Frost Dates & Planting Calendars in Illinois
Typical last spring frost, first fall frost, and growing-season length for 285 cities in Illinois, based on NOAA 1991–2020 climate normals. Click a city for its full frost-date summary, monthly temperature chart, and 42-crop planting calendar.
| City | Last Spring Frost (typical) | First Fall Frost (typical) | Growing Season | USDA Zone |
|---|---|---|---|---|
| Chicago | April 10 | November 5 | 208 days | 6b |
| Aurora | April 19 | October 23 | 185 days | 5b |
| Rockford | April 24 | October 17 | 174 days | 5b |
| Joliet | April 19 | October 25 | 188 days | 6a |
| Naperville | April 28 | October 16 | 169 days | 5b |
| Peoria | April 16 | October 23 | 189 days | 6a |
| Springfield | April 15 | October 22 | 188 days | 6a |
| North Peoria | April 16 | October 23 | 189 days | 6a |
| Elgin | April 26 | October 18 | 174 days | 5b |
| Waukegan | April 30 | October 19 | 170 days | 6a |
| West Town | April 10 | November 5 | 208 days | 6a |
| Champaign | April 15 | October 24 | 190 days | 6a |
| Near North Side | April 10 | November 5 | 208 days | 6b |
| Cicero | April 11 | October 31 | 201 days | 6a |
| Belmont Cragin | April 16 | October 28 | 193 days | 6a |
| Bloomington | April 21 | October 20 | 181 days | 6a |
| Arlington Heights | April 19 | October 26 | 190 days | 6a |
| Evanston | April 26 | October 21 | 176 days | 6a |
| Schaumburg | April 30 | October 13 | 163 days | 5b |
| Bolingbrook | April 20 | October 22 | 184 days | 6a |
| South Lawndale | April 11 | October 31 | 201 days | 6a |
| Logan Square | April 10 | November 5 | 208 days | 6a |
| Decatur | April 14 | October 24 | 192 days | 6a |
| West Ridge | April 26 | October 21 | 176 days | 6a |
| Palatine | April 25 | October 19 | 177 days | 5b |
| Lincoln Park | April 10 | November 5 | 208 days | 6b |
| Portage Park | April 16 | October 28 | 193 days | 6a |
| Skokie | April 26 | October 21 | 176 days | 6a |
| Des Plaines | April 16 | October 28 | 193 days | 6a |
| Orland Park | April 19 | October 22 | 183 days | 6a |
| Tinley Park | April 23 | October 20 | 179 days | 6a |
| Oak Lawn | April 10 | November 1 | 203 days | 6a |
| Irving Park | April 10 | November 5 | 208 days | 6a |
| Berwyn | April 11 | October 31 | 201 days | 6a |
| Chicago Lawn | April 11 | October 31 | 201 days | 6a |
| Uptown | April 10 | November 5 | 208 days | 6a |
| Edgewater | April 10 | November 5 | 208 days | 6a |
| Mount Prospect | April 19 | October 26 | 190 days | 6a |
| Rogers Park | April 26 | October 21 | 176 days | 6a |
| Normal | April 25 | October 16 | 172 days | 6a |
| Wheaton | April 28 | October 16 | 169 days | 5b |
| Oak Park | April 11 | October 31 | 201 days | 6a |
| Hoffman Estates | April 30 | October 13 | 163 days | 5b |
| Albany Park | April 10 | November 5 | 208 days | 6a |
| South Shore | April 10 | November 5 | 208 days | 6b |
| Downers Grove | April 28 | October 16 | 169 days | 6a |
| Glenview | April 26 | October 21 | 176 days | 6a |
| Elmhurst | April 16 | October 28 | 193 days | 6a |
| Auburn Gresham | April 11 | October 31 | 201 days | 6a |
| Brighton Park | April 11 | October 31 | 201 days | 6a |
| Lombard | April 28 | October 16 | 169 days | 6a |
| DeKalb | April 24 | October 18 | 177 days | 5b |
| Ashburn | April 11 | October 31 | 201 days | 6a |
| Moline | April 19 | October 22 | 184 days | 5b |
| Plainfield | April 20 | October 22 | 184 days | 5b |
| Urbana | April 15 | October 24 | 190 days | 6a |
| Belleville | April 12 | October 20 | 189 days | 7a |
| Bartlett | April 30 | October 13 | 163 days | 5b |
| Buffalo Grove | April 19 | October 26 | 190 days | 6a |
| Gage Park | April 11 | October 31 | 201 days | 6a |
| New City | April 10 | November 5 | 208 days | 6a |
| Quincy | April 8 | October 30 | 204 days | 6a |
| Lincoln Square | April 10 | November 5 | 208 days | 6a |
| Streamwood | April 30 | October 13 | 163 days | 5b |
| Crystal Lake | April 25 | October 22 | 179 days | 5b |
| Carol Stream | April 25 | October 19 | 174 days | 5b |
| Avondale | April 10 | November 5 | 208 days | 6a |
