Ranked from NOAA 1991-2020 Climate Normals
Wettest Counties in Idaho
Total annual precipitation by county, wettest first. Rainfall drives roof and siding wear, basement water, and in much of the country the flood component of the insurance premium. Figures are NOAA 1991-2020 Climate Normals from the weather station nearest each county seat, so they describe a thirty-year average rather than any single year.
Idaho ranked
| # | County | Annual rainfall | FEMA risk rating | Median home |
|---|---|---|---|---|
| 1 | Shoshone County | 45.1" | Relatively Low | $222,700 |
| 2 | Clearwater County | 40.9" | Relatively Low | $240,800 |
| 3 | Bonner County | 34.0" | Relatively Low | $433,400 |
| 4 | Benewah County | 31.1" | Very Low | $255,800 |
| 5 | Idaho County | 30.6" | Relatively Low | $284,600 |
| 6 | Kootenai County | 25.4" | Relatively Low | $467,400 |
| 7 | Valley County | 24.0" | Relatively Low | $599,500 |
| 8 | Adams County | 23.1" | Very Low | $327,300 |
| 9 | Gem County | 22.5" | Very Low | $367,300 |
| 10 | Washington County | 21.4" | Very Low | $250,300 |
| 11 | Boundary County | 21.1" | Very Low | $344,100 |
| 12 | Lewis County | 20.0" | Very Low | $202,400 |
| 13 | Fremont County | 19.7" | Very Low | $281,800 |
| 14 | Teton County | 19.4" | Very Low | $595,900 |
| 15 | Bear Lake County | 17.9" | Very Low | $234,200 |
| 16 | Latah County | 17.5" | Very Low | $342,500 |
| 17 | Bonneville County | 17.3" | Relatively Moderate | $327,000 |
| 18 | Franklin County | 17.3" | Very Low | $304,000 |
| 19 | Caribou County | 15.7" | Very Low | $220,200 |
| 20 | Bannock County | 15.5" | Relatively Low | $267,200 |
| 21 | Camas County | 14.6" | Very Low | $248,900 |
| 22 | Oneida County | 13.1" | Very Low | $228,100 |
| 23 | Blaine County | 13.0" | Relatively Low | $663,800 |
| 24 | Nez Perce County | 12.9" | Very Low | $291,300 |
| 25 | Clark County | 12.5" | Very Low | $203,000 |
| 26 | Bingham County | 12.1" | Relatively Low | $258,000 |
| 27 | Madison County | 12.0" | Relatively Low | $365,000 |
| 28 | Ada County | 11.5" | Relatively Moderate | $476,000 |
| 29 | Boise County | 11.5" | Relatively Low | $424,100 |
| 30 | Elmore County | 11.5" | Relatively Low | $278,300 |
| 31 | Owyhee County | 11.3" | Relatively Low | $281,600 |
| 32 | Power County | 11.1" | Very Low | $191,200 |
| 33 | Lincoln County | 10.5" | Very Low | $206,700 |
| 34 | Cassia County | 10.3" | Relatively Low | $257,300 |
| 35 | Minidoka County | 10.3" | Very Low | $235,300 |
| 36 | Twin Falls County | 10.3" | Relatively Low | $292,700 |
| 37 | Jefferson County | 10.1" | Very Low | $335,000 |
| 38 | Canyon County | 10.0" | Relatively Low | $350,300 |
| 39 | Jerome County | 9.9" | Very Low | $254,000 |
| 40 | Gooding County | 9.8" | Very Low | $231,800 |
| 41 | Payette County | 9.5" | Very Low | $310,700 |
| 42 | Butte County | 8.8" | Very Low | $195,800 |
| 43 | Custer County | 6.9" | Relatively Low | $295,600 |
| 44 | Lemhi County | 6.9" | Very Low | $282,100 |
Every figure is modelled on the county's own median home with 20% down at 7.03%. Property tax and electricity are county and state specific; homeowners insurance uses the NAIC average premium for that state, which ranges from 0.16% of home value in Hawaii to 1.16% in Oklahoma. Maintenance and water are national estimates. Full methodology.
Nationwide
Wettest Counties across all 3,133 US counties · Every county in Idaho