Montgomery 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 |
|---|---|---|---|
| Jan 23, 2020 | 2 hrs | 5,667 (26%) | Unnamed event |
| Apr 27, 2021 | 2 hrs | 5,299 (25%) | Unnamed event |
| Jun 29, 2023 | 27 hrs | 3,844 (18%) | Thunderstorm Wind |
| Feb 2, 2022 | 14 hrs | 3,207 (15%) | Heavy Snow |
| Apr 1, 2023 | 4 hrs | 3,071 (14%) | Tornado |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Montgomery County, Illinois that day.
Over the 12 years from 2014 to 2025, Montgomery County recorded 402 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in Montgomery County started January 23, 2020, lasting 2 hours and leaving up to 5,667 customers without power (26% of the county) at its peak.
July has historically been the worst month for outages in Montgomery County, with 69 events recorded during that month across the dataset.
Based on this history, Montgomery County earns a Reliability Grade of A, placing it in the 80th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Montgomery County.
| County | Grade | National percentile |
|---|---|---|
| DuPage County | A | 80th |
| McLean County | A | 81st |
| Kane County | B | 79th |
| Cook County | B | 79th |
| Greene County | A | 81st |
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 Montgomery County?
Between 2014 and 2025, Montgomery County recorded 402 outage events, averaging 2.9 hours each.
What is Montgomery County's reliability grade?
Montgomery County has a Reliability Grade of A, in the 80th national percentile.
What was the worst power outage in Montgomery County?
The worst outage on record started January 23, 2020, lasting 2 hours and affecting up to 5,667 customers.