Maryland winter weather risk
Baltimore County has the highest winter weather risk in Maryland, scoring 99.7 out of 100 — rated "Very High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Baltimore County | 99.7 | Very High | 0 |
| 2 | Montgomery County | 99.2 | Very High | 0 |
| 3 | Prince George's County | 99.1 | Very High | 0 |
| 4 | Baltimore | 97.8 | Very High | 0 |
| 5 | Anne Arundel County | 95.9 | Relatively High | 0 |
| 6 | Harford County | 94 | Relatively High | 0 |
| 7 | Howard County | 92.7 | Relatively High | 0 |
| 8 | Frederick County | 90.6 | Relatively High | 0 |
| 9 | Cecil County | 87.1 | Relatively High | 0 |
| 10 | Carroll County | 85.9 | Relatively High | 0 |
| 11 | Washington County | 81.2 | Relatively Moderate | 0 |
| 12 | Wicomico County | 78.7 | Relatively Moderate | 0 |
| 13 | Worcester County | 74.1 | Relatively Moderate | 0 |
| 14 | Allegany County | 72.8 | Relatively Moderate | 0 |
| 15 | Charles County | 71 | Relatively Moderate | 0 |
| 16 | Garrett County | 64.3 | Relatively Moderate | 0 |
| 17 | Queen Anne's County | 64.1 | Relatively Moderate | 0 |
| 18 | Caroline County | 63.9 | Relatively Moderate | 0 |
| 19 | St. Mary's County | 58.1 | Relatively Low | 0 |
| 20 | Talbot County | 57.3 | Relatively Low | 0 |
| 21 | Calvert County | 53.2 | Relatively Low | 0 |
| 22 | Kent County | 46 | Relatively Low | 0 |
| 23 | Dorchester County | 44.9 | Relatively Low | 0 |
| 24 | Somerset County | 38.5 | 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 Maryland:
Frequently asked questions
What is the highest winter weather risk county in Maryland?
Baltimore County, MD has the highest winter weather risk in Maryland, with a FEMA National Risk Index score of 99.7 out of 100 (rated "Very High").
How many counties in Maryland are rated Very High for winter weather risk?
4 of 24 scored Maryland counties are rated "Very High" for winter weather risk by FEMA's National Risk Index.
What causes winter weather risk in Maryland?
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.