the cool side for the whole cook, steak seared on the hot side at the end. Pull the corn when the steak goes on to rest, wrap it in foil, and it holds fine for the 8 to 10 minutes the steak needs.
- With sausages or hot dogs. Both cook in about 10 to 12 minutes, so shucked corn and sausages can go on at the same time over medium heat.
If you are running charcoal, bank the coals to one side and put the corn on the cooler half. Corn is one of the few foods that genuinely benefits from the two zone setup rather than just tolerating it. A clean burning fuel matters here too, since husk on corn spends a long time absorbing whatever the fire is putting out. If your charcoal smells like lighter fluid, so will the corn, which is one reason we lean toward lump charcoal for anything that sits on the grate this long.
Cooking a dozen ears for a crowd
A standard three burner gas grill fits about 10 to 12 ears if you lay them across the bars rather than along them. Past that you are cooking in batches, and batches are where corn goes cold and rubbery while people stand around.
Two approaches work. The first is to grill everything husk on, then wrap the finished ears in foil and stack them in a covered aluminum pan, or in a small cooler lined with a clean towel. Corn held that way stays hot and stays moist for 45 to 60 minutes. Do not hold bare grilled corn uncovered in a warming tray. It will be leathery in 15 minutes.
The second is to split the cook. Grill the ears husk on earlier in the day, cool them, and refrigerate them still in the husk. When guests arrive, shuck them and give them 3 minutes over a hot grate purely for char. This is the approach we would use for anything over about 16 ears, because the fussy part is done before anyone shows up.
Small grills, balconies, and no yard at all
Corn is bulky, and a lot of people asking this question are working with a two burner or a small kettle. A few workarounds that actually help.
- Cut the ears in half. Halved cobs fit a small grate far better, sit still instead of rolling, and cook 2 to 3 minutes faster. For a tabletop grill this is usually the difference between four ears and eight.
- Renters and apartments. Many leases and local fire codes ban charcoal and open flame grills on balconies, and some ban propane too. Electric tabletop grills are usually the exception that is allowed, and they will char shucked corn fine at 6 to 8 minutes if you preheat them fully first. Check the lease before you buy anything.
- No grill at all. The broiler gets you closer than boiling does. Shucked ears on a foil lined sheet, 6 inches from the element, 10 to 12 minutes, turning every 3. You get blistering without smoke.
- Kids and pets in the yard. Corn is a long cook, which means the grill is hot and unattended more than usual. Park the ears on the indirect side and close the lid rather than standing over an open flame for 20 minutes with a toddler circling.
Corn off the cob on a flat top
If you are making esquites, street corn salad, or anything where the kernels come off anyway, skip the cob stage entirely. Cut raw kernels off the ear and cook them on a griddle surface at around 400 degrees for 5 to 7 minutes, stirring every minute or two until they blister and pop. You get better browning than you ever will on a round cob, and it takes a third of the time. This is one of the small everyday jobs that makes a flat top griddle earn its space on a patio.
Gear that actually changes how your corn turns out
Most corn gadgets are clutter. Three things genuinely move the needle.
An infrared surface thermometer
Every timing number on this page is keyed to grate temperature, and the dome dial on your lid is not measuring that. The ThermoPro TP30 is the straightforward fix. You point it at the bare grate before the food goes on and get the real number in a second or two. The feature that matters for grilling specifically is the adjustable emissivity setting, because shiny stainless bars and dark cast iron grates reflect infrared very differently, and a fixed emissivity gun will read one of them wrong. It also covers a range up to 1022 F, which means it still works on a pizza oven stone or a screaming hot charcoal sear zone.
Corn holders that survive a crowd
Holders are not just a table nicety. Pinned ears are far easier to turn on the grate, and they let you pull a hot cob off without a spatula juggle. The thing to check is the count. A set of 8 gives you four ears at a time, which is a family dinner and nothing more. If you are the one hosting, a 24 piece stainless set covers twelve ears at once, which is what a cookout actually needs, and the anti scald plastic handles matter when the ears come straight off a 450 degree grate.
For a household of four that never cooks more than half a dozen ears, an 8 piece set like the KJ Moderngoods holders is enough and takes up less drawer space.
A slotted grill pan for the off the cob route
Once you cut kernels off the cob, a normal grate is useless. The Weber stainless grill pan solves that with 1/8 inch slits, which is narrow enough that corn kernels stay put but open enough that smoke and heat still reach them, so you get grill flavor instead of pan frying. The wide handles are the other useful detail, since you are lifting a hot pan of loose kernels off a grill with gloves on. It doubles as a way to keep halved cobs from rolling into the flame on a small grate.
What we would skip. Corn specific grilling racks that hold six ears upright take up the same space as the ears themselves and make turning harder, not easier. Long handled tongs and a pair of grill gloves do the same job for less money.
Questions people ask right after this one
Do I have to soak corn before grilling it
Only for the husk on method, and only for 15 to 30 minutes in cold salted water. Soaking naked corn does nothing useful. Soaking overnight is harmless but it does not improve anything past the first half hour.
Can you grill corn without husks and without foil
Yes, and it is the best method for flavor. Shucked ears straight on a 400 to 450 degree grate, 10 to 12 minutes, quarter turn every 2 to 3 minutes. Brush with oil first, not butter. Butter burns at grill temperatures and goes bitter.
Should I boil corn before grilling it
Not for fresh corn. It waters down the flavor for no gain. For corn that has been in the fridge most of a week, a 3 to 4 minute boil followed by a fast char is the best result you are going to get.
Can you overcook corn on the grill
Easily. Past about 22 minutes at 450 the kernels shrivel, dimple and go chewy. Shucked corn over a hot fire can get there in under 10. This is why the doneness checks above matter more than the clock.
How do you reheat grilled corn
Wrap in foil with a small pat of butter and give it 5 to 6 minutes over medium heat, turning once. Better yet, cut the kernels off and hit them in a hot skillet for 2 minutes. Reheated whole cobs are never as good as the first pass, so plan portions accordingly.
Butter before or after grilling
After, for anything cooked bare on the grate. Before is fine when the butter is protected inside foil or inside the husk. On open flame, butter burns long before the corn is done.
Can you grill frozen corn on the cob
Thaw it completely first, pat it dry, and go the foil route with butter for 12 to 15 minutes. Frozen cobs put straight on a grate steam themselves into mush on the outside while the core is still cold.
The short version
Husk on, soaked, 450 degree grate, 15 to 20 minutes with a turn every 4 to 5. Shucked, same grate, 10 to 12 minutes with a turn every 2 to 3. Check the grate temperature rather than trusting the lid dial, add a few minutes when the grill is packed, and press a kernel before you pull anything off.
And if the corn has been sitting in your fridge since last weekend, boil it for four minutes first and use the grill only for the char. That one adjustment fixes more bad grilled corn than any timing tweak ever will.
Last update on 2026-09-14 / Affiliate links / Images from Amazon Product Advertising API
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