Montana-Dakota Utilities peak
& off-peak hours in South Dakota

Below is every active TOU rate plan Montana-Dakota Utilities offers in South Dakota — 3 plans — with period boundaries verified against the published tariff. No price values; periods only.

Montana-Dakota Utilities also serves Montana · North Dakota · Wyoming — or view all states.

Rate Plans

SD-RATE-16 Optional Time-of-Day Residential Electric Service

Residential
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 12 PM – 8 PM
Effective
Sep 1, 2024
Verified

SD-RATE-26 Optional Time-of-Day Small General Electric Service

Commercial
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 12 PM – 8 PM
Effective
Sep 1, 2024
Verified

SD-RATE-33 Optional Time-of-Day Large General Electric Service

Commercial
PeriodSeasonDaysHours
On-Peak All year Mon–Fri 12 PM – 8 PM
Effective
Sep 1, 2024
Verified
Free · no credit card

Use these Montana-Dakota Utilities hours in your app.

Current period and next transition for any ZIP or address.

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FAQ's

  1. What are Montana-Dakota Utilities's on-peak hours in South Dakota?

    On the SD-RATE-16 plan (Optional Time-of-Day Residential Electric Service), on-peak hours run from 12 PM – 8 PM on weekdays. All remaining hours are classified as off-peak.

  2. Does Montana-Dakota Utilities charge more for electricity at certain times in South Dakota?

    Yes. Montana-Dakota Utilities offers time-of-use (TOU) rate plans where electricity costs vary depending on the period. The period—peak, off-peak, mid-peak, or super off-peak—depends on the time, day, and season. This page lists boundaries for 3 active schedules; tou.tools does not publish pricing ($/kWh) details.

  3. How do I get Montana-Dakota Utilities time-of-use periods in my app?

    Schedules are accessible programmatically via the tou.tools REST API and MCP server for AI agents. By querying a U.S. address or ZIP code, your application can instantly retrieve the current period and next scheduled transition time. Developer API keys are free.

  4. Do Montana-Dakota Utilities time-of-use hours change during holidays or seasons?

    Yes. Peak hours and rate periods can vary by season (typically summer and winter halves) and special holidays. While some schedules like E-ELEC keep stable hours year-round, others introduce super off-peak windows or adjust peak times. Check each rate plan card above for specific seasonal boundaries.