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    Hourly electricity consumption varies throughout the day and across seasons

    average hourly U.S. electricity load during typical week
    Source: U.S. Energy Information Administration, U.S. Hourly Electric Grid Monitor
    Note: Data shown represent the average aggregate U.S. hourly load (Eastern Standard Time) by day of the week for the months indicated between 2015 and 2019.

    The electricity consumed in a given period (often referred to as electricity load) varies throughout the year in somewhat predictable patterns. Total U.S. hourly electricity load is generally highest in the summer months when demand peaks in the afternoon as households and businesses are using air conditioning on hot days. During the winter months, hourly electricity load is less variable but peaks in both the morning and the evening. Load is generally lowest in the spring and autumn when homes and businesses have less need for space heating or cooling.

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    Energy Explained -- U.S. Energy Facts