Cost to Run a Evaporative (Swamp) Cooler in Delaware
Delaware's average residential electricity rate is 18.5¢/kWh as of July 2026 — the 33rd cheapest in the country, 1% above the U.S. average. At typical usage (8 hours/day), a evaporative (swamp) cooler here costs $18.00 per month.
Per hour
7.4¢
at 100–800 W
Per day
$0.59
8 hours/day
Per month
$18.00
97 kWh
Per year
$216
1,168 kWh
By usage level in Delaware
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.30 | $9.00 | $108 |
| Typical (8 hrs/day) | $0.59 | $18.00 | $216 |
| Heavy (16 hrs/day) | $1.18 | $35.99 | $432 |
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 18.5¢/kWh (July 2026), a evaporative (swamp) cooler with typical usage costs about $0.59 per day, $18.00 per month, or $216 per year.
Is running a evaporative (swamp) cooler in Delaware more expensive than average?
It's almost exactly the U.S. average: $18.00 per month here versus $17.80 nationally.
What does electricity cost in Delaware right now?
Delaware residents pay an average of 18.5¢ per kWh as of July 2026 — the 33rd cheapest rate of the 51 U.S. jurisdictions we track.