Cost to Run a Evaporative (Swamp) Cooler in Delaware
Delaware's average residential electricity rate is 19.4¢/kWh as of May 2026 — the 33rd cheapest in the country, 5% above the U.S. average. At typical usage (8 hours/day), a evaporative (swamp) cooler here costs $18.87 per month.
Per hour
7.8¢
at 100–800 W
Per day
$0.62
8 hours/day
Per month
$18.87
97 kWh
Per year
$227
1,168 kWh
By usage level in Delaware
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.31 | $9.44 | $113 |
| Typical (8 hrs/day) | $0.62 | $18.87 | $227 |
| Heavy (16 hrs/day) | $1.24 | $37.74 | $453 |
Delaware 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 Delaware?
At Delaware's current average residential rate of 19.4¢/kWh (May 2026), a evaporative (swamp) cooler with typical usage costs about $0.62 per day, $18.87 per month, or $227 per year.
Is running a evaporative (swamp) cooler in Delaware more expensive than average?
Yes. Delaware's electricity costs about 5% more than the U.S. average, so the same usage costs $18.87 per month here versus $17.90 nationally.
What does electricity cost in Delaware right now?
Delaware residents pay an average of 19.4¢ per kWh as of May 2026 — the 33rd cheapest rate of the 51 U.S. jurisdictions we track.