Cost to Run a Window Air Conditioner in California
California's average residential electricity rate is 35.3¢/kWh as of April 2026 — the 50th cheapest in the country, 88% above the U.S. average. At typical usage (8 hours/day), a window air conditioner here costs $77.26 per month.
Per hour
$0.32
at 500–1,500 W
Per day
$2.54
8 hours/day
Per month
$77.26
219 kWh
Per year
$928
2,628 kWh
By usage level in California
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $1.27 | $38.63 | $464 |
| Typical (8 hrs/day) | $2.54 | $77.26 | $928 |
| Heavy (16 hrs/day) | $5.08 | $155 | $1,855 |
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 35.3¢/kWh (April 2026), a window air conditioner with typical usage costs about $2.54 per day, $77.26 per month, or $928 per year.
Is running a window air conditioner in California more expensive than average?
Yes. California's electricity costs about 88% more than the U.S. average, so the same usage costs $77.26 per month here versus $41.15 nationally.
What does electricity cost in California right now?
California residents pay an average of 35.3¢ per kWh as of April 2026 — the 50th cheapest rate of the 51 U.S. jurisdictions we track.