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

PSEI 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 PSEI averaged 2,438 MW and typically peaked at 17:00 local time (2,821 MW) and bottomed out at 03:00 (1,895 MW). Hours are local clock time (America/Los_Angeles).

Key Facts

  • Over 29 complete local days from 22 August to 19 September 2026, average demand in PSEI was 2,438 MW. The hour of the day with the highest average demand was 17:00 local time (2,821 MW) and the lowest was 03:00 (1,895 MW).
  • The largest three hour rise in average demand was 185 MW, between 14:00 to 17:00 local time.
  • The single highest hour of demand in the 30 day window was 3,521 MW, in the hour starting 25 Aug 2026, 17:00 PDT (UTC-07:00).

Average Day by Local Hour

29 days to 2026-09-19, America/Los_Angeles time
PSEI average demand and net generation by local hour Average electricity demand in PSEI by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 03:00 (1,895 MW) and highest at 17:00 (2,821 MW). Net generation is the power produced inside the grid, so it differs from demand by net imports. 0 750 1,500 2,250 3,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average electricity demand in PSEI by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 03:00 (1,895 MW) and highest at 17:00 (2,821 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
PSEI average demand and net generation by local hour
Local hour (America/Los_Angeles)DemandNet generation
00:002,119 MW559 MW
01:001,999 MW542 MW
02:001,924 MW533 MW
03:001,895 MW518 MW
04:001,927 MW513 MW
05:002,038 MW529 MW
06:002,213 MW553 MW
07:002,355 MW564 MW
08:002,457 MW564 MW
09:002,520 MW538 MW
10:002,558 MW527 MW
11:002,583 MW520 MW
12:002,606 MW526 MW
13:002,618 MW530 MW
14:002,636 MW556 MW
15:002,679 MW597 MW
16:002,749 MW643 MW
17:002,821 MW681 MW
18:002,818 MW681 MW
19:002,809 MW699 MW
20:002,802 MW707 MW
21:002,666 MW680 MW
22:002,465 MW652 MW
23:002,266 MW605 MW
PSEI average wind output by local hour Average wind generation in PSEI by local clock hour over 29 complete local days from 22 August to 19 September 2026. 0 50 100 150 200 00:0003:0006:0009:0012:0015:0018:0021:00
Average wind generation in PSEI by local clock hour over 29 complete local days from 22 August to 19 September 2026.
Mean MW by local hour, 2026-08-22 to 2026-09-19
PSEI average wind output by local hour
Local hour (America/Los_Angeles)Wind
00:00149 MW
01:00146 MW
02:00145 MW
03:00135 MW
04:00129 MW
05:00131 MW
06:00131 MW
07:00134 MW
08:00128 MW
09:00108 MW
10:00102 MW
11:0097 MW
12:0095 MW
13:0097 MW
14:0099 MW
15:00109 MW
16:00119 MW
17:00124 MW
18:00118 MW
19:00132 MW
20:00155 MW
21:00165 MW
22:00165 MW
23:00161 MW
Average PSEI demand, net generation, wind by local hour
Local hourDemandNet generationWind
00:00 2,119 MW 559 MW 149 MW
01:00 1,999 MW 542 MW 146 MW
02:00 1,924 MW 533 MW 145 MW
03:00 1,895 MW 518 MW 135 MW
04:00 1,927 MW 513 MW 129 MW
05:00 2,038 MW 529 MW 131 MW
06:00 2,213 MW 553 MW 131 MW
07:00 2,355 MW 564 MW 134 MW
08:00 2,457 MW 564 MW 128 MW
09:00 2,520 MW 538 MW 108 MW
10:00 2,558 MW 527 MW 102 MW
11:00 2,583 MW 520 MW 97 MW
12:00 2,606 MW 526 MW 95 MW
13:00 2,618 MW 530 MW 97 MW
14:00 2,636 MW 556 MW 99 MW
15:00 2,679 MW 597 MW 109 MW
16:00 2,749 MW 643 MW 119 MW
17:00 2,821 MW 681 MW 124 MW
18:00 2,818 MW 681 MW 118 MW
19:00 2,809 MW 699 MW 132 MW
20:00 2,802 MW 707 MW 155 MW
21:00 2,666 MW 680 MW 165 MW
22:00 2,465 MW 652 MW 165 MW
23:00 2,266 MW 605 MW 161 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. Solar is left out of the net load calculation for PSEI: the series is missing, reads zero, or is under 3% of average demand in this window. The single highest hour of demand in the whole 30 day window was 3,521 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/Los_Angeles. 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.