Hill CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 5, 2021 | 6 hrs | 7,180 (75%) | Unnamed event |
| Dec 17, 2025 | 12 hrs | 7,012 (73%) | Heavy Snow |
| Aug 8, 2024 | 2 hrs | 6,203 (64%) | Unnamed event |
| Dec 23, 2025 | 3 hrs | 6,060 (63%) | High Wind |
| Apr 4, 2020 | 8 hrs | 4,618 (48%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Hill County, Montana that day.
Over the 6 years from 2020 to 2025, Hill County recorded 140 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Hill County started November 5, 2021, lasting 6 hours and leaving up to 7,180 customers without power (75% of the county) at its peak.
August has historically been the worst month for outages in Hill County, with 21 events recorded during that month across the dataset.
Based on this history, Hill County earns a Reliability Grade of B, placing it in the 72nd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Montana
Counties with the closest reliability grade and national percentile to Hill County.
| County | Grade | National percentile |
|---|---|---|
| Ravalli County | B | 72nd |
| Prairie County | B | 71st |
| Lewis and Clark County | B | 73rd |
| Cascade County | B | 69th |
| Wibaux County | B | 69th |
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 Hill County?
Between 2020 and 2025, Hill County recorded 140 outage events, averaging 2.6 hours each.
What is Hill County's reliability grade?
Hill County has a Reliability Grade of B, in the 72nd national percentile.
What was the worst power outage in Hill County?
The worst outage on record started November 5, 2021, lasting 6 hours and affecting up to 7,180 customers.