Fremont CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 13, 2017 | 4 hrs | 6,819 (25%) | Unnamed event |
| Jul 11, 2025 | 2 hrs | 5,383 (20%) | Thunderstorm Wind |
| Aug 15, 2023 | 2 hrs | 5,370 (20%) | Unnamed event |
| Jul 2, 2021 | 4 hrs | 5,307 (20%) | Unnamed event |
| Aug 20, 2020 | <1 hr | 5,264 (20%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Fremont County, Wyoming that day.
Over the 9 years from 2017 to 2025, Fremont County recorded 145 distinct power outage events, averaging 1.9 hours per event.
The single worst outage on record in Fremont County started August 13, 2017, lasting 4 hours and leaving up to 6,819 customers without power (25% of the county) at its peak.
August has historically been the worst month for outages in Fremont County, with 23 events recorded during that month across the dataset.
Based on this history, Fremont County earns a Reliability Grade of A, placing it in the 94th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Wyoming
Counties with the closest reliability grade and national percentile to Fremont County.
| County | Grade | National percentile |
|---|---|---|
| Niobrara County | A | 93rd |
| Laramie County | A | 93rd |
| Uinta County | A | 93rd |
| Teton County | A | 97th |
| Washakie County | A | 90th |
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 Fremont County?
Between 2017 and 2025, Fremont County recorded 145 outage events, averaging 1.9 hours each.
What is Fremont County's reliability grade?
Fremont County has a Reliability Grade of A, in the 94th national percentile.
What was the worst power outage in Fremont County?
The worst outage on record started August 13, 2017, lasting 4 hours and affecting up to 6,819 customers.