Months in Drought by County
The share of months from 1991 to 2020 in moderate drought or worse, by the Palmer Drought Severity Index. A desert that is reliably dry is not in drought; drought means dry for where you are.
See Months in Drought on the interactive map →
Highest counties
| County | Months in Drought |
|---|---|
| Apache County, Arizona | 59.2% |
| Navajo County, Arizona | 57.2% |
| San Diego County, California | 55.0% |
| Riverside County, California | 51.9% |
| Lyon County, Nevada | 51.4% |
| Crook County, Oregon | 51.4% |
| Harney County, Oregon | 50.8% |
| Gila County, Arizona | 50.0% |
| Los Angeles County, California | 49.7% |
| San Bernardino County, California | 48.9% |
| Santa Cruz County, Arizona | 48.6% |
| Mineral County, Nevada | 48.6% |
Lowest counties
| County | Months in Drought |
|---|---|
| Sargent County, North Dakota | 1.1% |
| Richland County, Wisconsin | 1.4% |
| Grant County, Wisconsin | 1.4% |
| Crawford County, Wisconsin | 1.4% |
| Roberts County, South Dakota | 1.4% |
| Miner County, South Dakota | 1.4% |
| Marshall County, South Dakota | 1.4% |
| Clayton County, Iowa | 1.4% |
| Steele County, North Dakota | 1.7% |
| Houston County, Minnesota | 1.7% |
| Vernon County, Wisconsin | 1.9% |
| La Crosse County, Wisconsin | 1.9% |