Pennsylvania Power Outage Season
When outages happen most in Pennsylvania, and what to expect.
June is historically Pennsylvania's busiest month for recorded power outages, part of a summer season (June–August) that accounts for about 32% of all recorded outages statewide, averaging 3.2 hours per event. 10 of Pennsylvania's 67 tracked counties currently carry a Reliability Grade of F.
Your support helps keep this site running at zero extra cost to you! As an Amazon Associate, we earn from qualifying purchases.
Pennsylvania outages by month
Total recorded events and average duration per event, summed across every tracked county in Pennsylvania.
Peak season insight
Pennsylvania's outage season runs June–August, accounting for 32% of all recorded outages. June has the highest frequency.
Month-by-month data table
| Month | Events | Avg duration |
|---|---|---|
| January | 5,866 | 2.9 hrs |
| February | 5,663 | 3.6 hrs |
| March | 7,070 | 3.6 hrs |
| April | 7,264 | 3.8 hrs |
| May | 7,438 | 3.4 hrs |
| June | 10,312 | 2.8 hrs |
| July | 10,302 | 3.2 hrs |
| August | 8,790 | 3.1 hrs |
| September | 7,006 | 2.7 hrs |
| October | 6,783 | 2.6 hrs |
| November | 7,275 | 3.4 hrs |
| December | 6,820 | 3.3 hrs |
This month in Pennsylvania
October has historically recorded 6,783 outage events across Pennsylvania, below the state's typical monthly average. Outages that start in October have averaged 2.6 hours.
Main causes by season
Named storms behind Pennsylvania's worst recorded outages, from the NOAA Storm Events Database.
Winter (December–February)
- Heavy Snow
- High Wind
- Winter Storm
- Winter Weather
- Strong Wind
Spring (March–May)
- Thunderstorm Wind
- Tornado
- Strong Wind
- High Wind
- Winter Storm
Summer (June–August)
- Excessive Heat
- Thunderstorm Wind
- Hail
- Tornado
- Tropical Storm Isaias
Fall (September–November)
- High Wind
- Thunderstorm Wind
- Winter Weather
- Drought
- Heavy Snow
Pennsylvania's worst outage events on record
The five largest outages in Pennsylvania by duration and customers affected.
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 29, 2025 | 218 hrs | 270,977 (41%) | Thunderstorm Wind |
| Jun 3, 2020 | 129 hrs | 141,915 (42%) | Thunderstorm Wind |
| Aug 4, 2020 | 131 hrs | 110,546 (41%) | Tropical Storm Isaias |
| Aug 4, 2020 | 114 hrs | 106,525 (43%) | Tropical Storm Isaias |
| Mar 6, 2018 | 115 hrs | 94,231 (38%) | Winter Weather |
Highest-risk counties in Pennsylvania
Lowest reliability percentile among Pennsylvania's tracked counties.
| County | Grade | National percentile |
|---|---|---|
| Sullivan County | F | 2nd |
| Wayne County | F | 5th |
| Forest County | F | 5th |
| Pike County | F | 7th |
| Susquehanna County | F | 7th |
Live weather alerts for Pennsylvania
There are no active National Weather Service alerts for Pennsylvania right now.
These live alerts come from the National Weather Service. They are public-safety information, not an outage prediction.
Pennsylvania power outage FAQ
When do power outages happen most in Pennsylvania?
June is historically the busiest single month for recorded outages in Pennsylvania, and Summer (June–August) accounts for about 32% of all recorded outages across the state.
How long do power outages in Pennsylvania typically last?
Across Pennsylvania's tracked counties, the average recorded outage lasts about 3.2 hours, though individual events -- especially named storms -- can run much longer.
Which counties in Pennsylvania have the highest outage risk?
Sullivan County, Wayne County, Forest County, Pike County, Susquehanna County currently rank lowest for reliability in Pennsylvania. See each county's page for its full history.
Does this page predict a power outage in Pennsylvania?
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 Pennsylvania's outage season
Sized for Pennsylvania's recorded outage frequency and duration.
