Cost to Run a Window Air Conditioner in California
California's average residential electricity rate is 33.3¢/kWh as of May 2026 — the 50th cheapest in the country, 81% above the U.S. average. At typical usage (8 hours/day), a window air conditioner here costs $72.89 per month.
Per hour
$0.30
at 500–1,500 W
Per day
$2.40
8 hours/day
Per month
$72.89
219 kWh
Per year
$875
2,628 kWh
By usage level in California
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $1.20 | $36.44 | $438 |
| Typical (8 hrs/day) | $2.40 | $72.89 | $875 |
| Heavy (16 hrs/day) | $4.80 | $146 | $1,750 |
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 33.3¢/kWh (May 2026), a window air conditioner with typical usage costs about $2.40 per day, $72.89 per month, or $875 per year.
Is running a window air conditioner in California more expensive than average?
Yes. California's electricity costs about 81% more than the U.S. average, so the same usage costs $72.89 per month here versus $40.27 nationally.
What does electricity cost in California right now?
California residents pay an average of 33.3¢ per kWh as of May 2026 — the 50th cheapest rate of the 51 U.S. jurisdictions we track.