Ranked from NOAA 1991-2020 Climate Normals
Coldest Winters in Illinois
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.
Where does yours land?
Every county in America is somewhere on this scale, including the one you live in.
Illinois ranked
| # | County | Winter low | Heating degree days | Monthly to own |
|---|---|---|---|---|
| 1 | Jo Daviess County | 10.4°F | 7,003 | $1,756 |
| 2 | Carroll County | 10.9°F | 6,733 | $1,138 |
| 3 | Stephenson County | 11.3°F | 6,956 | $1,300 |
| 4 | Whiteside County | 12.0°F | 6,747 | $1,250 |
| 5 | DeKalb County | 13.1°F | 6,745 | $2,214 |
| 6 | Mercer County | 13.3°F | 6,309 | $1,341 |
| 7 | Bureau County | 13.8°F | 6,401 | $1,211 |
| 8 | Stark County | 13.8°F | 6,407 | $1,022 |
| 9 | McHenry County | 14.2°F | 6,520 | $2,680 |
| 10 | Knox County | 14.3°F | 6,191 | $1,060 |
| 11 | Boone County | 14.5°F | 6,497 | $1,880 |
| 12 | Lee County | 14.5°F | 6,497 | $1,467 |
| 13 | Ogle County | 14.5°F | 6,497 | $1,721 |
| 14 | Winnebago County | 14.5°F | 6,497 | $1,540 |
| 15 | Henry County | 14.6°F | 6,139 | $1,395 |
| 16 | DuPage County | 14.7°F | 6,506 | $3,309 |
| 17 | Kendall County | 14.7°F | 6,433 | $2,793 |
| 18 | Warren County | 14.7°F | 6,099 | $1,026 |
| 19 | Rock Island County | 14.8°F | 6,024 | $1,432 |
| 20 | LaSalle County | 15.2°F | 6,211 | $1,496 |
| 21 | Iroquois County | 15.5°F | 6,047 | $1,228 |
| 22 | McLean County | 15.6°F | 6,023 | $1,878 |
| 23 | Grundy County | 15.7°F | 6,141 | $2,341 |
| 24 | Ford County | 15.8°F | 5,719 | $1,180 |
| 25 | McDonough County | 16.0°F | 5,886 | $1,067 |
| 26 | Cook County | 16.1°F | 6,364 | $2,709 |
| 27 | Kane County | 16.1°F | 6,364 | $2,792 |
| 28 | Kankakee County | 16.3°F | 5,983 | $1,764 |
| 29 | Lake County | 16.3°F | 6,366 | $3,073 |
| 30 | Fulton County | 16.4°F | 5,686 | $1,056 |
| 31 | Henderson County | 16.4°F | 5,820 | $1,010 |
| 32 | Mason County | 16.4°F | 5,686 | $1,087 |
| 33 | Edgar County | 16.6°F | 5,853 | $952 |
| 34 | Will County | 16.6°F | 6,171 | $2,740 |
| 35 | Putnam County | 16.8°F | 5,869 | $1,525 |
| 36 | Schuyler County | 17.0°F | 5,791 | $1,060 |
| 37 | Woodford County | 17.1°F | 5,752 | $1,825 |
| 38 | Livingston County | 17.2°F | 5,840 | $1,303 |
| 39 | Menard County | 17.3°F | 5,644 | $1,623 |
| 40 | Piatt County | 17.4°F | 5,858 | $1,591 |
| 41 | Peoria County | 17.6°F | 5,614 | $1,488 |
| 42 | Tazewell County | 17.6°F | 5,614 | $1,571 |
| 43 | Hancock County | 17.7°F | 5,590 | $1,081 |
| 44 | Brown County | 17.8°F | 5,406 | $1,309 |
| 45 | Logan County | 17.8°F | 5,624 | $1,220 |
| 46 | Scott County | 17.8°F | 5,485 | $986 |
| 47 | Champaign County | 17.9°F | 5,586 | $1,901 |
| 48 | Douglas County | 18.0°F | 5,635 | $1,353 |
