December residential electricity rates will fall on O'ahu, Maui and the Big Island and rise on Kaua'i, the utilities said.

Hawaiian Electric Co. said the typical 600-kilowatt-hour bill for O'ahu residential customers will fall slightly to $145.09 from $145.46 in November.

The effective rate for electricity in Honolulu is declining to 22.67 cents per kilowatt hour from 22.7 cents charged last month.

Elsewhere in the state:

• Maui customers will see their rates decline to 26.20 cents from 26.54 cents in November. The typical Maui bill will be $165.25.

• Big Island residential rates will decline to 31.37 cents from 31.62 cents that was charged per kilowatt hour last month.

The typical bill will be $199.31.

• Kaua'i Island Utility Cooperative's November rate is rising to 34.60 cents from 32.74 cents charged last month.

Hawaiian Electric noted the rate for O'ahu is still below the 32.5 cents per kilowatt hour paid in September 2008, when the effects of record-high oil prices were being felt.