Cheyenne CountyPower Outage History
2017–2025 · Colorado
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Sep 29, 2020 | 2 hrs | 1,391 (98%) | Drought |
| Dec 29, 2019 | 9 hrs | 1,387 (98%) | High Wind |
| Mar 1, 2022 | <1 hr | 1,381 (98%) | Drought |
| Aug 23, 2024 | 2 hrs | 1,376 (97%) | Thunderstorm Wind |
| Jun 27, 2025 | 2 hrs | 1,375 (97%) | High Wind |
Over the 9 years from 2017 to 2025, Cheyenne County recorded 325 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Cheyenne County started September 29, 2020 (Drought), lasting 2 hours and leaving up to 1,391 customers without power (98% of the county) at its peak.
July has historically been the worst month for outages in Cheyenne County, with 47 events recorded during that month across the dataset.
Based on this history, Cheyenne County earns a Reliability Grade of D, placing it in the 20th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Cheyenne County's outage profile
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Read our mission →Similar counties in Colorado
Counties with the closest reliability grade and national percentile to Cheyenne County.
| County | Grade | National percentile |
|---|---|---|
| Jackson County | D | 22nd |
| Park County | D | 23rd |
| Summit County | D | 24th |
| Clear Creek County | F | 16th |
| Conejos County | D | 29th |
Most reliable counties in Colorado
The top 3 counties in Colorado by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Rio Blanco County | A | 99th |
| Baca County | A | 98th |
| Washington County | A | 98th |
Least reliable counties in Colorado
The bottom 3 counties in Colorado by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Clear Creek County | F | 16th |
| Cheyenne County | D | 20th |
| Jackson County | D | 22nd |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Cheyenne County?
Between 2017 and 2025, Cheyenne County recorded 325 outage events, averaging 3.0 hours each.
What is Cheyenne County's reliability grade?
Cheyenne County has a Reliability Grade of D, in the 20th national percentile.
What was the worst power outage in Cheyenne County?
The worst outage on record started September 29, 2020 (Drought), lasting 2 hours and affecting up to 1,391 customers.