Ranked from NOAA 1991-2020 Climate Normals
Highest Cooling Demand in Montana
Cooling degree days are the mirror of heating degree days: how far and how long the temperature sits above 65°F. In the counties at the top of this list, cooling is the largest single line on the summer electricity bill. 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 | Cooling degree days | Summer high | Monthly to own |
|---|---|---|---|---|
| 1 | Powder River County | 779 | 90.8°F | $1,272 |
| 2 | Dawson County | 751 | 87.7°F | $1,600 |
| 3 | Custer County | 731 | 88.7°F | $1,713 |
| 4 | Prairie County | 673 | 88.1°F | $1,404 |
| 5 | Rosebud County | 619 | 88.0°F | $1,526 |
| 6 | Richland County | 593 | 86.6°F | $2,045 |
| 7 | Treasure County | 573 | 87.6°F | $1,709 |
| 8 | Phillips County | 553 | 86.3°F | $1,460 |
| 9 | McCone County | 507 | 86.6°F | $1,593 |
| 10 | Carter County | 503 | 84.7°F | $1,412 |
| 11 | Garfield County | 491 | 87.6°F | $1,455 |
| 12 | Valley County | 486 | 84.5°F | $1,672 |
| 13 | Yellowstone County | 483 | 87.1°F | $2,488 |
| 14 | Musselshell County | 482 | 88.9°F | $1,752 |
| 15 | Big Horn County | 468 | 90.0°F | $1,285 |
| 16 | Fallon County | 468 | 85.4°F | $1,853 |
| 17 | Carbon County | 414 | 87.2°F | $2,840 |
| 18 | Chouteau County | 413 | 87.6°F | $1,522 |
| 19 | Petroleum County | 411 | 85.7°F | $1,433 |
| 20 | Hill County | 406 | 85.8°F | $1,587 |
| 21 | Mineral County | 400 | 88.5°F | $2,383 |
| 22 | Lincoln County | 379 | 89.5°F | $2,006 |
| 23 | Sweet Grass County | 374 | 86.2°F | $2,242 |
| 24 | Wibaux County | 353 | 84.2°F | $852 |
| 25 | Blaine County | 347 | 84.3°F | $1,168 |
| 26 | Roosevelt County | 332 | 83.6°F | $1,102 |
| 27 | Cascade County | 310 | 84.3°F | $1,967 |
| 28 | Missoula County | 306 | 85.4°F | $3,272 |
| 29 | Daniels County | 305 | 84.2°F | $1,482 |
| 30 | Sheridan County | 296 | 82.3°F | $1,043 |
| 31 | Lake County | 295 | 82.8°F | $2,804 |
| 32 | Flathead County | 293 | 82.3°F | $3,482 |
| 33 | Liberty County | 256 | 82.5°F | $1,057 |
| 34 | Broadwater County | 253 | 83.4°F | $2,757 |
| 35 | Pondera County | 246 | 81.5°F | $1,495 |
| 36 | Toole County | 242 | 82.2°F | $1,567 |
| 37 | Stillwater County | 241 | 85.4°F | $2,690 |
| 38 | Park County | 240 | 82.4°F | $3,200 |
| 39 | Gallatin County | 232 | 85.4°F | $4,439 |
| 40 | Wheatland County | 231 | 83.9°F | $1,415 |
| 41 | Fergus County | 229 | 81.6°F | $1,659 |
| 42 | Golden Valley County | 229 | 81.6°F | $1,611 |
| 43 | Lewis and Clark County | 218 | 81.5°F | $2,770 |
| 44 | Madison County | 183 | 82.6°F | $3,216 |
| 45 | Ravalli County | 178 | 81.8°F | $3,222 |
| 46 | Deer Lodge County | 177 | 82.7°F | $1,704 |
| 47 | Jefferson County | 157 | 82.5°F | $3,044 |
| 48 | Teton County | 155 | 82.0°F | $1,891 |
| 49 | Meagher County | 150 | 81.6°F | $1,930 |
| 50 | Silver Bow County | 83 | 81.3°F | $1,849 |
| 51 | Granite County | 60 | 80.8°F | $2,580 |
| 52 | Judith Basin County | 46 | 77.5°F | $1,672 |
| 53 | Powell County | 43 | 80.4°F | $2,013 |
| 54 | Beaverhead County | 35 | 80.9°F | $2,190 |
| 55 | Sanders County | 27 | 77.9°F | $2,454 |
| 56 | Glacier County | 21 | 73.4°F | $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
Highest Cooling Demand across all 3,133 US counties · Every county in Montana