Idaho Power Outage Season
When outages happen most in Idaho, and what to expect.
August is historically Idaho's busiest month for recorded power outages, part of a summer season (June–August) that accounts for about 29% of all recorded outages statewide, averaging 2.7 hours per event. 6 of Idaho's 44 tracked counties currently carry a Reliability Grade of F.
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Idaho outages by month
Total recorded events and average duration per event, summed across every tracked county in Idaho.
Peak season insight
Idaho's outage season runs June–August, accounting for 29% of all recorded outages. August has the highest frequency.
Month-by-month data table
| Month | Events | Avg duration |
|---|---|---|
| January | 1,539 | 2.7 hrs |
| February | 1,236 | 2.6 hrs |
| March | 1,449 | 2.5 hrs |
| April | 1,620 | 2.3 hrs |
| May | 1,887 | 2.8 hrs |
| June | 1,787 | 2.6 hrs |
| July | 2,134 | 2.3 hrs |
| August | 2,332 | 2.6 hrs |
| September | 1,929 | 3.0 hrs |
| October | 1,805 | 2.8 hrs |
| November | 1,560 | 2.7 hrs |
| December | 1,932 | 3.3 hrs |
This month in Idaho
October has historically recorded 1,805 outage events across Idaho, above the state's typical monthly average. Outages that start in October have averaged 2.8 hours.
Main causes by season
Named storms behind Idaho's worst recorded outages, from the NOAA Storm Events Database.
Winter (December–February)
- Winter Storm
- Heavy Snow
- Strong Wind
- Thunderstorm Wind
- Blizzard
Spring (March–May)
- High Wind
- Strong Wind
- Thunderstorm Wind
- Winter Weather
- Heavy Snow
Summer (June–August)
- Lightning
- Excessive Heat
- Thunderstorm Wind
- Wildfire
- Hail
Fall (September–November)
- High Wind
- Winter Weather
- Heat
- Heavy Snow
- Thunderstorm Wind
Idaho's worst outage events on record
The five largest outages in Idaho by duration and customers affected.
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jan 13, 2021 | 133 hrs | 24,557 (24%) | High Wind |
| Dec 17, 2025 | 153 hrs | 12,381 (68%) | High Wind |
| Nov 15, 2021 | 68 hrs | 25,571 (85%) | High Wind |
| Jan 13, 2021 | 61 hrs | 18,423 (61%) | Strong Wind |
| Sep 26, 2024 | 58 hrs | 18,917 (63%) | Thunderstorm Wind |
Highest-risk counties in Idaho
Lowest reliability percentile among Idaho's tracked counties.
| County | Grade | National percentile |
|---|---|---|
| Clearwater County | F | 3rd |
| Bonner County | F | 10th |
| Boise County | F | 14th |
| Benewah County | F | 17th |
| Boundary County | F | 17th |
Live weather alerts for Idaho
There are no active National Weather Service alerts for Idaho right now.
These live alerts come from the National Weather Service. They are public-safety information, not an outage prediction.
Idaho power outage FAQ
When do power outages happen most in Idaho?
August is historically the busiest single month for recorded outages in Idaho, and Summer (June–August) accounts for about 29% of all recorded outages across the state.
How long do power outages in Idaho typically last?
Across Idaho's tracked counties, the average recorded outage lasts about 2.7 hours, though individual events -- especially named storms -- can run much longer.
Which counties in Idaho have the highest outage risk?
Clearwater County, Bonner County, Boise County, Benewah County, Boundary County currently rank lowest for reliability in Idaho. See each county's page for its full history.
Does this page predict a power outage in Idaho?
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 Idaho's outage season
Sized for Idaho's recorded outage frequency and duration.
