Cost to Run a Window Air Conditioner in Maine
Maine's average residential electricity rate is 28.6¢/kWh as of May 2026 — the 46th cheapest in the country, 55% above the U.S. average. At typical usage (8 hours/day), a window air conditioner here costs $62.60 per month.
Per hour
$0.26
at 500–1,500 W
Per day
$2.06
8 hours/day
Per month
$62.60
219 kWh
Per year
$752
2,628 kWh
By usage level in Maine
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $1.03 | $31.30 | $376 |
| Typical (8 hrs/day) | $2.06 | $62.60 | $752 |
| Heavy (16 hrs/day) | $4.12 | $125 | $1,503 |
Maine vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a window air conditioner in Maine?
At Maine's current average residential rate of 28.6¢/kWh (May 2026), a window air conditioner with typical usage costs about $2.06 per day, $62.60 per month, or $752 per year.
Is running a window air conditioner in Maine more expensive than average?
Yes. Maine's electricity costs about 55% more than the U.S. average, so the same usage costs $62.60 per month here versus $40.27 nationally.
What does electricity cost in Maine right now?
Maine residents pay an average of 28.6¢ per kWh as of May 2026 — the 46th cheapest rate of the 51 U.S. jurisdictions we track.