Michigan Power Outage Season
When outages happen most in Michigan, and what to expect.
June is historically Michigan's busiest month for recorded power outages, part of a summer season (June–August) that accounts for about 34% of all recorded outages statewide, averaging 4.3 hours per event. 42 of Michigan's 83 tracked counties currently carry a Reliability Grade of F.
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Michigan outages by month
Total recorded events and average duration per event, summed across every tracked county in Michigan.
Peak season insight
Michigan's outage season runs June–August, accounting for 34% of all recorded outages. June has the highest frequency.
Month-by-month data table
| Month | Events | Avg duration |
|---|---|---|
| January | 3,436 | 3.4 hrs |
| February | 3,619 | 4.9 hrs |
| March | 5,274 | 6.4 hrs |
| April | 6,029 | 3.8 hrs |
| May | 6,356 | 3.7 hrs |
| June | 9,520 | 3.8 hrs |
| July | 8,594 | 4.1 hrs |
| August | 7,863 | 5.3 hrs |
| September | 5,979 | 3.3 hrs |
| October | 6,764 | 3.1 hrs |
| November | 6,981 | 4.2 hrs |
| December | 5,261 | 6.3 hrs |
This month in Michigan
October has historically recorded 6,764 outage events across Michigan, above the state's typical monthly average. Outages that start in October have averaged 3.1 hours.
Main causes by season
Named storms behind Michigan's worst recorded outages, from the NOAA Storm Events Database.
Winter (December–February)
- Ice Storm
- High Wind
- Winter Storm
- Lake-Effect Snow
- Winter Weather
Spring (March–May)
- Thunderstorm Wind
- Ice Storm
- Winter Storm
- Hail
- Tornado
Summer (June–August)
- Thunderstorm Wind
- Flash Flood
- Tornado
- Tropical Storm Cristobal
- Hail
Fall (September–November)
- High Wind
- Blizzard
- Hail
- Thunderstorm Wind
- Winter Storm
Michigan's worst outage events on record
The five largest outages in Michigan by duration and customers affected.
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Feb 22, 2023 | 367 hrs | 311,048 (40%) | Ice Storm |
| Feb 22, 2023 | 370 hrs | 142,457 (22%) | Ice Storm |
| Aug 12, 2021 | 102 hrs | 159,871 (25%) | Thunderstorm Wind |
| Feb 22, 2023 | 199 hrs | 79,028 (40%) | Ice Storm |
| Feb 22, 2023 | 188 hrs | 81,946 (20%) | Ice Storm |
Highest-risk counties in Michigan
Lowest reliability percentile among Michigan's tracked counties.
| County | Grade | National percentile |
|---|---|---|
| Ogemaw County | F | 1st |
| Oscoda County | F | 2nd |
| Alcona County | F | 2nd |
| Clare County | F | 2nd |
| Arenac County | F | 3rd |
Live weather alerts for Michigan
There are no active National Weather Service alerts for Michigan right now.
These live alerts come from the National Weather Service. They are public-safety information, not an outage prediction.
Michigan power outage FAQ
When do power outages happen most in Michigan?
June is historically the busiest single month for recorded outages in Michigan, and Summer (June–August) accounts for about 34% of all recorded outages across the state.
How long do power outages in Michigan typically last?
Across Michigan's tracked counties, the average recorded outage lasts about 4.3 hours, though individual events -- especially named storms -- can run much longer.
Which counties in Michigan have the highest outage risk?
Ogemaw County, Oscoda County, Alcona County, Clare County, Arenac County currently rank lowest for reliability in Michigan. See each county's page for its full history.
Does this page predict a power outage in Michigan?
No. It describes patterns in recorded county-level outage history, not a guaranteed future event. Check the live National Weather Service alerts below for current conditions.
Prepare for Michigan's outage season
Sized for Michigan's recorded outage frequency and duration. See the full Michigan storm prep checklist.
