Ranked from NOAA 1991-2020 Climate Normals
Coldest Winters in Montana
Average daily low in the coldest month, coldest counties first, with the heating degree days beside it. 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 | Winter low | Heating degree days | Monthly to own |
|---|---|---|---|---|
| 1 | Sheridan County | -1.8°F | 9,573 | $1,043 |
| 2 | Daniels County | -0.7°F | 9,292 | $1,482 |
| 3 | Roosevelt County | -0.1°F | 9,210 | $1,102 |
| 4 | McCone County | 2.2°F | 8,494 | $1,593 |
| 5 | Liberty County | 2.6°F | 8,848 | $1,057 |
| 6 | Garfield County | 4.9°F | 8,043 | $1,455 |
| 7 | Wibaux County | 5.0°F | 8,692 | $852 |
| 8 | Valley County | 5.7°F | 8,452 | $1,672 |
| 9 | Blaine County | 5.9°F | 8,474 | $1,168 |
| 10 | Prairie County | 6.1°F | 7,828 | $1,404 |
| 11 | Toole County | 6.1°F | 8,532 | $1,567 |
| 12 | Petroleum County | 6.3°F | 8,058 | $1,433 |
| 13 | Beaverhead County | 6.5°F | 9,590 | $2,190 |
| 14 | Richland County | 6.5°F | 7,770 | $2,045 |
| 15 | Phillips County | 6.6°F | 7,826 | $1,460 |
| 16 | Fallon County | 7.0°F | 8,276 | $1,853 |
| 17 | Chouteau County | 7.2°F | 7,741 | $1,522 |
| 18 | Hill County | 7.2°F | 8,174 | $1,587 |
| 19 | Silver Bow County | 7.2°F | 9,129 | $1,849 |
| 20 | Carter County | 7.4°F | 8,011 | $1,412 |
| 21 | Powell County | 8.1°F | 9,521 | $2,013 |
| 22 | Custer County | 8.9°F | 7,566 | $1,713 |
| 23 | Dawson County | 9.2°F | 7,417 | $1,600 |
| 24 | Gallatin County | 9.7°F | 8,244 | $4,439 |
| 25 | Stillwater County | 10.0°F | 7,736 | $2,690 |
| 26 | Rosebud County | 10.2°F | 7,248 | $1,526 |
| 27 | Big Horn County | 10.4°F | 7,375 | $1,285 |
| 28 | Powder River County | 11.4°F | 6,871 | $1,272 |
| 29 | Jefferson County | 11.5°F | 8,312 | $3,044 |
| 30 | Yellowstone County | 11.8°F | 7,355 | $2,488 |
| 31 | Judith Basin County | 12.1°F | 8,917 | $1,672 |
| 32 | Treasure County | 12.4°F | 7,011 | $1,709 |
| 33 | Carbon County | 12.9°F | 7,414 | $2,840 |
| 34 | Fergus County | 12.9°F | 8,177 | $1,659 |
| 35 | Golden Valley County | 12.9°F | 8,177 | $1,611 |
| 36 | Meagher County | 12.9°F | 8,465 | $1,930 |
| 37 | Pondera County | 13.0°F | 7,823 | $1,495 |
| 38 | Musselshell County | 13.1°F | 7,193 | $1,752 |
| 39 | Wheatland County | 13.3°F | 7,934 | $1,415 |
| 40 | Teton County | 13.4°F | 7,845 | $1,891 |
| 41 | Broadwater County | 13.7°F | 7,544 | $2,757 |
| 42 | Madison County | 13.9°F | 7,856 | $3,216 |
| 43 | Granite County | 14.3°F | 8,422 | $2,580 |
| 44 | Glacier County | 14.5°F | 9,283 | $1,299 |
| 45 | Deer Lodge County | 14.7°F | 7,880 | $1,704 |
| 46 | Sanders County | 14.9°F | 9,042 | $2,454 |
| 47 | Cascade County | 15.0°F | 7,722 | $1,967 |
| 48 | Lewis and Clark County | 16.2°F | 7,893 | $2,770 |
| 49 | Missoula County | 17.8°F | 7,514 | $3,272 |
| 50 | Ravalli County | 19.2°F | 7,589 | $3,222 |
| 51 | Park County | 19.5°F | 7,278 | $3,200 |
| 52 | Sweet Grass County | 19.5°F | 6,910 | $2,242 |
| 53 | Flathead County | 19.8°F | 7,787 | $3,482 |
| 54 | Lincoln County | 21.5°F | 6,774 | $2,006 |
| 55 | Mineral County | 21.5°F | 6,694 | $2,383 |
| 56 | Lake County | 22.0°F | 7,130 | $2,804 |
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
Coldest Winters across all 3,133 US counties · Every county in Montana