Reality Check · Philadelphia, PA
2026 GMC Sierra EV AT4 / Denali in Philadelphia, PA
Winter range, charging cost and how far it goes, worked out for Philadelphia's weather, grid and prices.
Philadelphia's winters are cool rather than cold: on a typical January day (34°F) a Sierra EV AT4 / Denali gets an estimated 357 miles, 13% under its 410-mile rating, about the same as in the coldest week (around January 16, when it averages 34°F). By June it's back to about 427. Charging at home at Pennsylvania's average rate (21.7¢/kWh) costs about $128 a month for 38 miles a day, against $302 for a gas Sierra on the Central Atlantic's gas. And Philadelphia's grid (RFC East), 22% cleaner than the US average, makes it 74% less CO₂ than gas.
Partly estimated. 2 of 5 temperature bands are from 117 real drives of this model; the rest come from 1,548 real drives in EVs at each temperature (and Recurrent's winter study below freezing), applied to its 410-mile rating. Each band switches to its own drives once it has 20 from 3 drivers.
October rangeEstimated
405mi
At Philadelphia's typical October day, 58°F · 35% highway
Winter lowEstimated
355mi
January, 34°F · lows near 26°F
Home chargingEstimated
$128/mo
11.1¢ a mile at 21.7¢/kWh. Gas Sierra: $302/mo
Philadelphia's grid
0.60lb CO₂/kWh
RFC East (EPA eGRID): 22% cleaner than the US, 74% less CO₂ than gas
Philadelphia, season by seasonEstimated
A Sierra EV AT4 / Denali's range on a full charge, averaged over each season's months (30-year normal temperatures), at 35% highway.
Winter Dec–Feb · 37°F
11% below its 410-mile rating · coldest week 355 mi
366mi
Spring Mar–May · 54°F
About its rating
400mi
Summer Jun–Aug · 76°F
5% above its rating
429mi
Fall Sep–Nov · 58°FNow
About its rating
406mi
A Sierra EV AT4 / Denali's range through a Philadelphia yearEstimated
Each month at Philadelphia's 30-year normal temperature, 35% highway. No day of the year averages below freezing.
How far it goes from Philadelphia, on real roadsEstimated
In October, from a full charge with 10% in reserve: about 182 mi out and back, 364 mi one way (January: 321 mi). Dots are DC fast chargers by network.
Fast charging around Philadelphia
PlugLog's map of every public charger. Tesla-only Superchargers aren't counted.
- 156DC fast chargers within 25 mi
- 2.2 mito the nearest
- Tesla Supercharger294 in reach
- ChargePoint285
- EVgo235
- Electrify America131
- Blink102
Road trips in October, about, by road: Syracuse (270 mi) and Richmond (266 mi) one way on a charge.
Questions Philadelphia drivers ask
How far can a Sierra EV AT4 / Denali go in a Philadelphia winter?
About 357 miles on a typical January day (34°F) and about the same in the coldest week of the year (around January 16, 34°F on average), estimated from real EV drives at those temperatures. That's 13% below its 410-mile rating, mostly from heating the cabin and the battery.
How much does it cost to charge a Sierra EV AT4 / Denali in Philadelphia?
About $128 a month at home for 38 miles a day, at Pennsylvania's average home electricity rate of 21.7¢/kWh: about 11.1¢ a mile. A gas Sierra on the Central Atlantic's average gas ($4.31 a gallon) costs about $302 a month for the same driving.
Can I charge a Sierra EV AT4 / Denali on a regular 120 V outlet in Philadelphia?
Not at 38 miles a day: a 120 V outlet adds only about 31 miles in 12 hours on an average day (27 in the coldest week). Plan on 240 V, which fills it from 10% in about 17 hours.
Is it greener to drive electric on Philadelphia's grid?
Yes, more than most places. Philadelphia's grid (RFC East) is 22% cleaner than the US average, so a Sierra EV AT4 / Denali charged on it makes 74% less CO₂ than a gas Sierra.
Check it for your own address
Your street, your daily miles, any temperature on the knob.
Sierra EV AT4 / Denali Reality Check near Philadelphia
Sources: temperatures, 30-year normals (NOAA 1991–2020) at Philadelphia Ne Airport, PA; home electricity, EIA (Pennsylvania, July 2026); gas, EIA weekly (the Central Atlantic); grid CO₂, EPA eGRID 2023; cold-weather range, PlugLog's real drives and Recurrent's winter study (Nov 2025); chargers, Open Charge Map and PlugLog. Updated Oct 22, 2026.