Cost to Run a Window Air Conditioner in Idaho
Idaho's average residential electricity rate is 12.4¢/kWh as of May 2026 — the 1st cheapest in the country, 33% below the U.S. average. At typical usage (8 hours/day), a window air conditioner here costs $27.14 per month.
Per hour
$0.11
at 500–1,500 W
Per day
$0.89
8 hours/day
Per month
$27.14
219 kWh
Per year
$326
2,628 kWh
By usage level in Idaho
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.45 | $13.57 | $163 |
| Typical (8 hrs/day) | $0.89 | $27.14 | $326 |
| Heavy (16 hrs/day) | $1.79 | $54.28 | $652 |
Idaho 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 Idaho?
At Idaho's current average residential rate of 12.4¢/kWh (May 2026), a window air conditioner with typical usage costs about $0.89 per day, $27.14 per month, or $326 per year.
Is running a window air conditioner in Idaho more expensive than average?
No — it's cheaper. Idaho's rate is about 33% below the U.S. average: $27.14 per month here versus $40.27 nationally.
What does electricity cost in Idaho right now?
Idaho residents pay an average of 12.4¢ per kWh as of May 2026 — the 1st cheapest rate of the 51 U.S. jurisdictions we track.