Reality Check · San Diego, CA
2025 GMC Sierra EV 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 gets an estimated 383 miles on a charge, about its 390-mile rating. Charging at home at California's average rate (33.6¢/kWh) costs about $211 a month for 38 miles a day, against $436 for a gas Sierra on California's gas. And San Diego's grid (WECC California), 44% cleaner than the US average, makes it 81% less CO₂ than gas.
Partly estimated. 2 of 5 temperature bands are from 116 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 390-mile rating. Each band switches to its own drives once it has 20 from 3 drivers.
October rangeEstimated
372mi
At San Diego's typical October day, 68°F · 35% highway
Winter lowEstimated
383mi
January, 57°F · lows near 45°F
Home chargingEstimated
$211/mo
18.3¢ a mile at 33.6¢/kWh. Gas Sierra: $436/mo
San Diego's grid
0.43lb CO₂/kWh
WECC California (EPA eGRID): 44% cleaner than the US, 81% less CO₂ than gas
San Diego, season by seasonEstimated
A Sierra EV'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 383 mi
384mi
Spring Mar–May · 62°F
About its rating
382mi
Summer Jun–Aug · 71°F
6% below its rating
367mi
Fall Sep–Nov · 67°FNow
4% below its rating
373mi
A Sierra EV'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 167 mi out and back, 335 mi one way (January: 345 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 Supercharger247
- Electrify America154
- EVCS91
Road trips in October, about, by road: Las Vegas (324 mi) and Bakersfield (258 mi) one way on a charge; Phoenix (370 mi) with one fast stop.
Questions San Diego drivers ask
How far can a Sierra EV go in a San Diego winter?
San Diego's winters are mild: about 383 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 390-mile rating.
How much does it cost to charge a Sierra EV in San Diego?
About $211 a month at home for 38 miles a day, at California's average home electricity rate of 33.6¢/kWh: about 18.3¢ a mile. A gas Sierra on California's average gas ($6.03 a gallon) costs about $436 a month for the same driving.
Can I charge a Sierra EV on a regular 120 V outlet in San Diego?
Not at 38 miles a day: a 120 V outlet adds only about 29 miles in 12 hours on an average day (29 in the coldest week). Plan on 240 V, which fills it from 10% in about 10 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 charged on it makes 81% less CO₂ than a gas Sierra.
Check it for your own address
Your street, your daily miles, any temperature on the knob.
Sierra EV 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.