How Weather Affects Your Vehicle

Ontario has some of the most extreme weather swings in North America. From -30°C windchill in January to +35°C humidex in July, your vehicle endures a 65-degree temperature range every year. Each season attacks different parts of your car.

Winter (-30°C to 0°C)

Cold thickens oil, drains batteries, stiffens rubber, and contracts metal. Road salt corrodes the undercarriage, brake lines, and body panels. Frost heaves create potholes that damage suspension and knock alignment out. This is the season that does the most cumulative damage to Ontario vehicles.

Spring (0°C to 15°C)

Freeze-thaw cycles are the worst for roads and your car. Potholes peak in March and April. Salt residue continues corroding until washed off. Moisture gets into everything that contracted during winter. Spring maintenance is about assessing and repairing winter damage.

Summer (20°C to 35°C)

Heat accelerates battery degradation internally (the failure shows up the following winter). UV radiation fades paint and cracks rubber components. Hot pavement increases tire wear. Cooling system failures are the most common summer breakdown. AC components get heavy use and may need servicing.

Fall (5°C to 15°C)

Wet leaves on road surfaces are surprisingly slippery. Temperature drops begin affecting tire pressure. This is the critical preparation window for winter — the work you do in September and October determines how well your car handles the next five months.

Each season has its own maintenance priorities. Following our seasonal checklists is the most effective way to protect your vehicle against Ontario's relentless weather.