U.S. residential electricity EIA data: July 2026 US average 18.3¢/kWh Updated

Cooling · Pennsylvania

How Much Does It Cost to Run a Central Air Conditioner in Pennsylvania?

The short answer

Running a 3,500W central air conditioner in Pennsylvania costs about $0.76 an hour. At 8 hours a day, that’s roughly $185 a month and $2,220 a year.

Pennsylvania’s average residential rate was 21.7¢ per kWh in July 2026 (EIA), 19% above the US average.

Source: U.S. EIA, July 2026 data · Updated

Central Air Conditioner cost by daily use in Pennsylvania

Cost at 21.7¢/kWh, the Pennsylvania average (EIA, Jul 2026)
Daily usekWh/monthPer dayPer monthPer year
1 hour/day 106.5 $0.76 $23.13 $277
2 hours/day 212.9 $1.52 $46.25 $555
4 hours/day 425.9 $3.04 $92.50 $1,110
8 hours/day 851.8 $6.08 $185 $2,220
12 hours/day 1,277.6 $9.12 $278 $3,330
24 hours/day 2,555.3 $18.24 $555 $6,659

Pennsylvania vs other states

At typical use, a central air conditioner costs $2,220 a year in Pennsylvania — $2,686 less than in Hawaii and $920 more than in Louisiana.

Pennsylvania has the 14th-most-expensive residential electricity of the 50 states and DC. Pennsylvania electricity rates · all states ranked

Electricity price trend in Pennsylvania

21.7¢/kWh in July 2026 — ▲ +11.3% from a year earlier.

How to lower the cost of running a central air conditioner

Central AC is usually the single largest electricity user in a home during summer. Power draw depends on capacity (tons) and efficiency (SEER2 rating): a 3-ton system typically draws 3–4 kW while running. The compressor cycles on and off to hold your thermostat setting, so enter the hours per day it actually runs — on a hot afternoon that can be most of the day, while on a mild day it may be only a few hours.

  • Each degree you raise the thermostat in summer saves roughly 3% on cooling.
  • Replace the air filter every 1–3 months and keep the outdoor condenser clear of debris.
  • Use ceiling fans so you can set the thermostat 3–4°F higher with the same comfort.
  • Summers in Pennsylvania are relatively mild, so cooling costs are concentrated in a few hot weeks each year.

Questions

Frequently asked questions

How much does it cost to run a central air conditioner for 24 hours in Pennsylvania?

Running a 3,500W central air conditioner for 24 hours uses about 84.0 kWh, which costs about $18.24 at Pennsylvania’s average rate of 21.7¢/kWh.

How many kWh does a central air conditioner use per month?

At 8 hours a day, a typical central air conditioner uses about 852 kWh a month. In Pennsylvania that costs $185.

Is it expensive to run a central air conditioner in Pennsylvania?

Pennsylvania has the 14th-most-expensive residential electricity of the 50 states and DC at 21.7¢/kWh — pricier than most. Running a central air conditioner here costs about $2,220 a year at typical use, compared with $1,871 at the national average rate.

What is the electricity rate in Pennsylvania right now?

The average residential electricity rate in Pennsylvania was 21.7¢ per kWh in July 2026, according to the latest EIA data — up 11.3% from a year earlier.

How many watts does a central air conditioner use?

Most residential central AC systems draw 2,000–5,000W while running; a typical 3-ton system uses about 3,500W.

Sources & method