Reality Check · Spokane, WA
2026 GMC Sierra EV AT4 / Denali in Spokane, WA
Winter range, charging cost and how far it goes, worked out for Spokane's weather, grid and prices.
Spokane's winters are cool rather than cold: on a typical January day (32°F) a Sierra EV AT4 / Denali gets an estimated 348 miles, 15% under its 410-mile rating, and about 343 in the coldest week (around December 21, when it averages 31°F). By June it's back to about 412. Charging at home at Washington's average rate (14.7¢/kWh) costs about $89 a month for 38 miles a day, about a third of the $374 a gas Sierra costs on Washington's gas. And Spokane's grid (WECC Northwest), 18% cleaner than the US average, makes it 72% 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
393mi
At Spokane's typical October day, 49°F · 35% highway
Winter lowEstimated
343mi
January, 32°F; Dec 21–27 at 31°F · lows near 25°F
Home chargingEstimated
$89/mo
7.7¢ a mile at 14.7¢/kWh. Gas Sierra: $374/mo
Spokane's grid
0.63lb CO₂/kWh
WECC Northwest (EPA eGRID): 18% cleaner than the US, 72% less CO₂ than gas
Spokane, 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 · 33°F
14% below its 410-mile rating · coldest week 343 mi
351mi
Spring Mar–May · 49°F
4% below its rating
393mi
Summer Jun–Aug · 68°F
About its rating
419mi
Fall Sep–Nov · 49°FNow
5% below its rating
391mi
A Sierra EV AT4 / Denali's range through a Spokane yearEstimated
Each month at Spokane's 30-year normal temperature, 35% highway. 41 days a year average below freezing.
How far it goes from Spokane, on real roadsEstimated
In October, from a full charge with 10% in reserve: about 177 mi out and back, 354 mi one way (January: 313 mi). Dots are DC fast chargers by network.
Fast charging around Spokane
PlugLog's map of every public charger. Tesla-only Superchargers aren't counted.
- 34DC fast chargers within 25 mi
- 0.3 mito the nearest
- ChargePoint92 in reach
- FLO73
- Tesla Supercharger69
- Electrify America46
- EV Connect37
Road trips in October, about, by road: Seattle (286 mi) one way on a charge; Boise (359 mi) with one fast stop.
Questions Spokane drivers ask
How far can a Sierra EV AT4 / Denali go in a Spokane winter?
About 348 miles on a typical January day (32°F) and about 343 in the coldest week of the year (around December 21, 31°F on average), estimated from real EV drives at those temperatures. That's 15–16% below its 410-mile rating, mostly from heating the cabin and the battery. Spokane averages 41 days a year below freezing.
How much does it cost to charge a Sierra EV AT4 / Denali in Spokane?
About $89 a month at home for 38 miles a day, at Washington's average home electricity rate of 14.7¢/kWh: about 7.7¢ a mile. A gas Sierra on Washington's average gas ($5.33 a gallon) costs about $374 a month for the same driving.
Can I charge a Sierra EV AT4 / Denali on a regular 120 V outlet in Spokane?
Not at 38 miles a day: a 120 V outlet adds only about 30 miles in 12 hours on an average day (26 in the coldest week). Plan on 240 V, which fills it from 10% in about 17 hours.
Is it greener to drive electric on Spokane's grid?
Yes, more than most places. Spokane's grid (WECC Northwest) is 18% cleaner than the US average, so a Sierra EV AT4 / Denali charged on it makes 72% 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 Spokane
Sources: temperatures, 30-year normals (NOAA 1991–2020) at Spokane Felts Fld, WA; home electricity, EIA (Washington, July 2026); gas, EIA weekly (Washington); 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.