17 to 18 percent. That’s the average range loss real-world EVs show once outside temperatures climb past 100°F, according to Recurrent’s analysis of roughly 30,000 electric vehicles. Winter cold still does more damage to range than summer heat — that much hasn’t changed — but the gap between the two isn’t nearly as lopsided as most EV owners assume, and on some models heat now eats into range almost as aggressively as a freezing morning does.
What the Numbers Actually Say
AAA’s own 2026 testing puts real numbers on both extremes. Testing EVs at 20°F, 75°F, and 95°F, AAA found an average 39% range reduction in 20°F cold compared to the 75°F baseline, versus an 8.5% reduction at 95°F. Cold remains the bigger threat by a wide margin in that comparison — researchers attribute it to the energy cost of both battery conditioning and cabin heating, since a resistive heater has to manufacture warmth from scratch. Air conditioning, by contrast, moves heat rather than generating it, which is part of why cooling a cabin costs an EV less energy than warming one.
But AAA’s 95°F test point undersells what happens once temperatures push further into genuinely extreme territory, which is exactly where Recurrent’s larger, real-world dataset picks up the story. At 90°F, Recurrent found EVs lose only about 5% of range — barely noticeable to most drivers. Cross 100°F, though, and that number roughly triples to 17-18% on average. An earlier, smaller Recurrent sample of 7,500
vehicles even found some models losing as much as 31% of range at 100°F, though the company flagged that figure as based on limited data and likely to shift as more readings come in.
Not Every EV Handles Heat the Same Way
The spread between models is where the story gets interesting for anyone shopping used or new. Recurrent’s temperature data shows the Audi e-tron, BMW i4, and Rivian R1S losing only around 2% of range even past 100°F, while the Hyundai Ioniq 5 holds close behind at roughly 3%. On the other end, the Chevrolet Blazer EV has shown losses near 18% in the same conditions, with the Kia Niro EV close behind around 16% and the Tesla Model S around 14%. That’s not a small gap — it’s the difference between a 300-mile EV that still delivers close to 294 miles in a heat wave and one that drops to the 250s.
Recurrent’s research also found that heat pump-equipped vehicles didn’t uniformly outperform vehicles without one in hot weather, which runs counter to what a lot of shoppers assume. At 90°F and 100°F, heat pump-equipped EVs in the dataset actually showed slightly larger losses on average than non-heat-pump EVs — likely because most heat pump systems on the market were engineered primarily to solve the much bigger cold-weather problem, not to optimize summer cooling efficiency.
Why the Two Extremes Aren’t as Far Apart as They Used to Seem
Part of what’s changed isn’t the physics — it’s the data. Older comparisons, including AAA’s original 2019 cold-weather study, focused heavily on how badly EVs performed in freezing temperatures and treated heat as an afterthought. More recent, larger datasets like Recurrent’s are now tracking heat with the same rigor, and what they’re finding is that once ambient temperatures move from “warm” into “actually dangerous to sit in a parked car,” EV range loss stops being trivial. The gap between a 90°F day and a 100°F day is enormous — a tripling of range impact — in a way that a gap between 60°F and 75°F never is.
None of this changes the basic hierarchy: for most EVs, a 20°F morning still costs more range than a 100°F afternoon. But the margin has narrowed as testing has gotten more granular, and for owners in Phoenix, Las Vegas, or the Texas interior — places that spend months at a time above 100°F — the real-world hit to range now looks a lot less like a rounding error and a lot more like a second, quieter version of the cold-weather problem EV owners have been warned about for years.
What Actually Helps
Recurrent’s research points to a handful of practical fixes rather than a technological silver bullet. Keeping a battery above roughly 50% charge during extreme heat reduces the thermal stress that drives both immediate range loss and long-term degradation, and parking in shade or a garage whenever possible cuts down on how hard the battery-cooling system has to work before a trip even starts. Owners shopping specifically for hot climates also have a chemistry option worth knowing: LFP (lithium iron phosphate) battery packs, now used in a growing number of entry and mid-range EVs, tend to tolerate sustained heat better than the nickel-based chemistries that dominate longer-range models. None of it eliminates the loss entirely, but it narrows the difference between a car that quietly loses 5% of its range in a heat wave and one that loses closer to 18%.