Cheshire County Power Outage History
2014–2025 · New Hampshire
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Mar 14, 2023 | 81 hrs | 19,245 (53%) | Winter Storm |
| Jun 18, 2018 | 28 hrs | 13,115 (36%) | Thunderstorm Wind |
| Jan 23, 2023 | 69 hrs | 11,380 (31%) | Winter Storm |
| Mar 23, 2024 | 50 hrs | 11,033 (30%) | Winter Storm |
| Mar 6, 2025 | 0 hrs | 10,451 (29%) | Unnamed event |
Over the 12 years from 2014 to 2025, Cheshire County recorded 740 distinct power outage events, averaging 3.4 hours per event.
The single worst outage on record in Cheshire County started March 14, 2023 (Winter Storm), lasting 81 hours and leaving up to 19,245 customers without power (53% of the county) at its peak.
November has historically been the worst month for outages in Cheshire County, with 88 events recorded during that month across the dataset.
Based on this history, Cheshire County earns a Reliability Grade of F, placing it in the 18th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in New Hampshire
Counties with the closest reliability grade and national percentile to Cheshire County.
| County | Grade | National percentile |
|---|---|---|
| Sullivan County | F | 16th |
| Carroll County | F | 11th |
| Grafton County | D | 26th |
| Rockingham County | D | 27th |
| Coos County | D | 27th |
FAQ
How often does power go out in Cheshire County?
Between 2014 and 2025, Cheshire County recorded 740 outage events, averaging 3.4 hours each.
What is Cheshire County's reliability grade?
Cheshire County has a Reliability Grade of F, in the 18th national percentile.
What was the worst power outage in Cheshire County?
The worst outage on record started March 14, 2023 (Winter Storm), lasting 81 hours and affecting up to 19,245 customers.