New Jersey winter weather risk
Middlesex County has the highest winter weather risk in New Jersey, scoring 99.6 out of 100 — rated "Very High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Middlesex County | 99.6 | Very High | 0 |
| 2 | Camden County | 99.4 | Very High | 0 |
| 3 | Ocean County | 99.4 | Very High | 0 |
| 4 | Bergen County | 98.6 | Very High | 0 |
| 5 | Burlington County | 98.5 | Very High | 0 |
| 6 | Union County | 98.5 | Very High | 0 |
| 7 | Mercer County | 97.7 | Very High | 0 |
| 8 | Passaic County | 97.7 | Very High | 0 |
| 9 | Monmouth County | 97.5 | Very High | 0 |
| 10 | Atlantic County | 97.1 | Very High | 0 |
| 11 | Essex County | 97 | Very High | 0 |
| 12 | Gloucester County | 96.9 | Very High | 0 |
| 13 | Morris County | 96.5 | Very High | 0 |
| 14 | Hudson County | 95.2 | Relatively High | 0 |
| 15 | Cumberland County | 94.7 | Relatively High | 0 |
| 16 | Somerset County | 94.2 | Relatively High | 0 |
| 17 | Cape May County | 88.6 | Relatively High | 0 |
| 18 | Salem County | 83.7 | Relatively Moderate | 0 |
| 19 | Warren County | 83.4 | Relatively Moderate | 0 |
| 20 | Hunterdon County | 81.8 | Relatively Moderate | 0 |
| 21 | Sussex County | 78.8 | Relatively Moderate | 0 |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Winter Weather risk nationally:
Other hazard risks in New Jersey:
Frequently asked questions
What is the highest winter weather risk county in New Jersey?
Middlesex County, NJ has the highest winter weather risk in New Jersey, with a FEMA National Risk Index score of 99.6 out of 100 (rated "Very High").
How many counties in New Jersey are rated Very High for winter weather risk?
13 of 21 scored New Jersey counties are rated "Very High" for winter weather risk by FEMA's National Risk Index.
What causes winter weather risk in New Jersey?
Winter weather risk captures expected losses from heavy snow, blizzards, and mixed precipitation. Highest scores appear in the Great Lakes snowbelt, northern Rockies, and interior Northeast, where lake-effect and orographic snowfall is frequent. Winter weather impacts transportation networks, utilities, agriculture, and population health.