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

PJM Daily Load Shape and Duck Curve by Hour, 22 August to 19 September 2026

In the 29 complete local days from 22 August to 19 September 2026, electricity demand in PJM averaged 106.3 GW and typically peaked at 17:00 local time (125.4 GW) and bottomed out at 04:00 (88,458 MW). With solar and wind taken off, the remaining load fell to 85,660 MW at 04:00 and then rose 9,101 MW between 14:00 to 17:00. Hours are local clock time (America/New_York).

Key Facts

  • Over 29 complete local days from 22 August to 19 September 2026, average demand in PJM was 106.3 GW. The hour of the day with the highest average demand was 17:00 local time (125.4 GW) and the lowest was 04:00 (88,458 MW).
  • The largest three hour rise in average demand was 6,095 MW, between 14:00 to 17:00 local time.
  • The single highest hour of demand in the 30 day window was 152.5 GW, in the hour starting 1 Sept 2026, 17:00 EDT (UTC-04:00).
  • Solar output averaged 11,686 MW at its 12:00 peak, 11% of average demand.
  • Demand minus solar and wind (net load) averaged 99,759 MW, fell to 85,660 MW at 04:00 and rose 9,101 MW over the three hours from 14:00 to 17:00, 9% of average demand.

Average Day by Local Hour

29 days to 2026-09-19, America/New_York time
PJM average demand and net generation by local hour Average electricity demand in PJM by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 04:00 (88,458 MW) and highest at 17:00 (125.4 GW). Net generation is the power produced inside the grid, so it differs from demand by net imports. 0 37,500 75,000 112,500 150,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average electricity demand in PJM by local clock hour over 29 complete local days from 22 August to 19 September 2026. It was lowest at 04:00 (88,458 MW) and highest at 17:00 (125.4 GW). 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
PJM average demand and net generation by local hour
Local hour (America/New_York)DemandNet generation
00:0096,491 MW101.6 GW
01:0093,117 MW98,998 MW
02:0090,581 MW96,968 MW
03:0088,852 MW95,295 MW
04:0088,458 MW94,756 MW
05:0090,017 MW96,019 MW
06:0092,958 MW98,627 MW
07:0095,619 MW101.3 GW
08:0098,663 MW104.3 GW
09:00101.7 GW107.0 GW
10:00105.0 GW110.3 GW
11:00108.3 GW113.6 GW
12:00112.0 GW117.2 GW
13:00116.0 GW121.2 GW
14:00119.3 GW124.7 GW
15:00122.0 GW127.5 GW
16:00124.3 GW129.5 GW
17:00125.4 GW130.0 GW
18:00123.8 GW128.3 GW
19:00120.7 GW126.1 GW
20:00117.6 GW123.8 GW
21:00112.5 GW118.8 GW
22:00106.0 GW112.2 GW
23:00100.9 GW106.9 GW
PJM duck curve: demand and net load by local hour Average demand and net load (demand minus solar and wind) in PJM by local clock hour over 29 complete local days from 22 August to 19 September 2026. Net load was lowest at 04:00 (85,660 MW) and then rose 9,101 MW between 14:00 to 17:00. 0 37,500 75,000 112,500 150,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average demand and net load (demand minus solar and wind) in PJM by local clock hour over 29 complete local days from 22 August to 19 September 2026. Net load was lowest at 04:00 (85,660 MW) and then rose 9,101 MW between 14:00 to 17:00.
Mean MW by local hour, 2026-08-22 to 2026-09-19
PJM duck curve: demand and net load by local hour
Local hour (America/New_York)DemandNet load (demand minus solar and wind)
