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Data as of 2026-09-20
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Built 2026-09-21 (21 September 2026)

HST Daily Electricity Demand by Hour of Day, 22 August to 20 September 2026

In the 30 complete local days from 22 August to 20 September 2026, electricity demand in HST averaged 85 MW and typically peaked at 18:00 local time (103 MW) and bottomed out at 04:00 (64 MW). Hours are local clock time (America/New_York).

Key Facts

  • Over 30 complete local days from 22 August to 20 September 2026, average demand in HST was 85 MW. The hour of the day with the highest average demand was 18:00 local time (103 MW) and the lowest was 04:00 (64 MW).
  • The largest three hour rise in average demand was 3 MW, between 14:00 to 17:00 local time.
  • The single highest hour of demand in the 30 day window was 127 MW, in the hour starting 22 Aug 2026, 16:00 EDT (UTC-04:00).

Average Day by Local Hour

30 days to 2026-09-20, America/New_York time
HST average demand and net generation by local hour Average electricity demand in HST by local clock hour over 30 complete local days from 22 August to 20 September 2026. It was lowest at 04:00 (64 MW) and highest at 18:00 (103 MW). 0 30 60 90 120 00:0003:0006:0009:0012:0015:0018:0021:00
Average electricity demand in HST by local clock hour over 30 complete local days from 22 August to 20 September 2026. It was lowest at 04:00 (64 MW) and highest at 18:00 (103 MW).
Mean MW by local hour, 2026-08-22 to 2026-09-20
HST average demand and net generation by local hour
Local hour (America/New_York)Demand
00:0076 MW
01:0071 MW
02:0067 MW
03:0065 MW
04:0064 MW
05:0064 MW
06:0066 MW
07:0064 MW
08:0068 MW
09:0075 MW
10:0083 MW
11:0090 MW
12:0096 MW
13:0099 MW
14:00100 MW
15:00102 MW
16:00103 MW
17:00103 MW
18:00103 MW
19:00102 MW
20:00101 MW
21:0097 MW
22:0090 MW
23:0083 MW
Average HST demand by local hour
Local hourDemand
00:00 76 MW
01:00 71 MW
02:00 67 MW
03:00 65 MW
04:00 64 MW
05:00 64 MW
06:00 66 MW
07:00 64 MW
08:00 68 MW
09:00 75 MW
10:00 83 MW
11:00 90 MW
12:00 96 MW
13:00 99 MW
14:00 100 MW
15:00 102 MW
16:00 103 MW
17:00 103 MW
18:00 103 MW
19:00 102 MW
20:00 101 MW
21:00 97 MW
22:00 90 MW
23:00 83 MW

Each value is the mean over 30 complete local days from 22 August to 20 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 127 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 2026-09-20. 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 30 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 30 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.