Cost to Run a Window Air Conditioner in California
California's average residential electricity rate is 33.6¢/kWh as of July 2026 — the 50th cheapest in the country, 84% above the U.S. average. At typical usage (8 hours/day), a window air conditioner here costs $73.54 per month.
Per hour
$0.30
at 500–1,500 W
Per day
$2.42
8 hours/day
Per month
$73.54
219 kWh
Per year
$883
2,628 kWh
By usage level in California
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $1.21 | $36.77 | $442 |
| Typical (8 hrs/day) | $2.42 | $73.54 | $883 |
| Heavy (16 hrs/day) | $4.84 | $147 | $1,766 |
California 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 California?
At California's current average residential rate of 33.6¢/kWh (July 2026), a window air conditioner with typical usage costs about $2.42 per day, $73.54 per month, or $883 per year.
Is running a window air conditioner in California more expensive than average?
Yes. California's electricity costs about 84% more than the U.S. average, so the same usage costs $73.54 per month here versus $40.06 nationally.
What does electricity cost in California right now?
California residents pay an average of 33.6¢ per kWh as of July 2026 — the 50th cheapest rate of the 51 U.S. jurisdictions we track.