Montgomery County Power Outage History
2014–2025 · Illinois
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 |
|---|---|---|---|
| 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 |
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).
Sized for Montgomery County's outage profile
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Outage-prep kit
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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 |
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.