How Much to Run a Dehumidifier in Connecticut? $79/Summer
Running dehumidifier in Connecticut costs about $0.12 an hour and roughly $79 for the summer — 500 W for 7.2 hours a day at 24.16¢/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 Connecticut rate; the URL keeps it.
- Per hour
- $0.12 at 24.16¢/kWh
- Per summer
- $79 (92 days)
- Hours per day
- 7.2 (NOAA state cooling degree-days-scaled)
- Degree-days used
- 571 (NOAA CPC state, population-weighted)
- Wattage
- 500 W (typical 300–800)
- Connecticut rate
- 24.16¢ (July 2026)
- Rank of 20 cold states
- 5 (5th most expensive)
Why this number
Connecticut runs dehumidifier less than the national baseline in June–August — 7.2 hours a day on the NOAA state degree-day scaling used here, against 12.0 nationally — and pays 24.16¢/kWh for it. Those two numbers, times 500 W, are the whole $79.
Dehumidifier cost in Connecticut by hours per day — per day / per summer
| Hours per day | Connecticut avg 24.16¢ | Connecticut Light & Po 25.3¢ | United Illuminating Co 31.1¢ | Constellation NewEnerg 12.7¢ |
|---|---|---|---|---|
| 1 h | $0.12 / $11 | $0.13 / $12 | $0.16 / $14 | $0.06 / $6 |
| 2 h | $0.24 / $22 | $0.25 / $23 | $0.31 / $29 | $0.13 / $12 |
| 4 h | $0.48 / $44 | $0.51 / $47 | $0.62 / $57 | $0.25 / $23 |
| 6 h | $0.72 / $67 | $0.76 / $70 | $0.93 / $86 | $0.38 / $35 |
| 8 h | $0.97 / $89 | $1.01 / $93 | $1.24 / $114 | $0.51 / $47 |
| 12 h | $1.45 / $133 | $1.52 / $140 | $1.87 / $172 | $0.76 / $70 |
What Connecticut’s utilities charge for it
| Utility | Residential customers | ¢/kWh (EIA-861 2024) | Per hour | Per summer at 7.2 h/day |
|---|---|---|---|---|
| Connecticut Light & Power Co | 1,174,420 | 25.3¢ | $0.13 | $83 |
| United Illuminating Co | 312,291 | 31.1¢ | $0.16 | $102 |
| Constellation NewEnergy, Inc | 125,376 | 12.7¢ | $0.06 | $42 |
What the numbers say about dehumidifier in Connecticut
Connecticut logged 571 population-weighted cooling degree-days over June–August (NOAA CPC state series), 60% of the CONUS figure of 958, which is why this page runs dehumidifier 7.2 hours a day against the national 12.0 — 4.8 hours less. At Connecticut’s July 2026 rate of 24.16¢/kWh that makes it the 5th most expensive of the 20 cold states for dehumidifier: $79 for the 92-day summer, against Montana’s $21 and Alaska’s $103. Connecticut Light & Power Co, Connecticut’s largest utility with 1,174,420 residential customers, averages 25.3¢ — $83 for the same hours — while Constellation NewEnergy, Inc at 12.7¢ comes to $42, a $41 spread on identical use. Connecticut’s July 2026 rate of 24.16¢ sets the $0.12 per hour; its winter average of 28.26¢ is 4.10¢ higher, a difference that matters for heating loads but not for dehumidifier use in June–August.
Frequently asked questions
How much does it cost to run dehumidifier per hour in Connecticut?
$0.12 an hour for a 500 W unit at Connecticut’s July 2026 average of 24.16¢/kWh (500 ÷ 1,000 × 0.2416); at Connecticut Light & Power Co’s 25.3¢ it is $0.13.
How much does dehumidifier cost for the whole summer in Connecticut?
About $79: 500 W × 7.2 hours a day × 92 days (June–August) × 24.16¢. The hours are the national 12.0 h/day scaled by NOAA CPC state population-weighted CDD, June–August 2026 (571 against the CONUS 958); enter your own hours above for your own figure.
Is dehumidifier expensive to run in Connecticut compared with other cold states?
Connecticut is the 5th most expensive of the 20 cold states on this site at $79 a summer; the range runs from Montana ($21) to Alaska ($103), driven almost entirely by the electricity rate.
How we calculated this
Worked for dehumidifier in Connecticut: 500 W ÷ 1,000 × 0.2416 $/kWh = $0.12 per hour; hours per day = 12.0 × (571 ÷ 958) = 7.2; 500 ÷ 1,000 × 7.2 × 92 × 0.2416 = $79 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 dehumidifier (national page) — The 500 W and 12.0 h/day baseline this page scales for Connecticut, with the sourced benchmark.
- Cost to heat a home in Connecticut — Gas, propane, oil, heat pump and resistance per MMBtu at Connecticut’s own prices — the whole-house picture.
- Find your electricity rate by ZIP — Connecticut averages 24.16¢ but its utilities span the table above — send your own rate into this calculator.
- Solar panel cost in Connecticut — Connecticut’s 24.16¢ July rate, utilities and rate history on the solar side.
- Cost to run space heater in Connecticut — Same Connecticut rates and degree-days applied to a 1,500 W space heater.
- Cost to run heat pump in Connecticut — Same Connecticut rates and degree-days applied to a 3,500 W heat pump.
- Cost to run dehumidifier in Massachusetts — $85 for the summer at 30.49¢ and 6.1 h/day — the nearest cold-state comparison.
- Cost to run dehumidifier in Illinois — $86 for the summer at 19.22¢ and 9.7 h/day — the nearest cold-state comparison.