Reality Check · Chattanooga, TN
2025 GMC Sierra EV in Chattanooga, TN
Winter range, charging cost and how far it goes, worked out for Chattanooga's weather, grid and prices.
Winter barely touches range in Chattanooga: at a typical January's 42°F, a Sierra EV gets an estimated 364 miles on a charge, within 7% of its 390-mile rating. Charging at home at Tennessee's average rate (13.7¢/kWh) costs about $88 a month for 38 miles a day, about a third of the $300 a gas Sierra costs on the Midwest's gas. Chattanooga's grid (SERC Tennessee Valley) is 17% dirtier than the US average, but charging on it still makes 59% 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
380mi
At Chattanooga's typical October day, 63°F · 35% highway
Winter lowEstimated
364mi
January, 42°F · lows near 32°F
Home chargingEstimated
$88/mo
7.6¢ a mile at 13.7¢/kWh. Gas Sierra: $300/mo
Chattanooga's grid
0.90lb CO₂/kWh
SERC Tennessee Valley (EPA eGRID): 17% dirtier than the US, 59% less CO₂ than gas
Chattanooga, 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 · 44°F
6% below its 390-mile rating · coldest week 364 mi
367mi
Spring Mar–May · 62°F
3% below its rating
376mi
Summer Jun–Aug · 79°F
8% below its rating
357mi
Fall Sep–Nov · 63°FNow
4% below its rating
373mi
A Sierra EV's range through a Chattanooga yearEstimated
Each month at Chattanooga's 30-year normal temperature, 35% highway. No day of the year averages below freezing.
How far it goes from Chattanooga, on real roadsEstimated
In October, from a full charge with 10% in reserve: about 171 mi out and back, 342 mi one way (January: 328 mi). Dots are DC fast chargers by network.
Fast charging around Chattanooga
PlugLog's map of every public charger. Tesla-only Superchargers aren't counted.
- 34DC fast chargers within 25 mi
- 1.3 mito the nearest
- ChargePoint372 in reach
- Tesla Supercharger183
- EVgo132
- EV Connect97
- Electrify America64
Road trips in October, about, by road: Memphis (334 mi) and Columbia (321 mi) one way on a charge; Cincinnati (356 mi) with one fast stop.
Questions Chattanooga drivers ask
How far can a Sierra EV go in a Chattanooga winter?
Chattanooga's winters are mild: about 364 miles on a typical January day (42°F) and about the same in the coldest week (around January 11, 41°F), estimated from real EV drives at those temperatures. That's within 7% of its 390-mile rating.
How much does it cost to charge a Sierra EV in Chattanooga?
About $88 a month at home for 38 miles a day, at Tennessee's average home electricity rate of 13.7¢/kWh: about 7.6¢ a mile. A gas Sierra on the Midwest's average gas ($4.14 a gallon) costs about $300 a month for the same driving.
Can I charge a Sierra EV on a regular 120 V outlet in Chattanooga?
Not at 38 miles a day: a 120 V outlet adds only about 29 miles in 12 hours on an average day (28 in the coldest week). Plan on 240 V, which fills it from 10% in about 10 hours.
Is it greener to drive electric on Chattanooga's grid?
Yes. Chattanooga's grid (SERC Tennessee Valley) is 17% dirtier than the US average, but a Sierra EV charged on it still makes 59% 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 Chattanooga
Sources: temperatures, 30-year normals (NOAA 1991–2020) at Chattanooga Lovell Airport, TN; home electricity, EIA (Tennessee, July 2026); gas, EIA weekly (the Midwest); 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.