Summit County Power Outage History
2014–2025 · Colorado
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 |
|---|---|---|---|
| Oct 2, 2017 | 22 hrs | 13,497 (83%) | Winter Storm |
| Sep 19, 2015 | 1 hrs | 10,902 (67%) | Unnamed event |
| Nov 26, 2024 | 2 hrs | 8,238 (51%) | Strong Wind |
| Dec 1, 2022 | 2 hrs | 7,502 (46%) | High Wind |
| Jan 21, 2025 | 2 hrs | 6,654 (41%) | Winter Weather |
Over the 12 years from 2014 to 2025, Summit County recorded 806 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in Summit County started October 2, 2017 (Winter Storm), lasting 22 hours and leaving up to 13,497 customers without power (83% of the county) at its peak.
July has historically been the worst month for outages in Summit County, with 114 events recorded during that month across the dataset.
Based on this history, Summit County earns a Reliability Grade of D, placing it in the 24th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Colorado
Counties with the closest reliability grade and national percentile to Summit County.
| County | Grade | National percentile |
|---|---|---|
| Park County | D | 23rd |
| Jackson County | D | 22nd |
| Cheyenne County | D | 20th |
| Conejos County | D | 29th |
| Kit Carson County | D | 31st |
FAQ
How often does power go out in Summit County?
Between 2014 and 2025, Summit County recorded 806 outage events, averaging 2.9 hours each.
What is Summit County's reliability grade?
Summit County has a Reliability Grade of D, in the 24th national percentile.
What was the worst power outage in Summit County?
The worst outage on record started October 2, 2017 (Winter Storm), lasting 22 hours and affecting up to 13,497 customers.