Seasonal Electric range may vary from 10% to 40. It is essential to consider this when choosing a vehicle. A model’s indicated range is an annual average: during spring, summer and autumn, the car will often yield a higher mileage, while in winter it will be lower.
Seasonal Variations of Electric Range.
100% = range as announced by the manufacturer
Evaluating daily range
Since a model’s announced range is an annual average that varies with seasons, when estimating your daily trips, include a safety margin of about 40% for winter conditions.