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Data as of 2026-09-19
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Built 2026-09-21 (21 September 2026)

SPA Daily Electricity Demand by Hour of Day, 22 August to 19 September 2026

In the 29 complete local days from 22 August to 19 September 2026, electricity demand in SPA averaged 24 MW and typically peaked at 18:00 local time (29 MW) and bottomed out at 07:00 (18 MW). Hours are local clock time (America/Chicago).

Key Facts

  • Over 29 complete local days from 22 August to 19 September 2026, average demand in SPA was 24 MW. The hour of the day with the highest average demand was 18:00 local time (29 MW) and the lowest was 07:00 (18 MW).
  • The largest three hour rise in average demand was 2 MW, between 14:00 to 17:00 local time.
  • The single highest hour of demand in the 30 day window was 55 MW, in the hour starting 2 Sept 2026, 16:00 CDT (UTC-05:00).

Average Day by Local Hour

29 days to 2026-09-19, America/Chicago time
SPA average demand and net generation by local hour Average electricity demand in SPA by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 07:00 (18 MW) and highest at 18:00 (29 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports. 0 300 600 900 1,200 00:0003:0006:0009:0012:0015:0018:0021:00
Average electricity demand in SPA by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 07:00 (18 MW) and highest at 18:00 (29 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports.
Mean MW by local hour, 2026-08-22 to 2026-09-19
SPA average demand and net generation by local hour
Local hour (America/Chicago)DemandNet generation
00:0023 MW15 MW
01:0022 MW12 MW
02:0022 MW12 MW
03:0023 MW12 MW
04:0022 MW12 MW
05:0021 MW13 MW
06:0022 MW37 MW
07:0018 MW37 MW
08:0020 MW39 MW
09:0020 MW39 MW
10:0024 MW41 MW
11:0024 MW58 MW
12:0026 MW120 MW
13:0025 MW288 MW
14:0026 MW545 MW
15:0028 MW717 MW
16:0027 MW1,060 MW
17:0027 MW1,177 MW
18:0029 MW1,062 MW
19:0026 MW722 MW
20:0023 MW306 MW
21:0027 MW116 MW
22:0023 MW17 MW
23:0023 MW15 MW
Average SPA demand, net generation by local hour
Local hourDemandNet generation
00:00 23 MW 15 MW
01:00 22 MW 12 MW
02:00 22 MW 12 MW
03:00 23 MW 12 MW
04:00 22 MW 12 MW
05:00 21 MW 13 MW
06:00 22 MW 37 MW
07:00 18 MW 37 MW
08:00 20 MW 39 MW
09:00 20 MW 39 MW
10:00 24 MW 41 MW
11:00 24 MW 58 MW
12:00 26 MW 120 MW
13:00 25 MW 288 MW
14:00 26 MW 545 MW
15:00 28 MW 717 MW
16:00 27 MW 1,060 MW
17:00 27 MW 1,177 MW
18:00 29 MW 1,062 MW
19:00 26 MW 722 MW
20:00 23 MW 306 MW
21:00 27 MW 116 MW
22:00 23 MW 17 MW
23:00 23 MW 15 MW

Each value is the mean over 29 complete local days from 22 August to 19 September 2026, weekdays and weekends together, for the hour starting at that local clock time. The single highest hour of demand in the whole 30 day window was 55 MW; it is a published reading, not an average, and is not part of the profile above.

Source: U.S. Energy Information Administration (EIA). (US Government work, public domain) Data as of 2026-09-19. Profiles are computed by World Power Monitor from the operator's hourly series.

Assumptions

  • Hours are local clock time in America/Chicago. A local day is used only if it is whole inside the 30 day window and at least 22 of its hours are complete; the profile uses the 29 most recent such days. Daylight saving follows the local clock: on a clock change day the missing hour is absent and the repeated hour is averaged over both readings.
  • The average mixes weekdays and weekends and covers only 29 days, so it describes recent conditions, not a seasonal norm.
  • The evening ramp is the largest rise over three hours in the average profile, starting between 14:00 and 20:00 local time.