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Pennsylvania winter weather risk

67 counties scored 11 rated Very High

Montgomery County has the highest winter weather risk in Pennsylvania, scoring 99.8 out of 100 — rated "Very High" by FEMA's National Risk Index.

# County NRI score Rating NOAA events
2016–2026
1 Montgomery County 99.8 Very High 0
2 Philadelphia County 99.8 Very High 0
3 Lancaster County 99.5 Very High 0
4 Berks County 99.4 Very High 0
5 Delaware County 99.2 Very High 0
6 Bucks County 99.1 Very High 0
7 Lehigh County 98.8 Very High 0
8 Chester County 98.4 Very High 0
9 Dauphin County 98.2 Very High 0
10 York County 97.6 Very High 0
11 Luzerne County 97.2 Very High 0
12 Northampton County 96.5 Relatively High 0
13 Schuylkill County 96.1 Relatively High 0
14 Erie County 95 Relatively High 0
15 Centre County 94.4 Relatively High 0
16 Cumberland County 94.1 Relatively High 0
17 Allegheny County 93.3 Relatively High 0
18 Monroe County 93.2 Relatively High 0
19 Blair County 92.6 Relatively High 0
20 Lackawanna County 92.4 Relatively High 0
21 Lebanon County 92 Relatively High 0
22 Northumberland County 91.2 Relatively High 0
23 Clearfield County 90 Relatively High 0
24 Lycoming County 89 Relatively High 0
25 Crawford County 88.9 Relatively High 0
26 Columbia County 83.2 Relatively Moderate 0
27 McKean County 81.9 Relatively Moderate 0
28 Franklin County 81.5 Relatively Moderate 0
29 Mifflin County 80.7 Relatively Moderate 0
30 Jefferson County 80.2 Relatively Moderate 0
31 Snyder County 79.9 Relatively Moderate 0
32 Union County 79.9 Relatively Moderate 0
33 Carbon County 78.7 Relatively Moderate 0
34 Mercer County 77.9 Relatively Moderate 0
35 Perry County 77 Relatively Moderate 0
36 Huntingdon County 76.1 Relatively Moderate 0
37 Tioga County 75.5 Relatively Moderate 0
38 Somerset County 75.2 Relatively Moderate 0
39 Cambria County 74.6 Relatively Moderate 0
40 Clinton County 73.1 Relatively Moderate 0
41 Adams County 71.5 Relatively Moderate 0
42 Westmoreland County 70.4 Relatively Moderate 0
43 Elk County 67.5 Relatively Moderate 0
44 Butler County 67.3 Relatively Moderate 0
45 Juniata County 65.8 Relatively Moderate 0
46 Pike County 63.7 Relatively Moderate 0
47 Fayette County 58.2 Relatively Low 0
48 Wayne County 55.3 Relatively Low 0
49 Montour County 54.3 Relatively Low 0
50 Potter County 52.3 Relatively Low 0
51 Lawrence County 50.1 Relatively Low 0
52 Venango County 46.2 Relatively Low 0
53 Warren County 41.2 Relatively Low 0
54 Susquehanna County 40.8 Relatively Low 0
55 Wyoming County 40.6 Relatively Low 0
56 Bedford County 37.9 Relatively Low 0
57 Beaver County 35.5 Relatively Low 0
58 Clarion County 31.6 Relatively Low 0
59 Sullivan County 30.8 Relatively Low 0
60 Cameron County 25 Relatively Low 0
61 Fulton County 21.7 Very Low 0
62 Washington County 19.4 Very Low 0
63 Greene County 14.3 Very Low 0
64 Forest County 12.8 Very Low 0
65 Bradford County 9.8 Very Low 2
66 Indiana County 9.2 Very Low 0
67 Armstrong County 4.8 Very 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:

Top 50 US counties

Other hazard risks in Pennsylvania:

WildfireInland FloodingCoastal FloodingEarthquakeHeat WaveTornadoHurricaneHailStrong WindIce StormCold WaveLightningDroughtLandslideAvalancheTsunamiVolcanic Activity

Frequently asked questions

What is the highest winter weather risk county in Pennsylvania?

Montgomery County, PA has the highest winter weather risk in Pennsylvania, with a FEMA National Risk Index score of 99.8 out of 100 (rated "Very High").

How many counties in Pennsylvania are rated Very High for winter weather risk?

11 of 67 scored Pennsylvania counties are rated "Very High" for winter weather risk by FEMA's National Risk Index.

What causes winter weather risk in Pennsylvania?

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.