Wyoming Power Outage Season
When outages happen most in Wyoming, and what to expect.
August is historically Wyoming's busiest month for recorded power outages, part of a summer season (June–August) that accounts for about 37% of all recorded outages statewide, averaging 2.5 hours per event.
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Wyoming outages by month
Total recorded events and average duration per event, summed across every tracked county in Wyoming.
Peak season insight
Wyoming's outage season runs June–August, accounting for 37% of all recorded outages. August has the highest frequency.
Month-by-month data table
| Month | Events | Avg duration |
|---|---|---|
| January | 280 | 2.0 hrs |
| February | 270 | 2.3 hrs |
| March | 407 | 2.4 hrs |
| April | 469 | 2.1 hrs |
| May | 461 | 2.1 hrs |
| June | 629 | 2.5 hrs |
| July | 688 | 2.3 hrs |
| August | 833 | 2.4 hrs |
| September | 527 | 3.4 hrs |
| October | 496 | 2.3 hrs |
| November | 350 | 2.4 hrs |
| December | 342 | 2.9 hrs |
This month in Wyoming
October has historically recorded 496 outage events across Wyoming, above the state's typical monthly average. Outages that start in October have averaged 2.3 hours.
Main causes by season
Named storms behind Wyoming's worst recorded outages, from the NOAA Storm Events Database.
Winter (December–February)
- High Wind
- Winter Storm
Spring (March–May)
- High Wind
- Heavy Snow
- Hail
- Winter Storm
- Flood
Summer (June–August)
- Hail
- Wildfire
- Thunderstorm Wind
- Flash Flood
Fall (September–November)
- Winter Weather
- Wildfire
- Winter Storm
- Heat
- Hail
Wyoming's worst outage events on record
The five largest outages in Wyoming by duration and customers affected.
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Mar 15, 2020 | 31 hrs | 19,300 (36%) | High Wind |
| Sep 8, 2020 | 50 hrs | 6,789 (26%) | Heat |
| May 7, 2024 | 48 hrs | 3,981 (61%) | Heavy Snow |
| Nov 13, 2025 | 4 hrs | 43,178 (89%) | Unnamed event |
| Aug 25, 2025 | 15 hrs | 5,551 (51%) | Unnamed event |
Highest-risk counties in Wyoming
Lowest reliability percentile among Wyoming's tracked counties.
| County | Grade | National percentile |
|---|---|---|
| Crook County | C | 41st |
| Converse County | C | 48th |
| Weston County | B | 64th |
| Sublette County | B | 64th |
| Johnson County | B | 69th |
Live weather alerts for Wyoming
There are no active National Weather Service alerts for Wyoming right now.
These live alerts come from the National Weather Service. They are public-safety information, not an outage prediction.
Wyoming power outage FAQ
When do power outages happen most in Wyoming?
August is historically the busiest single month for recorded outages in Wyoming, and Summer (June–August) accounts for about 37% of all recorded outages across the state.
How long do power outages in Wyoming typically last?
Across Wyoming's tracked counties, the average recorded outage lasts about 2.5 hours, though individual events -- especially named storms -- can run much longer.
Which counties in Wyoming have the highest outage risk?
Crook County, Converse County, Weston County, Sublette County, Johnson County currently rank lowest for reliability in Wyoming. See each county's page for its full history.
Does this page predict a power outage in Wyoming?
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 Wyoming's outage season
Sized for Wyoming's recorded outage frequency and duration.
