Connecticut winter weather risk
Western Connecticut Planning Region has the highest winter weather risk in Connecticut, scoring 94.3 out of 100 — rated "Relatively High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Western Connecticut Planning Region | 94.3 | Relatively High | 0 |
| 2 | South Central Connecticut Planning Region | 91.3 | Relatively High | 0 |
| 3 | Greater Bridgeport Planning Region | 88.7 | Relatively High | 0 |
| 4 | Naugatuck Valley Planning Region | 88 | Relatively High | 0 |
| 5 | Capitol Planning Region | 85.7 | Relatively High | 0 |
| 6 | Southeastern Connecticut Planning Region | 76.8 | Relatively Moderate | 0 |
| 7 | Lower Connecticut River Valley Planning Region | 65 | Relatively Moderate | 0 |
| 8 | Northwest Hills Planning Region | 51.2 | Relatively Low | 0 |
| 9 | Northeastern Connecticut Planning Region | 42.6 | Relatively Low | 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 Connecticut:
Frequently asked questions
What is the highest winter weather risk county in Connecticut?
Western Connecticut Planning Region, CT has the highest winter weather risk in Connecticut, with a FEMA National Risk Index score of 94.3 out of 100 (rated "Relatively High").
What causes winter weather risk in Connecticut?
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.