00:0096,491 MW93,720 MW
01:0093,117 MW90,337 MW
02:0090,581 MW87,757 MW
03:0088,852 MW85,984 MW
04:0088,458 MW85,660 MW
05:0090,017 MW87,321 MW
06:0092,958 MW90,302 MW
07:0095,619 MW92,212 MW
08:0098,663 MW91,351 MW
09:00101.7 GW90,894 MW
10:00105.0 GW92,816 MW
11:00108.3 GW95,445 MW
12:00112.0 GW98,963 MW
13:00116.0 GW103.1 GW
14:00119.3 GW106.5 GW
15:00122.0 GW109.7 GW
16:00124.3 GW112.8 GW
17:00125.4 GW115.6 GW
18:00123.8 GW117.7 GW
19:00120.7 GW118.1 GW
20:00117.6 GW115.8 GW
21:00112.5 GW110.3 GW
22:00106.0 GW103.5 GW
23:00100.9 GW98,147 MW
PJM average solar and wind output by local hour Average solar and wind generation in PJM by local clock hour over 29 complete local days from 22 August to 19 September 2026. Solar peaked at 12:00 at 11,686 MW. 0 3,000 6,000 9,000 12,000 00:0003:0006:0009:0012:0015:0018:0021:00
Average solar and wind generation in PJM by local clock hour over 29 complete local days from 22 August to 19 September 2026. Solar peaked at 12:00 at 11,686 MW.
Mean MW by local hour, 2026-08-22 to 2026-09-19
PJM average solar and wind output by local hour
Local hour (America/New_York)SolarWind
00:0036 MW2,734 MW
01:0036 MW2,744 MW
02:0034 MW2,791 MW
03:0031 MW2,837 MW
04:0030 MW2,768 MW
05:0029 MW2,667 MW
06:0034 MW2,622 MW
07:00819 MW2,588 MW
08:004,895 MW2,417 MW
09:009,023 MW1,752 MW
10:0010,822 MW1,396 MW
11:0011,524 MW1,298 MW
12:0011,686 MW1,335 MW
13:0011,505 MW1,423 MW
14:0011,271 MW1,494 MW
15:0010,699 MW1,589 MW
16:009,869 MW1,675 MW
17:008,017 MW1,742 MW
18:004,463 MW1,680 MW
19:00940 MW1,596 MW
20:0062 MW1,737 MW
21:0043 MW2,131 MW
22:0040 MW2,468 MW
23:0038 MW2,686 MW
Average PJM demand, net generation, solar, wind and net load by local hour
Local hourDemandNet generationSolarWindNet load
00:00 96,491 MW 101.6 GW 36 MW 2,734 MW 93,720 MW
01:00 93,117 MW 98,998 MW 36 MW 2,744 MW 90,337 MW
02:00 90,581 MW 96,968 MW 34 MW 2,791 MW 87,757 MW
03:00 88,852 MW 95,295 MW 31 MW 2,837 MW 85,984 MW
04:00 88,458 MW 94,756 MW 30 MW 2,768 MW 85,660 MW
05:00 90,017 MW 96,019 MW 29 MW 2,667 MW 87,321 MW
06:00 92,958 MW 98,627 MW 34 MW 2,622 MW 90,302 MW
07:00 95,619 MW 101.3 GW 819 MW 2,588 MW 92,212 MW
08:00 98,663 MW 104.3 GW 4,895 MW 2,417 MW 91,351 MW
09:00 101.7 GW 107.0 GW 9,023 MW 1,752 MW 90,894 MW
10:00 105.0 GW 110.3 GW 10,822 MW 1,396 MW 92,816 MW
11:00 108.3 GW 113.6 GW 11,524 MW 1,298 MW 95,445 MW
12:00 112.0 GW 117.2 GW 11,686 MW 1,335 MW 98,963 MW
13:00 116.0 GW 121.2 GW 11,505 MW 1,423 MW 103.1 GW
14:00 119.3 GW 124.7 GW 11,271 MW 1,494 MW 106.5 GW
15:00 122.0 GW 127.5 GW 10,699 MW 1,589 MW 109.7 GW
16:00 124.3 GW 129.5 GW 9,869 MW 1,675 MW 112.8 GW
17:00 125.4 GW 130.0 GW 8,017 MW 1,742 MW 115.6 GW
18:00 123.8 GW 128.3 GW 4,463 MW 1,680 MW 117.7 GW
19:00 120.7 GW 126.1 GW 940 MW 1,596 MW 118.1 GW
20:00 117.6 GW 123.8 GW 62 MW 1,737 MW 115.8 GW
21:00 112.5 GW 118.8 GW 43 MW 2,131 MW 110.3 GW
22:00 106.0 GW 112.2 GW 40 MW 2,468 MW 103.5 GW
23:00 100.9 GW 106.9 GW 38 MW 2,686 MW 98,147 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. Net load is demand minus solar and wind generation. The single highest hour of demand in the whole 30 day window was 152.5 GW; 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/New_York. 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.