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by powerbroker 1564 days ago
The morning and evening dips are generally caused by people operating ovens, microwaves, start-up of some factory equipment, but in this season, no A/C. A/C completely changes the curve as you approach June. Late afternoons become a single peak for the 24 hour periods.

https://www.eia.gov/todayinenergy/detail.php?id=43295