Reality Check · New Haven, CT
2025 GMC Sierra EV in New Haven, CT
Winter range, charging cost and how far it goes, worked out for New Haven's weather, grid and prices.
In a typical New Haven January (31°F), a Sierra EV gets an estimated 308 miles on a charge, 21% less than its 390-mile rating, and about 305 miles in the coldest week of the year (around January 20, when it averages 30°F). By May it's back to about 386. Charging at home at Connecticut's average rate (24.2¢/kWh) costs about $160 a month for 38 miles a day, against $307 for a gas Sierra on New England's gas. And New Haven's grid (NPCC New England), 30% cleaner than the US average, makes it 75% 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
381mi
At New Haven's typical October day, 55°F · 35% highway
Winter lowEstimated
305mi
January, 31°F; Jan 20–26 at 30°F · lows near 22°F
Home chargingEstimated
$160/mo
13.9¢ a mile at 24.2¢/kWh. Gas Sierra: $307/mo
New Haven's grid
0.54lb CO₂/kWh
NPCC New England (EPA eGRID): 30% cleaner than the US, 75% less CO₂ than gas
New Haven, 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 · 33°F
18% below its 390-mile rating · coldest week 305 mi
321mi
Spring Mar–May · 49°F
5% below its rating
370mi
Summer Jun–Aug · 72°F
6% below its rating
366mi
Fall Sep–Nov · 55°FNow
4% below its rating
375mi
A Sierra EV's range through a New Haven yearEstimated
Each month at New Haven's 30-year normal temperature, 35% highway. 43 days a year average below freezing.
How far it goes from New Haven, on real roadsEstimated
In October, from a full charge with 10% in reserve: about 171 mi out and back, 343 mi one way (January: 277 mi). Dots are DC fast chargers by network.
Fast charging around New Haven
PlugLog's map of every public charger. Tesla-only Superchargers aren't counted.
- 60DC fast chargers within 25 mi
- 0.8 mito the nearest
- ChargePoint392 in reach
- Tesla Supercharger230
- EVgo183
- Electrify America115
- EV Connect83
Road trips in October, about, by road: Harrisburg (274 mi) and Syracuse (254 mi) one way on a charge.
Questions New Haven drivers ask
How far can a Sierra EV go in a New Haven winter?
About 308 miles on a typical January day (31°F) and about 305 in the coldest week of the year (around January 20, 30°F on average), estimated from real EV drives at those temperatures. That's 21–22% below its 390-mile rating, mostly from heating the cabin and the battery. New Haven averages 43 days a year below freezing.
How much does it cost to charge a Sierra EV in New Haven?
About $160 a month at home for 38 miles a day, at Connecticut's average home electricity rate of 24.2¢/kWh: about 13.9¢ a mile. A gas Sierra on New England's average gas ($4.25 a gallon) costs about $307 a month for the same driving.
Can I charge a Sierra EV on a regular 120 V outlet in New Haven?
Not at 38 miles a day: a 120 V outlet adds only about 29 miles in 12 hours on an average day (23 in the coldest week). Plan on 240 V, which fills it from 10% in about 10 hours.
Is it greener to drive electric on New Haven's grid?
Yes, more than most places. New Haven's grid (NPCC New England) is 30% cleaner than the US average, so a Sierra EV charged on it makes 75% 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 New Haven
Sources: temperatures, 30-year normals (NOAA 1991–2020) at New Haven Tweed Airport, CT; home electricity, EIA (Connecticut, July 2026); gas, EIA weekly (New England); 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.