Ranked from NOAA 1991-2020 Climate Normals
Wettest Counties in Montana
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.
Montana ranked
| # | County | Annual rainfall | FEMA risk rating | Median home |
|---|---|---|---|---|
| 1 | Flathead County | 34.6" | Relatively Moderate | $467,700 |
| 2 | Glacier County | 26.1" | Relatively Low | $153,400 |
| 3 | Sanders County | 22.3" | Relatively Low | $323,800 |
| 4 | Lincoln County | 19.1" | Relatively Low | $258,700 |
| 5 | Fergus County | 17.2" | Relatively Low | $202,700 |
| 6 | Golden Valley County | 17.2" | Very Low | $203,900 |
| 7 | Lewis and Clark County | 17.1" | Relatively Low | $358,200 |
| 8 | Sweet Grass County | 16.9" | Very Low | $295,500 |
| 9 | Judith Basin County | 16.8" | Very Low | $214,200 |
| 10 | Granite County | 16.5" | Very Low | $339,500 |
| 11 | Big Horn County | 16.5" | Relatively Low | $148,200 |
| 12 | Mineral County | 16.4" | Very Low | $313,600 |
| 13 | Park County | 16.3" | Relatively Low | $429,700 |
| 14 | Wibaux County | 16.1" | Very Low | $92,300 |
| 15 | Rosebud County | 16.0" | Relatively Low | $188,900 |
| 16 | Carter County | 15.7" | Very Low | $176,600 |
| 17 | Madison County | 15.7" | Very Low | $440,500 |
| 18 | Stillwater County | 15.5" | Very Low | $355,600 |
| 19 | Richland County | 15.5" | Relatively Low | $259,000 |
| 20 | Ravalli County | 15.1" | Relatively Low | $435,000 |
| 21 | Lake County | 15.0" | Relatively Low | $369,200 |
| 22 | Powder River County | 14.9" | Very Low | $149,400 |
| 23 | Treasure County | 14.9" | Very Low | $215,300 |
| 24 | Dawson County | 14.9" | Relatively Low | $187,400 |
| 25 | Deer Lodge County | 14.9" | Very Low | $209,700 |
| 26 | Musselshell County | 14.9" | Very Low | $221,200 |
| 27 | Cascade County | 14.8" | Relatively Moderate | $243,300 |
| 28 | Sheridan County | 14.7" | Very Low | $111,600 |
| 29 | Petroleum County | 14.6" | Very Low | $173,700 |
| 30 | Fallon County | 14.6" | Very Low | $237,000 |
| 31 | Yellowstone County | 14.4" | Relatively Moderate | $317,600 |
| 32 | Roosevelt County | 14.2" | Relatively Low | $119,400 |
| 33 | Missoula County | 14.1" | Relatively Low | $423,100 |
| 34 | Daniels County | 13.5" | Very Low | $177,800 |
| 35 | Blaine County | 13.5" | Relatively Low | $124,900 |
| 36 | Gallatin County | 13.4" | Relatively Moderate | $604,900 |
| 37 | Prairie County | 13.4" | Very Low | $167,100 |
| 38 | Phillips County | 13.3" | Very Low | $175,000 |
| 39 | Wheatland County | 13.2" | Very Low | $172,700 |
| 40 | Meagher County | 13.0" | Very Low | $244,400 |
| 41 | Garfield County | 12.9" | Very Low | $178,300 |
| 42 | Custer County | 12.9" | Very Low | $204,200 |
| 43 | Chouteau County | 12.8" | Very Low | $185,100 |
| 44 | Silver Bow County | 12.8" | Very Low | $223,500 |
| 45 | Pondera County | 12.6" | Very Low | $179,200 |
| 46 | Liberty County | 12.3" | Very Low | $116,800 |
| 47 | McCone County | 12.2" | Very Low | $197,400 |
| 48 | Toole County | 12.1" | Very Low | $187,400 |
| 49 | Teton County | 11.9" | Very Low | $235,500 |
| 50 | Hill County | 11.8" | Relatively Low | $187,600 |
| 51 | Powell County | 11.8" | Very Low | $255,700 |
| 52 | Valley County | 11.8" | Very Low | $198,600 |
| 53 | Carbon County | 11.5" | Relatively Low | $379,300 |
| 54 | Jefferson County | 10.8" | Very Low | $408,000 |
| 55 | Broadwater County | 10.6" | Very Low | $364,800 |
| 56 | Beaverhead County | 10.1" | Relatively Low | $282,000 |
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 Montana