Teton County Power Outage History
2018–2025 · Wyoming
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 27, 2025 | 5 hrs | 1,534 (8%) | Winter Storm |
| Apr 26, 2019 | 0 hrs | 1,177 (6%) | Unnamed event |
| Aug 26, 2025 | 1 hrs | 870 (5%) | Unnamed event |
| May 21, 2024 | 6 hrs | 863 (5%) | Unnamed event |
| Jan 26, 2025 | 9 hrs | 551 (3%) | Unnamed event |
Over the 8 years from 2018 to 2025, Teton County recorded 74 distinct power outage events, averaging 3.1 hours per event.
The single worst outage on record in Teton County started October 27, 2025 (Winter Storm), lasting 5 hours and leaving up to 1,534 customers without power (8% of the county) at its peak.
June has historically been the worst month for outages in Teton County, with 10 events recorded during that month across the dataset.
Based on this history, Teton County earns a Reliability Grade of A, placing it in the 97th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Teton County's outage profile
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Similar counties in Wyoming
Counties with the closest reliability grade and national percentile to Teton County.
| County | Grade | National percentile |
|---|---|---|
| Goshen County | A | 99th |
| Fremont County | A | 94th |
| Niobrara County | A | 93rd |
| Laramie County | A | 93rd |
| Uinta County | A | 93rd |
FAQ
How often does power go out in Teton County?
Between 2018 and 2025, Teton County recorded 74 outage events, averaging 3.1 hours each.
What is Teton County's reliability grade?
Teton County has a Reliability Grade of A, in the 97th national percentile.
What was the worst power outage in Teton County?
The worst outage on record started October 27, 2025 (Winter Storm), lasting 5 hours and affecting up to 1,534 customers.