Cost to Run a Portable Air Conditioner in Montana
Montana's average residential electricity rate is 13.9¢/kWh as of April 2026 — the 7th cheapest in the country, 26% below the U.S. average. At typical usage (8 hours/day), a portable air conditioner here costs $33.80 per month.
Per hour
$0.14
at 700–1,500 W
Per day
$1.11
8 hours/day
Per month
$33.80
243 kWh
Per year
$406
2,920 kWh
By usage level in Montana
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.56 | $16.90 | $203 |
| Typical (8 hrs/day) | $1.11 | $33.80 | $406 |
| Heavy (16 hrs/day) | $2.22 | $67.61 | $812 |
Montana vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a portable air conditioner in Montana?
At Montana's current average residential rate of 13.9¢/kWh (April 2026), a portable air conditioner with typical usage costs about $1.11 per day, $33.80 per month, or $406 per year.
Is running a portable air conditioner in Montana more expensive than average?
No — it's cheaper. Montana's rate is about 26% below the U.S. average: $33.80 per month here versus $45.72 nationally.
What does electricity cost in Montana right now?
Montana residents pay an average of 13.9¢ per kWh as of April 2026 — the 7th cheapest rate of the 51 U.S. jurisdictions we track.