How Much to Run a Window AC in Wisconsin? $0.21/Hr, $36/Summer
Running window air conditioner in Wisconsin costs about $0.21 an hour and roughly $36 for the summer — 1,100 W for 1.9 hours a day at 19.06¢/kWh.
· Source: EIA Electric Power Monthly Table 5.6.A (July 2026 data) · next EIA update ~Oct 23
On this page: CalculatorTableHow we calculatedSources
Jump to calculator ↓Slider nudges the Wisconsin rate; the URL keeps it.
- Per hour
- $0.21 at 19.06¢/kWh
- Per summer
- $36 (92 days)
- Hours per day
- 1.9 (NOAA state cooling degree-days-scaled)
- Degree-days used
- 501 (NOAA CPC state, population-weighted)
- Wattage
- 1,100 W (typical 500–1,500)
- Wisconsin rate
- 19.06¢ (July 2026)
- Rank of 20 cold states
- 10 (10th most expensive)
Why this number
Wisconsin runs window air conditioner less than the national baseline in June–August — 1.9 hours a day on the NOAA state degree-day scaling used here, against 3.6 nationally — and pays 19.06¢/kWh for it. Those two numbers, times 1,100 W, are the whole $36.
Window air conditioner cost in Wisconsin by hours per day — per day / per summer
| Hours per day | Wisconsin avg 19.06¢ | Wisconsin Electric Pow 19.2¢ | Wisconsin Power & Ligh 16.9¢ | Wisconsin Public Servi 16.2¢ |
|---|---|---|---|---|
| 1 h | $0.21 / $19 | $0.21 / $19 | $0.19 / $17 | $0.18 / $16 |
| 2 h | $0.42 / $39 | $0.42 / $39 | $0.37 / $34 | $0.36 / $33 |
| 4 h | $0.84 / $77 | $0.84 / $78 | $0.74 / $68 | $0.71 / $66 |
| 6 h | $1.26 / $116 | $1.27 / $117 | $1.12 / $103 | $1.07 / $98 |
| 8 h | $1.68 / $154 | $1.69 / $155 | $1.49 / $137 | $1.43 / $131 |
| 12 h | $2.52 / $231 | $2.53 / $233 | $2.23 / $205 | $2.14 / $197 |
What Wisconsin’s utilities charge for it
| Utility | Residential customers | ¢/kWh (EIA-861 2024) | Per hour | Per summer at 1.9 h/day |
|---|---|---|---|---|
| Wisconsin Electric Power Co | 1,048,148 | 19.2¢ | $0.21 | $37 |
| Wisconsin Power & Light Co | 437,211 | 16.9¢ | $0.19 | $32 |
| Wisconsin Public Service Corp | 411,775 | 16.2¢ | $0.18 | $31 |
What the numbers say about window air conditioner in Wisconsin
Wisconsin logged 501 population-weighted cooling degree-days over June–August (NOAA CPC state series), 52% of the CONUS figure of 958, which is why this page runs window air conditioner 1.9 hours a day against the national 3.6 — 1.7 hours less. At Wisconsin’s July 2026 rate of 19.06¢/kWh that makes it the 10th most expensive of the 20 cold states for window air conditioner: $36 for the 92-day summer, against Montana’s $14 and Alaska’s $68. Wisconsin Electric Power Co, Wisconsin’s largest utility with 1,048,148 residential customers, averages 19.2¢ — $37 for the same hours — while Wisconsin Public Service Corp at 16.2¢ comes to $31, a $6 spread on identical use. Wisconsin’s July 2026 rate of 19.06¢ sets the $0.21 per hour; its winter average of 18.39¢ is 0.67¢ lower, a difference that matters for heating loads but not for window air conditioner use in June–August.
Frequently asked questions
How much does it cost to run window air conditioner per hour in Wisconsin?
$0.21 an hour for a 1,100 W unit at Wisconsin’s July 2026 average of 19.06¢/kWh (1,100 ÷ 1,000 × 0.1906); at Wisconsin Electric Power Co’s 19.2¢ it is $0.21.
How much does window air conditioner cost for the whole summer in Wisconsin?
About $36: 1,100 W × 1.9 hours a day × 92 days (June–August) × 19.06¢. The hours are the national 3.6 h/day scaled by NOAA CPC state population-weighted CDD, June–August 2026 (501 against the CONUS 958); enter your own hours above for your own figure.
Is window air conditioner expensive to run in Wisconsin compared with other cold states?
Wisconsin is the 10th most expensive of the 20 cold states on this site at $36 a summer; the range runs from Montana ($14) to Alaska ($68), driven almost entirely by the electricity rate.
How we calculated this
Worked for window air conditioner in Wisconsin: 1,100 W ÷ 1,000 × 0.1906 $/kWh = $0.21 per hour; hours per day = 3.6 × (501 ÷ 958) = 1.9; 1,100 ÷ 1,000 × 1.9 × 92 × 0.1906 = $36 for the summer. Rate: EIA Electric Power Monthly 5.6.A (July 2026); degree-days: NOAA CPC state population-weighted CDD, June–August 2026, against the CONUS total; utility prices: EIA-861 2024.Sources: U.S. Energy Information Administration (EIA) electricity rates · DSIRE incentive records · public IRS/OBBBA guidance. Figures are modeled estimates, not quotes or tax advice. See our methodology.
Where to go next
- Cost to run window air conditioner (national page) — The 1,100 W and 3.6 h/day baseline this page scales for Wisconsin, with the sourced benchmark.
- Cost to heat a home in Wisconsin — Gas, propane, oil, heat pump and resistance per MMBtu at Wisconsin’s own prices — the whole-house picture.
- Find your electricity rate by ZIP — Wisconsin averages 19.06¢ but its utilities span the table above — send your own rate into this calculator.
- Solar panel cost in Wisconsin — Wisconsin’s 19.06¢ July rate, utilities and rate history on the solar side.
- Cost to run space heater in Wisconsin — Same Wisconsin rates and degree-days applied to a 1,500 W space heater.
- Cost to run heat pump in Wisconsin — Same Wisconsin rates and degree-days applied to a 3,500 W heat pump.
- Cost to run window air conditioner in Colorado — $34 for the summer at 17.0¢ and 2.0 h/day — the nearest cold-state comparison.
- Cost to run window air conditioner in New Hampshire — $34 for the summer at 26.6¢ and 1.3 h/day — the nearest cold-state comparison.