Reality Check · Honolulu, HI
2025 GMC Sierra EV in Honolulu, HI
Winter range, charging cost and how far it goes, worked out for Honolulu's weather, grid and prices.
Winter barely touches range in Honolulu: at a typical January's 74°F, a Sierra EV gets an estimated 362 miles on a charge, within 7% of its 390-mile rating. Power is pricey in Hawaii (48.0¢/kWh), so charging at home costs about $316 a month for 38 miles a day, still less than the $362 a gas Sierra costs on the West Coast's gas. Honolulu's grid (HICC Oahu) is 94% dirtier than the US average, but charging on it still makes 31% 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 range
357mi
At Honolulu's typical October day, 80°F · 35% highway
Winter low
362mi
January, 74°F · lows near 67°F
Home chargingEstimated
$316/mo
27.3¢ a mile at 48.0¢/kWh. Gas Sierra: $362/mo
Honolulu's grid
1.49lb CO₂/kWh
HICC Oahu (EPA eGRID): 94% dirtier than the US, 31% less CO₂ than gas
Honolulu, 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 · 74°F
7% below its 390-mile rating · coldest week 362 mi
361mi
Spring Mar–May · 77°F
8% below its rating
358mi
Summer Jun–Aug · 81°F
8% below its rating
358mi
Fall Sep–Nov · 80°FNow
8% below its rating
357mi
A Sierra EV's range through a Honolulu yearEstimated
Each month at Honolulu's 30-year normal temperature, 35% highway. No day of the year averages below freezing.
How far it goes from Honolulu, on real roads
In October, from a full charge with 10% in reserve: about 161 mi out and back, 322 mi one way (January: 326 mi). Dots are DC fast chargers by network.
Fast charging around Honolulu
PlugLog's map of every public charger. Tesla-only Superchargers aren't counted.
- 42DC fast chargers within 25 mi
- 1.5 mito the nearest
- OpConnect19 in reach
- Shell Recharge11
- Electrify America3
- EV Connect2
- Tesla Supercharger2
Questions Honolulu drivers ask
How far can a Sierra EV go in a Honolulu winter?
Honolulu's winters are mild: about 362 miles on a typical January day (74°F) and about the same in the coldest week (around January 15, 74°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 Honolulu?
About $316 a month at home for 38 miles a day, at Hawaii's average home electricity rate of 48.0¢/kWh: about 27.3¢ a mile. A gas Sierra on the West Coast's average gas ($5.01 a gallon) costs about $362 a month for the same driving.
Can I charge a Sierra EV on a regular 120 V outlet in Honolulu?
Not at 38 miles a day: a 120 V outlet adds only about 27 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 Honolulu's grid?
Yes. Honolulu's grid (HICC Oahu) is 94% dirtier than the US average, but a Sierra EV charged on it still makes 31% 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 Honolulu
Sources: temperatures, 30-year normals (NOAA 1991–2020) at Honolulu International Airport, HI; home electricity, EIA (Hawaii, July 2026); gas, EIA weekly (the West Coast); 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.