Cold Wave Risk in New Hampshire
All New Hampshire counties ranked by FEMA National Risk Index cold wave score
Cold Wave risk — prolonged spells of dangerously low temperatures — is rated for 10 of 10 New Hampshire counties in FEMA's National Risk Index. Coos County carries the state's highest cold wave score at 87.4, with $5M in expected annual cold wave losses.
No New Hampshire county reaches the High band for cold wave, and expected annual losses from cold wave total roughly $16M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Cold Wave
| # | County | Cold Wave Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Coos County | Medium | 6.81 / yr | $5M | |
| 2 | Hillsborough County | Medium | 1.72 / yr | $3M | |
| 3 | Rockingham County | Low | 1.40 / yr | $2M | |
| 4 | Grafton County | Low | 3.92 / yr | $1M | |
| 5 | Merrimack County | Low | 1.74 / yr | $1M | |
| 6 | Cheshire County | Low | 1.95 / yr | $1M | |
| 7 | Carroll County | Low | 2.73 / yr | $800K | |
| 8 | Strafford County | Low | 1.63 / yr | $861K | |
| 9 | Sullivan County | Low | 2.11 / yr | $683K | |
| 10 | Belknap County | Low | 1.95 / yr | $577K |
10 New Hampshire counties with measurable cold wave risk. See the national cold wave ranking or all New Hampshire counties by overall risk.
Frequently Asked Questions
Which New Hampshire county has the highest cold wave risk?
Coos County has the highest FEMA cold wave risk score in New Hampshire at 87.4 (Medium), with $5M in expected annual losses and about 6.81 events per year.
How many New Hampshire counties face significant cold wave risk?
10 New Hampshire counties record measurable cold wave risk in FEMA's National Risk Index; 0 of them are rated High or Very High.