Rockingham County Power Outage History
2014–2025 · New Hampshire
Worse than average — more frequent or longer outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 30, 2017 | 116 hrs | 80,811 (47%) | Tropical Storm Philippe |
| Apr 4, 2024 | 98 hrs | 64,404 (38%) | Winter Storm |
| Mar 14, 2017 | 29 hrs | 54,648 (32%) | Heavy Snow |
| Jul 23, 2016 | 19 hrs | 38,471 (23%) | Thunderstorm Wind |
| Nov 26, 2014 | 50 hrs | 36,505 (21%) | Winter Storm |
Over the 12 years from 2014 to 2025, Rockingham County recorded 1,725 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Rockingham County started October 30, 2017 (Tropical Storm Philippe), lasting 116 hours and leaving up to 80,811 customers without power (47% of the county) at its peak.
July has historically been the worst month for outages in Rockingham County, with 231 events recorded during that month across the dataset.
Based on this history, Rockingham County earns a Reliability Grade of D, placing it in the 27th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Rockingham County's outage profile
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Similar counties in New Hampshire
Counties with the closest reliability grade and national percentile to Rockingham County.
| County | Grade | National percentile |
|---|---|---|
| Coos County | D | 27th |
| Grafton County | D | 26th |
| Merrimack County | D | 33rd |
| Hillsborough County | D | 33rd |
| Cheshire County | F | 18th |
FAQ
How often does power go out in Rockingham County?
Between 2014 and 2025, Rockingham County recorded 1,725 outage events, averaging 2.4 hours each.
What is Rockingham County's reliability grade?
Rockingham County has a Reliability Grade of D, in the 27th national percentile.
What was the worst power outage in Rockingham County?
The worst outage on record started October 30, 2017 (Tropical Storm Philippe), lasting 116 hours and affecting up to 80,811 customers.