Cost to Run a Window Air Conditioner in Missouri
Missouri's average residential electricity rate is 16.1¢/kWh as of July 2026 — the 25th cheapest in the country, 12% below the U.S. average. At typical usage (8 hours/day), a window air conditioner here costs $35.24 per month.
Per hour
$0.14
at 500–1,500 W
Per day
$1.16
8 hours/day
Per month
$35.24
219 kWh
Per year
$423
2,628 kWh
By usage level in Missouri
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.58 | $17.62 | $212 |
| Typical (8 hrs/day) | $1.16 | $35.24 | $423 |
| Heavy (16 hrs/day) | $2.32 | $70.48 | $846 |
Missouri 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 Missouri?
At Missouri's current average residential rate of 16.1¢/kWh (July 2026), a window air conditioner with typical usage costs about $1.16 per day, $35.24 per month, or $423 per year.
Is running a window air conditioner in Missouri more expensive than average?
No — it's cheaper. Missouri's rate is about 12% below the U.S. average: $35.24 per month here versus $40.06 nationally.
What does electricity cost in Missouri right now?
Missouri residents pay an average of 16.1¢ per kWh as of July 2026 — the 25th cheapest rate of the 51 U.S. jurisdictions we track.