How much does a string of Christmas lights cost per month in Wyoming?

About 8.1¢ a month, assuming 25 W, 6 hours a day, 45 days a year at 14.43¢/kWh.

How many kilowatt-hours does a string of Christmas lights use?

Roughly 7 kWh a year under these assumptions, or 0.03 kWh for every hour it runs.

Is that expensive compared with other states?

Wyoming has the 11th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $1.23 a year.

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Cost to run a string of Christmas lights in Wyoming (August 2026 rates)

At 14.43¢ per kilowatt-hour — Wyoming's average residential price in August 2026 — running a string of Christmas lights costs 97.4¢ a year. That is 21% less than the national average of $1.23. Wyoming's residential rate is up 0.7% from August 2025, which moves this appliance from 96.7¢ to 97.4¢ a year.

Per hour: 0.4¢
Per day of use: 2.2¢
Per month: 8.1¢
Per year: 97.4¢

Assumption: 25 W, 6 hours a day, 45 days a year — 7 kWh a year. Per 100-count LED string. A 100-count incandescent string draws roughly 40 W, and older C9 bulbs far more. Use the calculator to swap in the numbers from your own model.

How Wyoming compares

Wyoming pays 14.43¢/kWh, the 11th cheapest residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to 25.2¢ less a year than the typical U.S. household pays for the same use. Running the same string of Christmas lights costs 85.9¢ a year in Nevada and $3.18 in Hawaii, so where you live changes this bill by $2.33 a year.

State	Rate	Per month	Per year
Arkansas	14.37¢	8.1¢	97.0¢
Mississippi	14.43¢	8.1¢	97.4¢
Wyoming	14.43¢	8.1¢	97.4¢
Washington	14.63¢	8.2¢	98.8¢
Oklahoma	14.82¢	8.3¢	$1.00

States ranked by average residential price, cheapest first. See all 51 states for a string of Christmas lights.

What else costs about the same in Wyoming

Led bulb$2.37 a year in WY Clothes iron$2.38 a year in WY Smart speaker$3.79 a year in WY

Cutting the number down

A timer that runs the display six hours instead of twelve halves the season's cost with nobody noticing.
Incandescent strings are where holiday bills come from; LED strings of the same length are a fraction of the draw.

Questions

How much does a string of Christmas lights cost per month in Wyoming?: About 8.1¢ a month, assuming 25 W, 6 hours a day, 45 days a year at 14.43¢/kWh.
How many kilowatt-hours does a string of Christmas lights use?: Roughly 7 kWh a year under these assumptions, or 0.03 kWh for every hour it runs.
Is that expensive compared with other states?: Wyoming has the 11th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $1.23 a year.