Ranked from NOAA 1991-2020 Climate Normals
Hottest Summers in Montana
Average daily high in the hottest month of the year, by county. Read it next to the cooling degree days in the same row: the two together are what the summer electricity bill is actually made of. 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 | Summer high | Cooling degree days | Monthly to own |
|---|---|---|---|---|
| 1 | Powder River County | 90.8°F | 779 | $1,272 |
| 2 | Big Horn County | 90.0°F | 468 | $1,285 |
| 3 | Lincoln County | 89.5°F | 379 | $2,006 |
| 4 | Musselshell County | 88.9°F | 482 | $1,752 |
| 5 | Custer County | 88.7°F | 731 | $1,713 |
| 6 | Mineral County | 88.5°F | 400 | $2,383 |
| 7 | Prairie County | 88.1°F | 673 | $1,404 |
| 8 | Rosebud County | 88.0°F | 619 | $1,526 |
| 9 | Dawson County | 87.7°F | 751 | $1,600 |
| 10 | Chouteau County | 87.6°F | 413 | $1,522 |
| 11 | Garfield County | 87.6°F | 491 | $1,455 |
| 12 | Treasure County | 87.6°F | 573 | $1,709 |
| 13 | Carbon County | 87.2°F | 414 | $2,840 |
| 14 | Yellowstone County | 87.1°F | 483 | $2,488 |
| 15 | McCone County | 86.6°F | 507 | $1,593 |
| 16 | Richland County | 86.6°F | 593 | $2,045 |
| 17 | Phillips County | 86.3°F | 553 | $1,460 |
| 18 | Sweet Grass County | 86.2°F | 374 | $2,242 |
| 19 | Hill County | 85.8°F | 406 | $1,587 |
| 20 | Petroleum County | 85.7°F | 411 | $1,433 |
| 21 | Fallon County | 85.4°F | 468 | $1,853 |
| 22 | Gallatin County | 85.4°F | 232 | $4,439 |
| 23 | Missoula County | 85.4°F | 306 | $3,272 |
| 24 | Stillwater County | 85.4°F | 241 | $2,690 |
| 25 | Carter County | 84.7°F | 503 | $1,412 |
| 26 | Valley County | 84.5°F | 486 | $1,672 |
| 27 | Blaine County | 84.3°F | 347 | $1,168 |
| 28 | Cascade County | 84.3°F | 310 | $1,967 |
| 29 | Daniels County | 84.2°F | 305 | $1,482 |
| 30 | Wibaux County | 84.2°F | 353 | $852 |
| 31 | Wheatland County | 83.9°F | 231 | $1,415 |
| 32 | Roosevelt County | 83.6°F | 332 | $1,102 |
| 33 | Broadwater County | 83.4°F | 253 | $2,757 |
| 34 | Lake County | 82.8°F | 295 | $2,804 |
| 35 | Deer Lodge County | 82.7°F | 177 | $1,704 |
| 36 | Madison County | 82.6°F | 183 | $3,216 |
| 37 | Jefferson County | 82.5°F | 157 | $3,044 |
| 38 | Liberty County | 82.5°F | 256 | $1,057 |
| 39 | Park County | 82.4°F | 240 | $3,200 |
| 40 | Flathead County | 82.3°F | 293 | $3,482 |
| 41 | Sheridan County | 82.3°F | 296 | $1,043 |
| 42 | Toole County | 82.2°F | 242 | $1,567 |
| 43 | Teton County | 82.0°F | 155 | $1,891 |
| 44 | Ravalli County | 81.8°F | 178 | $3,222 |
| 45 | Fergus County | 81.6°F | 229 | $1,659 |
| 46 | Golden Valley County | 81.6°F | 229 | $1,611 |
| 47 | Meagher County | 81.6°F | 150 | $1,930 |
| 48 | Lewis and Clark County | 81.5°F | 218 | $2,770 |
| 49 | Pondera County | 81.5°F | 246 | $1,495 |
| 50 | Silver Bow County | 81.3°F | 83 | $1,849 |
| 51 | Beaverhead County | 80.9°F | 35 | $2,190 |
| 52 | Granite County | 80.8°F | 60 | $2,580 |
| 53 | Powell County | 80.4°F | 43 | $2,013 |
| 54 | Sanders County | 77.9°F | 27 | $2,454 |
| 55 | Judith Basin County | 77.5°F | 46 | $1,672 |
| 56 | Glacier County | 73.4°F | 21 | $1,299 |
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
Hottest Summers across all 3,133 US counties · Every county in Montana