| 49 | Marshall County | 18.0°F | 5,603 | $1,334 |
| 50 | Morgan County | 18.1°F | 5,510 | $1,248 |
| 51 | Greene County | 18.4°F | 5,477 | $951 |
| 52 | Moultrie County | 18.5°F | 5,449 | $1,192 |
| 53 | Pike County | 18.5°F | 5,301 | $988 |
| 54 | Adams County | 18.6°F | 5,486 | $1,430 |
| 55 | Sangamon County | 18.6°F | 5,455 | $1,600 |
| 56 | Jersey County | 19.2°F | 5,347 | $1,556 |
| 57 | Macoupin County | 19.2°F | 5,320 | $1,195 |
| 58 | Shelby County | 19.2°F | 5,321 | $1,220 |
| 59 | Christian County | 19.3°F | 5,323 | $1,095 |
| 60 | Clark County | 19.3°F | 5,173 | $1,182 |
| 61 | Vermilion County | 19.5°F | 5,366 | $950 |
| 62 | Calhoun County | 19.7°F | 5,140 | $1,557 |
| 63 | Macon County | 19.7°F | 5,444 | $1,214 |
| 64 | Cass County | 19.9°F | 5,215 | $995 |
| 65 | Crawford County | 20.1°F | 5,170 | $1,095 |
| 66 | De Witt County | 20.1°F | 5,393 | $1,208 |
| 67 | Effingham County | 20.1°F | 5,126 | $1,607 |
| 68 | Coles County | 20.3°F | 5,297 | $1,209 |
| 69 | Cumberland County | 20.3°F | 5,297 | $1,146 |
| 70 | Marion County | 20.8°F | 4,986 | $1,001 |
| 71 | Richland County | 20.8°F | 5,102 | $1,036 |
| 72 | Clay County | 21.2°F | 4,933 | $947 |
| 73 | White County | 21.2°F | 4,857 | $974 |
| 74 | Fayette County | 21.3°F | 5,046 | $1,099 |
| 75 | Lawrence County | 21.3°F | 4,929 | $924 |
| 76 | Washington County | 21.3°F | 4,859 | $1,415 |
| 77 | Montgomery County | 21.4°F | 4,799 | $1,018 |
| 78 | Clinton County | 21.5°F | 4,780 | $1,666 |
| 79 | Randolph County | 21.6°F | 4,833 | $1,238 |
| 80 | Jasper County | 21.7°F | 5,036 | $1,203 |
| 81 | Jefferson County | 21.7°F | 4,998 | $1,147 |
| 82 | Hamilton County | 22.1°F | 4,746 | $1,038 |
| 83 | Hardin County | 22.4°F | 4,803 | $893 |
| 84 | Saline County | 24.0°F | 4,299 | $931 |
| 85 | Monroe County | 24.1°F | 4,547 | $2,321 |
| 86 | Bond County | 24.3°F | 4,209 | $1,292 |
| 87 | Madison County | 24.3°F | 4,209 | $1,573 |
| 88 | St. Clair County | 24.3°F | 4,209 | $1,604 |
| 89 | Edwards County | 24.5°F | 4,398 | $960 |
| 90 | Wayne County | 24.5°F | 4,398 | $1,058 |
| 91 | Franklin County | 24.8°F | 4,460 | $887 |
| 92 | Jackson County | 24.8°F | 4,460 | $1,220 |
| 93 | Perry County | 24.8°F | 4,460 | $1,037 |
| 94 | Williamson County | 24.8°F | 4,460 | $1,364 |
| 95 | Wabash County | 25.0°F | 4,541 | $1,011 |
| 96 | Union County | 25.4°F | 3,977 | $1,220 |
| 97 | Gallatin County | 25.5°F | 4,374 | $863 |
| 98 | Johnson County | 25.5°F | 4,206 | $1,337 |
| 99 | Pope County | 25.5°F | 4,206 | $1,427 |
| 100 | Alexander County | 26.2°F | 4,177 | $667 |
| 101 | Pulaski County | 26.2°F | 4,102 | $789 |
| 102 | Massac County | 27.3°F | 3,925 | $1,123 |
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 Illinois