Cost to Run a Evaporative (Swamp) Cooler 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 evaporative (swamp) cooler here costs $27.82 per month.
Per hour
$0.11
at 100–800 W
Per day
$0.92
8 hours/day
Per month
$27.82
97 kWh
Per year
$334
1,168 kWh
By usage level in Maine
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.46 | $13.91 | $167 |
| Typical (8 hrs/day) | $0.92 | $27.82 | $334 |
| Heavy (16 hrs/day) | $1.83 | $55.64 | $668 |
Maine vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a evaporative (swamp) cooler in Maine?
At Maine's current average residential rate of 28.6¢/kWh (May 2026), a evaporative (swamp) cooler with typical usage costs about $0.92 per day, $27.82 per month, or $334 per year.
Is running a evaporative (swamp) cooler in Maine more expensive than average?
Yes. Maine's electricity costs about 55% more than the U.S. average, so the same usage costs $27.82 per month here versus $17.90 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.