When to Switch to Winter Tires (and When to Switch Back)

The 45°F (7°C) rule of thumb

Tire makers commonly point to about 45°F, or 7°C, as the temperature where winter tires start to earn their place on your car. Above that, the all-season or summer tires most drivers use do their job well. As it gets colder, the tread rubber in those tires stiffens and grips less. Summer tires are the first to lose grip, while a winter tire’s rubber is designed to stay flexible in the cold.

The key word is consistently. One chilly October morning isn’t the signal. Watch the trend in your local forecast, and when temperatures are staying around 45°F or lower day after day, it’s time to schedule the swap. In colder parts of the country that point can come weeks earlier than it does in milder regions, so let the thermometer set your calendar, not a fixed date.

Whatever you decide about timing, plan on four winter tires, not two. Tire makers recommend winter tires on all four wheels, no matter whether your vehicle is front-, rear-, or all-wheel drive.

Why the rubber matters more than the snow

People often call winter tires “snow tires,” but much of their advantage shows up on cold, bare pavement. Tread rubber made for warm weather gets harder as the temperature drops, and harder rubber grips the road less. Winter tires use compounds designed to stay soft in the cold, so the tread keeps conforming to the road surface.

The tread design helps too. Winter tires typically have deeper tread and many small slits, called sipes, that add biting edges for snow and ice. As that tread wears down, the sipes and grooves do less, which is why tread depth matters so much on a winter tire (more on that below).

When you shop, look for the three-peak mountain snowflake symbol on the sidewall. It means the tire passed a standardized snow traction test. The older M+S (mud and snow) marking is based on the manufacturer’s own criteria and doesn’t require that test.

If you’re still deciding whether you need dedicated winter tires at all, we cover that question in our comparison of winter and all-season tires. And if you’ve already decided, our guide on choosing the right winter tire for your vehicle walks through what to look for.

Don’t wait for the first snow

Waiting for the first flakes is a common timing mistake. Roads can be cold, wet and slick, with frost on bridges or icy patches in the early morning, well before any snow sticks. And once a storm shows up in the forecast, local tire shops can get busy with drivers who waited.

A calmer plan is to order your winter set a few weeks before you expect temperatures to settle near 45°F, then book the install. Orders from Sansujyuku are processed in 1–2 business days (Monday to Friday), and delivery usually takes 2–3 business days after shipping. Those are estimates, so leave yourself some cushion. Tires ship via UPS or FedEx, and we email tracking when your order ships.

You can also have the tires shipped straight to your installer. Enter the shop’s address as the shipping address and the shop’s name in the Company name field, and call the shop first so they expect the delivery. Shipping is free on orders to the contiguous US (the lower 48 states plus Washington, DC). Our shipping policy has the full details.

When to switch back in spring

Use the same number in reverse. Once temperatures stay above about 45°F, put your all-season or summer tires back on. The soft compound that helps you in January works against you in warmer months. It wears faster on warm pavement and can be damaged by high heat, which uses up tread you’ll want next winter.

Don’t rush it on the first warm weekend, though. Late cold snaps and spring storms happen in many areas, so wait until the warm trend holds. A short overlap is better than getting caught on the wrong tires.

If you run studded winter tires, check your state’s rules. Many states allow studs only during set months, and a few restrict or ban them.

Before you put your winter tires away, measure the tread. Winter tires lose much of their snow grip well before they reach the 2/32-inch wear bars. Tire retailers commonly suggest replacing winter tires somewhere around 5/32 to 6/32 inch of tread. If yours are close to that, plan on a new set before next fall instead of storing tires you won’t want to use.

Should winter tires go on their own wheels?

You have two choices. You can have your winter tires mounted on your current wheels each fall and swapped back each spring, or you can buy a second set of wheels and keep the winter tires mounted on them.

A second set costs more up front, but every swap after that is a simple wheel change instead of a remount. Before you buy one, settle three things:

• TPMS sensors. If your vehicle’s tire pressure monitoring system uses sensors inside the wheels, the winter wheels may need their own sensors, and the system may need a relearn after each swap. Without working sensors, the warning light can stay on all winter and won’t alert you to a real pressure loss. Ask your installer what your vehicle needs.
• Size and fit. Some drivers pick a smaller wheel with a taller tire sidewall for winter. Only use a wheel and tire size approved for your vehicle, with the correct bolt pattern, offset and load capacity and enough brake clearance. Your owner’s manual or a certified tire shop can confirm this.
• Load index and speed rating. Winter tires are often sold with a lower speed rating than the tires they replace. US tire industry guidance generally allows this as long as you keep your speed within the winter tire’s rating, but check your owner’s manual for any limits. Don’t go below the load index your vehicle calls for.

How to store the off-season set

Whether it’s your winter tires in summer or your all-seasons in winter, the storage steps are the same:

1. Clean and dry them. Wash off dirt, road salt and brake dust, pick out stones stuck in the tread, then let everything dry completely.
2. Mark their positions. A piece of tape labeled “front left,” “rear right” and so on helps you and your installer keep track of rotation next season.
3. Bag them. Sealed plastic tire bags help limit the tires’ exposure to ozone, which dries out rubber.
4. Pick a cool, dark, dry spot. Keep them out of direct sunlight and away from heat and ozone sources such as electric motors, furnaces, generators and sump pumps. A cool indoor space, like a basement or climate-controlled room, is better than a hot attic or shed.
5. Store them the right way. Tires mounted on wheels can be stacked on their sides or hung. Loose tires are best stored standing upright on their tread.
6. Reset the pressure. When the tires go back on, set them to the pressure on your door-jamb placard, checked when the tires are cold.

Getting your winter set ready

Start with the tire size on your door-jamb placard or in your owner’s manual, then browse our winter tires. You can also shop by vehicle type, including passenger car tires and SUV and crossover tires. If the tires you’ll put back on in spring are worn out, now is a good time to look at all-season tires too, so both sets are ready when the weather turns.

Winter tires help, but they don’t replace careful driving. Slow down, leave more following distance, and have your tires and installation checked by a certified shop if anything feels off.