Iron County Power Outage History
2014–2025 · Michigan
Worse than average — more frequent or longer outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Dec 16, 2021 | 83 hrs | 4,599 (49%) | Winter Storm |
| Feb 7, 2019 | 1 hrs | 4,257 (45%) | Cold/Wind Chill |
| Jun 15, 2022 | 66 hrs | 3,571 (38%) | Thunderstorm Wind |
| May 9, 2022 | 32 hrs | 2,920 (31%) | High Wind |
| Dec 29, 2025 | 45 hrs | 2,508 (27%) | Winter Weather |
Over the 12 years from 2014 to 2025, Iron County recorded 380 distinct power outage events, averaging 4.3 hours per event.
The single worst outage on record in Iron County started December 16, 2021 (Winter Storm), lasting 83 hours and leaving up to 4,599 customers without power (49% of the county) at its peak.
November has historically been the worst month for outages in Iron County, with 50 events recorded during that month across the dataset.
Based on this history, Iron County earns a Reliability Grade of D, placing it in the 33rd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Iron County's outage profile
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Similar counties in Michigan
Counties with the closest reliability grade and national percentile to Iron County.
| County | Grade | National percentile |
|---|---|---|
| Alpena County | D | 34th |
| Oceana County | D | 32nd |
| Huron County | D | 35th |
| Kent County | D | 35th |
| Muskegon County | D | 31st |
FAQ
How often does power go out in Iron County?
Between 2014 and 2025, Iron County recorded 380 outage events, averaging 4.3 hours each.
What is Iron County's reliability grade?
Iron County has a Reliability Grade of D, in the 33rd national percentile.
What was the worst power outage in Iron County?
The worst outage on record started December 16, 2021 (Winter Storm), lasting 83 hours and affecting up to 4,599 customers.