Why it happens
Three things stack up. A cold battery is less efficient and limits regenerative braking until it warms. Heating the cabin takes energy that a gas car gets for free as engine waste heat. And winter driving itself costs more: denser air, wet or snowy roads, and winter tires all add drag.
How much to expect
Around freezing, a loss in the region of 20 to 30 percent compared with mild weather is a common experience, with larger losses in deep cold. Short trips are hit hardest, because the car spends energy warming the battery and cabin and then parks before it benefits. On a long highway drive the penalty shrinks once everything is up to temperature. The Model Y's heat pump helps noticeably compared with older resistive heating.
What actually helps
- Precondition while plugged in. Set a departure time in the app. The car warms the battery and cabin from wall power instead of from the pack. This is the single most effective habit.
- Use seat and steering wheel heat. They warm you directly for far less energy than heating all the cabin air.
- Navigate to Superchargers. Entering the charger as your destination makes the car precondition the battery on the way, which substantially shortens a cold charging stop.
- Keep tires at the recommended pressure. Pressure drops as temperature falls, and soft tires cost range.
- Park inside when you can. Even an unheated garage keeps the pack meaningfully warmer.
Planning road trips
Trust the car's trip planner over the rated range figure. It accounts for temperature, elevation, and speed, and it updates as you drive. In winter, arrive at chargers with a larger buffer than you would in summer, and expect one additional short stop on a long day.
Quirks worth knowing
Frameless windows and flush door handles can freeze in icy conditions. Preconditioning usually frees them, and the app has a defrost function for exactly this. A snowflake icon next to the battery reading means part of the pack's energy is temporarily unavailable until it warms up. It comes back.