Winter Weather Risk in California
All California counties ranked by FEMA National Risk Index winter weather score
Winter Weather risk — heavy snow, blizzards, and hazardous winter conditions — is rated for 58 of 58 California counties in FEMA's National Risk Index. Calaveras County carries the state's highest winter weather score at 91.6, with $394K in expected annual winter weather losses.
3 California counties are rated High or Very High for winter weather, and expected annual losses from winter weather total roughly $3M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Winter Weather
| # | County | Winter Weather Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Calaveras County | High | 16.49 / yr | $394K | |
| 2 | Amador County | High | 17.29 / yr | $299K | |
| 3 | El Dorado County | High | 28.49 / yr | $345K | |
| 4 | Mono County | Medium | 25.46 / yr | $306K | |
| 5 | Lassen County | Medium | 25.89 / yr | $191K | |
| 6 | Kern County | Medium | 5.43 / yr | $190K | |
| 7 | Mariposa County | Medium | 12.67 / yr | $113K | |
| 8 | Los Angeles County | Medium | 6.59 / yr | $142K | |
| 9 | Siskiyou County | Medium | 29.71 / yr | $118K | |
| 10 | Shasta County | Medium | 20.88 / yr | $131K | |
| 11 | Nevada County | Medium | 28.31 / yr | $124K | |
| 12 | Madera County | Medium | 11.93 / yr | $85K | |
| 13 | Riverside County | Medium | 2.40 / yr | $119K | |
| 14 | Plumas County | Medium | 34.93 / yr | $73K | |
| 15 | Tuolumne County | Medium | 33.02 / yr | $95K | |
| 16 | Alpine County | Low | 38.99 / yr | $61K | |
| 17 | Inyo County | Low | 4.55 / yr | $44K | |
| 18 | San Bernardino County | Low | 2.11 / yr | $62K | |
| 19 | San Diego County | Low | 3.67 / yr | $67K | |
| 20 | Placer County | Low | 27.20 / yr | $73K | |
| 21 | San Joaquin County | Low | 0.20 / yr | $49K | |
| 22 | Stanislaus County | Low | 0.22 / yr | $41K | |
| 23 | Modoc County | Low | 16.64 / yr | $29K | |
| 24 | Sierra County | Low | 36.59 / yr | $29K | |
| 25 | Santa Cruz County | Low | 1.00 / yr | $35K | |
| 26 | Lake County | Low | 8.75 / yr | $20K | |
| 27 | Butte County | Low | 10.95 / yr | $21K | |
| 28 | Tulare County | Very Low | 13.19 / yr | $18K | |
| 29 | Mendocino County | Very Low | 6.77 / yr | $15K | |
| 30 | Merced County | Very Low | 0.24 / yr | $14K | |
| 31 | Fresno County | Very Low | 11.06 / yr | $13K | |
| 32 | Humboldt County | Very Low | 13.86 / yr | $6K | |
| 33 | Del Norte County | Very Low | 13.27 / yr | $6K | |
| 34 | Yuba County | Very Low | 5.04 / yr | $8K | |
| 35 | Contra Costa County | Very Low | 0.44 / yr | $8K | |
| 36 | Sonoma County | Very Low | 0.74 / yr | $6K | |
| 37 | Trinity County | Very Low | 24.15 / yr | $4K | |
| 38 | Sacramento County | Very Low | 0.06 / yr | $5K | |
| 39 | Monterey County | Very Low | 1.50 / yr | $4K | |
| 40 | Sutter County | Very Low | 0.22 / yr | $3K | |
| 41 | Alameda County | Very Low | 0.69 / yr | $3K | |
| 42 | Solano County | Very Low | 0.10 / yr | $3K | |
| 43 | Napa County | Very Low | 1.14 / yr | $3K | |
| 44 | Marin County | Very Low | 0.39 / yr | $3K | |
| 45 | San Mateo County | Very Low | 0.61 / yr | $3K | |
| 46 | Santa Clara County | Very Low | 1.11 / yr | $2K | |
| 47 | Kings County | Very Low | 0.35 / yr | $1K | |
| 48 | San Luis Obispo County | Very Low | 1.05 / yr | $2K | |
| 49 | Tehama County | Very Low | 13.47 / yr | $1K | |
| 50 | Yolo County | Very Low | 0.07 / yr | $734 | |
| 51 | San Benito County | Very Low | 1.54 / yr | $712 | |
| 52 | Colusa County | Very Low | 4.21 / yr | $476 | |
| 53 | Ventura County | Very Low | 9.38 / yr | $276 | |
| 54 | Santa Barbara County | Very Low | 3.78 / yr | $185 | |
| 55 | Orange County | Very Low | 0.20 / yr | $133 | |
| 56 | Glenn County | Very Low | 6.66 / yr | $173 | |
| 57 | San Francisco County | Very Low | 0.00 / yr | $0 | |
| 58 | Imperial County | Very Low | 0.00 / yr | $0 |
58 California counties with measurable winter weather risk. See the national winter weather ranking or all California counties by overall risk.
Frequently Asked Questions
Which California county has the highest winter weather risk?
Calaveras County has the highest FEMA winter weather risk score in California at 91.6 (High), with $394K in expected annual losses and about 16.49 events per year.
How many California counties face significant winter weather risk?
58 California counties record measurable winter weather risk in FEMA's National Risk Index; 3 of them are rated High or Very High.