Reality Check · San Diego, CA
2026 GMC Sierra EV AT4 / Denali in San Diego, CA
Winter range, charging cost and how far it goes, worked out for San Diego's weather, grid and prices.
Winter barely touches range in San Diego: at a typical January's 57°F, a Sierra EV AT4 / Denali gets an estimated 403 miles on a charge, about its 410-mile rating. Charging at home at California's average rate (33.6¢/kWh) costs about $191 a month for 38 miles a day, against $423 for a gas Sierra on California's gas. And San Diego's grid (WECC California), 44% cleaner than the US average, makes it 82% 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
419mi
At San Diego's typical October day, 68°F · 35% highway
Winter lowEstimated
402mi
January, 57°F · lows near 45°F
Home chargingEstimated
$191/mo
16.5¢ a mile at 33.6¢/kWh. Gas Sierra: $423/mo
San Diego's grid
0.43lb CO₂/kWh
WECC California (EPA eGRID): 44% cleaner than the US, 82% less CO₂ than gas
San Diego, 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 · 57°F
About its rating · coldest week 402 mi
403mi
Spring Mar–May · 62°F
About its rating
410mi
Summer Jun–Aug · 71°F
3% above its rating
423mi
Fall Sep–Nov · 67°FNow
About its rating
418mi
A Sierra EV AT4 / Denali's range through a San Diego yearEstimated
Each month at San Diego's 30-year normal temperature, 35% highway. No day of the year averages below freezing.
How far it goes from San Diego, on real roadsEstimated
In October, from a full charge with 10% in reserve: about 188 mi out and back, 377 mi one way (January: 363 mi). Dots are DC fast chargers by network.
Fast charging around San Diego
PlugLog's map of every public charger. Tesla-only Superchargers aren't counted.
- 186DC fast chargers within 25 mi
- 1.1 mito the nearest
- EVgo390 in reach
- ChargePoint286
- Tesla Supercharger246
- Electrify America154
- EVCS91
Road trips in October, about, by road: Phoenix (370 mi) and Las Vegas (324 mi) one way on a charge; Fresno (391 mi) with one fast stop.
Questions San Diego drivers ask
How far can a Sierra EV AT4 / Denali go in a San Diego winter?
San Diego's winters are mild: about 403 miles on a typical January day (57°F) and about the same in the coldest week (around December 16, 56°F), estimated from real EV drives at those temperatures. That's about its 410-mile rating.
How much does it cost to charge a Sierra EV AT4 / Denali in San Diego?
About $191 a month at home for 38 miles a day, at California's average home electricity rate of 33.6¢/kWh: about 16.5¢ a mile. A gas Sierra on California's average gas ($6.03 a gallon) costs about $423 a month for the same driving.
Can I charge a Sierra EV AT4 / Denali on a regular 120 V outlet in San Diego?
Not at 38 miles a day: a 120 V outlet adds only about 32 miles in 12 hours on an average day (31 in the coldest week). Plan on 240 V, which fills it from 10% in about 17 hours.
Is it greener to drive electric on San Diego's grid?
Yes, more than most places. San Diego's grid (WECC California) is 44% cleaner than the US average, so a Sierra EV AT4 / Denali charged on it makes 82% 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 San Diego
Sources: temperatures, 30-year normals (NOAA 1991–2020) at San Diego Montgomery Fld, CA; home electricity, EIA (California, July 2026); gas, EIA weekly (California); 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.