Humboldt CountyPower Outage History
2015–2025 · Iowa
Better than average — fewer or shorter outages than most counties.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Mar 24, 2016 | 16 hrs | 5,243 (84%) | Winter Storm |
| Feb 24, 2017 | 8 hrs | 3,544 (57%) | Blizzard |
| Jun 25, 2025 | <1 hr | 2,872 (46%) | Tornado |
| Dec 16, 2021 | 23 hrs | 2,848 (46%) | Tornado |
| Apr 18, 2020 | <1 hr | 2,281 (37%) | Unnamed event |
Over the 11 years from 2015 to 2025, Humboldt County recorded 361 distinct power outage events, averaging 1.9 hours per event.
The single worst outage on record in Humboldt County started March 24, 2016 (Winter Storm), lasting 16 hours and leaving up to 5,243 customers without power (84% of the county) at its peak.
June has historically been the worst month for outages in Humboldt County, with 48 events recorded during that month across the dataset.
Based on this history, Humboldt County earns a Reliability Grade of B, placing it in the 75th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Humboldt County's outage profile
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Outage-prep kit
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Humboldt County.
| County | Grade | National percentile |
|---|---|---|
| Floyd County | B | 75th |
| Montgomery County | B | 74th |
| Taylor County | B | 74th |
| Monona County | B | 74th |
| Dallas County | B | 76th |
Most reliable counties in Iowa
The top 3 counties in Iowa by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Clay County | A | 97th |
| Emmet County | A | 95th |
| Bremer County | A | 94th |
Least reliable counties in Iowa
The bottom 3 counties in Iowa by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Marshall County | F | 6th |
| Tama County | F | 12th |
| Jasper County | F | 14th |
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 Humboldt County?
Between 2015 and 2025, Humboldt County recorded 361 outage events, averaging 1.9 hours each.
What is Humboldt County's reliability grade?
Humboldt County has a Reliability Grade of B, in the 75th national percentile.
What was the worst power outage in Humboldt County?
The worst outage on record started March 24, 2016 (Winter Storm), lasting 16 hours and affecting up to 5,243 customers.