Cost to Run a Evaporative (Swamp) Cooler in Maine
Maine's average residential electricity rate is 28.4¢/kWh as of April 2026 — the 46th cheapest in the country, 51% above the U.S. average. At typical usage (8 hours/day), a evaporative (swamp) cooler here costs $27.63 per month.
Per hour
$0.11
at 100–800 W
Per day
$0.91
8 hours/day
Per month
$27.63
97 kWh
Per year
$332
1,168 kWh
By usage level in Maine
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.45 | $13.81 | $166 |
| Typical (8 hrs/day) | $0.91 | $27.63 | $332 |
| Heavy (16 hrs/day) | $1.82 | $55.26 | $663 |
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 28.4¢/kWh (April 2026), a evaporative (swamp) cooler with typical usage costs about $0.91 per day, $27.63 per month, or $332 per year.
Is running a evaporative (swamp) cooler in Maine more expensive than average?
Yes. Maine's electricity costs about 51% more than the U.S. average, so the same usage costs $27.63 per month here versus $18.29 nationally.
What does electricity cost in Maine right now?
Maine residents pay an average of 28.4¢ per kWh as of April 2026 — the 46th cheapest rate of the 51 U.S. jurisdictions we track.