AAA Study Finds Electric Vehicles Lose 39% Range in Cold Weather, Operating Costs Surge

Key facts

• AAA tested three EVs and three hybrids at 20°F, 75°F, and 95°F using a chassis dynamometer.
• Cold weather (20°F) reduced EV driving range by 39.0% and efficiency (MPGe) by 35.6%.
• Hot weather (95°F) cut EV range by 8.5% and efficiency by 10.4%.
• Hybrid fuel economy dropped 22.8% in cold and 12.0% in hot conditions.
• EV operating costs increased by $32.11 per 1,000 miles with home charging and $76.93 with public charging in cold weather.
• In hot weather, EV costs rose $6.78 per 1,000 miles (home) and $16.25 (public).
• Hybrid operating costs increased $28.44 per 1,000 miles in cold and $13.02 in hot weather.
• AAA's 2019 study showed similar cold-weather range loss but a larger hot-weather loss of 17%.

The 39% Winter Range Hit

Electric vehicles lose nearly two-fifths of their driving range when temperatures plunge to 20°F, according to new data from AAA released exclusively on May 1, 2026. The tests, conducted at the Automobile Club of Southern California’s Automotive Research Center in Los Angeles, also found that hybrids suffer a 22.8% drop in fuel economy under the same conditions. AAA’s automotive engineering team tested three EVs and three hybrids on a chassis dynamometer — essentially a treadmill for cars — with the cabin HVAC set to 72°F. The laboratory cell was cycled through three temperatures: 20°F, 75°F (the moderate baseline), and 95°F. The results confirm that extreme cold remains the most punishing condition for electrified powertrains.

Heat Performance Improves, Cold Stagnates

Hot weather proved less damaging than in AAA’s 2019 study: EVs lost 8.5% of range at 95°F, down from 17% six years earlier. AAA cautioned that a different vehicle lineup complicates direct comparison, but the improvement suggests advances in battery chemistry, thermal management, and software. Cold-weather performance, however, has barely budged. “There’s been a lot of technology changes — new battery chemistries, more efficient EV designs, fancier software — but the electric vehicles actually didn’t change all that much from back in 2019,” said Greg Brannon, AAA’s director of automotive engineering. The persistence of the winter range penalty underscores a fundamental challenge: cold temperatures slow the electrochemical reactions inside lithium-ion batteries and force the system to divert energy to cabin heating.

The Cost of Cold: $77 More per 1,000 Miles on Public Charging

AAA also calculated the financial toll of temperature extremes. For EVs charged at home, cold weather added $32.11 per 1,000 miles compared to moderate conditions. Using public charging, that figure jumped to $76.93 per 1,000 miles — a 140% increase over home charging costs. Hybrids saw a $28.44 rise per 1,000 miles in cold weather. In hot conditions, the extra cost was $13.02 for hybrids, $6.78 for home-charged EVs, and $16.25 for public-charged EVs. The cost analysis used national average fuel and electricity prices as of March 27, 2026, drawn from AAA’s Gas Price Data.

Testing Methodology and Setting

The tests took place at AAA’s Automotive Research Center, housed in the historic headquarters of the Automobile Club of Southern California — a Spanish Revival building with stucco walls, red tiles, a century-old Moreton Bay fig tree, and a courtyard of oranges and palm trees. Despite the picturesque setting, the lab’s chassis dynamometer allowed engineers to simulate extreme temperatures regardless of the mild April weather outside. AAA conducts these studies at its own expense as part of a broader research program into emerging vehicle technology, aimed at informing its auto club members. The 2026 study builds on a 2019 baseline, though AAA warns that the different vehicle mix prevents a perfect apples-to-apples comparison.

Practical Advice for Drivers

Despite the stark numbers, AAA insists that EVs remain practical in both hot and cold climates — provided drivers plan ahead. “It can be overcome,” Brannon said. “But you have to plan for it.” The key is adjusting expectations: a vehicle rated for 300 miles in moderate weather may deliver only about 183 miles in a 20°F freeze. For hybrids, the cold-weather fuel economy penalty of 22.8% means more frequent trips to the pump. AAA’s data gives consumers a realistic basis for purchasing decisions and year-round driving habits, emphasizing that range loss is predictable rather than a dealbreaker.

Outlook: Technology Gaps Remain

While EVs have made strides in hot-weather efficiency, the cold-weather stagnation highlights an area where innovation has lagged. Battery pre-conditioning, heat pump adoption, and improved insulation could narrow the gap, but AAA’s results show that the 2026 model year vehicles still suffer a 39% range loss in winter. As EV adoption grows in colder regions — from Canada to Scandinavia — the industry faces pressure to address this vulnerability. For now, AAA’s message is clear: know your vehicle’s real-world range, factor in temperature, and charge accordingly.

The bottom line

• EV range drops 39% in 20°F weather; hybrids lose 22.8% fuel economy.
• Hot-weather range loss improved to 8.5% from 17% in 2019, but cold performance is unchanged.
• Public charging in cold weather adds $76.93 per 1,000 miles versus moderate conditions.
• AAA’s tests used a chassis dynamometer with HVAC set to 72°F at three temperature points.
• Drivers can mitigate range loss through planning, but technology has not solved the winter penalty.
• The study provides updated, consumer-focused data for EV and hybrid purchasing decisions.