| Romeoville | April 20 | October 22 | 184 days | 6a |
| Rock Island | April 19 | October 22 | 184 days | 5b |
| Carpentersville | April 26 | October 18 | 174 days | 5b |
| Hanover Park | April 30 | October 13 | 163 days | 5b |
| Wheeling | April 19 | October 26 | 190 days | 6a |
| Park Ridge | April 16 | October 28 | 193 days | 6a |
| Addison | April 16 | October 28 | 193 days | 6a |
| Calumet City | April 23 | October 20 | 179 days | 6a |
| North Lawndale | April 11 | October 31 | 201 days | 6a |
| North Center | April 10 | November 5 | 208 days | 6b |
| Lower West Side | April 10 | November 5 | 208 days | 6a |
| Glendale Heights | April 28 | October 16 | 169 days | 5b |
| Oswego | April 19 | October 23 | 185 days | 5b |
| Bridgeport | April 10 | November 5 | 208 days | 6b |
| Northbrook | April 26 | October 21 | 176 days | 6a |
| Chicago Loop | April 10 | November 5 | 208 days | 6a |
| Woodridge | April 28 | October 16 | 169 days | 6a |
| Elk Grove Village | April 16 | October 28 | 193 days | 6a |
| Pekin | April 16 | October 23 | 189 days | 6a |
| St. Charles | April 25 | October 19 | 174 days | 5b |
| West Lawn | April 11 | October 31 | 201 days | 6a |
| Greater Grand Crossing | April 10 | November 5 | 208 days | 6a |
| West Englewood | April 11 | October 31 | 201 days | 6a |
| Danville | April 21 | October 20 | 181 days | 6a |
| Mundelein | April 29 | October 20 | 172 days | 5b |
| Chatham | April 11 | October 31 | 201 days | 6a |
| Galesburg | April 20 | October 19 | 180 days | 5b |
| Gurnee | April 30 | October 19 | 170 days | 6a |
| Algonquin | April 26 | October 18 | 174 days | 5b |
| Chicago Heights | April 23 | October 20 | 179 days | 6a |
| Niles | April 16 | October 28 | 193 days | 6a |
| Highland Park | April 26 | October 21 | 176 days | 6a |
| North Chicago | April 30 | October 19 | 170 days | 6a |
| Upper Alton | April 4 | November 5 | 214 days | 7a |
| Burbank | April 10 | November 1 | 203 days | 6a |
| Granite City | April 1 | November 4 | 218 days | 7a |
| Lake in the Hills | April 25 | October 22 | 179 days | 5b |
| O'Fallon | April 12 | October 20 | 189 days | 7a |
| Lansing | April 23 | October 20 | 179 days | 6a |
| Glen Ellyn | April 28 | October 16 | 169 days | 5b |
| South Chicago | April 10 | November 5 | 208 days | 6a |
| Oak Forest | April 23 | October 20 | 179 days | 6a |
| Round Lake Beach | April 24 | October 23 | 180 days | 5b |
| West Chicago | April 25 | October 19 | 174 days | 5b |
| Wilmette | April 26 | October 21 | 176 days | 6a |
| East Saint Louis | April 8 | October 26 | 200 days | 7a |
| Alton | April 4 | November 5 | 214 days | 7a |
| Hyde Park | April 10 | November 5 | 208 days | 6b |
| Kankakee | April 19 | October 24 | 188 days | 5b |
| McHenry | May 1 | October 11 | 162 days | 5b |
| Batavia | April 19 | October 23 | 185 days | 5b |
| Carbondale | April 9 | October 22 | 195 days | 7a |
| Vernon Hills | April 29 | October 20 | 172 days | 6a |
| Englewood | April 11 | October 31 | 201 days | 6a |
| Huntley | April 25 | October 22 | 179 days | 5b |
| New Lenox | April 19 | October 25 | 188 days | 6a |
| Melrose Park | April 16 | October 28 | 193 days | 6a |
| Harvey | April 23 | October 20 | 179 days | 6a |
| Woodstock | April 25 | October 22 | 179 days | 5b |
| Lockport | April 20 | October 22 | 184 days | 6a |
| Belvidere | April 28 | October 12 | 166 days | 5b |
| Edwardsville | April 4 | November 5 | 214 days | 7a |
| Westmont | April 28 | October 16 | 169 days | 6a |
| Elmwood Park | April 16 | October 28 | 193 days | 6a |
| Collinsville | April 8 | October 26 | 200 days | 7a |
| Freeport | April 26 | October 13 | 169 days | 5a |
| Homer Glen | April 20 | October 22 | 184 days | 6a |
| Rolling Meadows | April 19 | October 26 | 190 days | 6a |
| Woodlawn | April 10 | November 5 | 208 days | 6a |
| Zion | April 30 | October 21 | 173 days | 6a |
| Maywood | April 11 | October 31 | 201 days | 6a |
| Blue Island | April 10 | November 1 | 203 days | 6a |
| Loves Park | April 24 | October 17 | 174 days | 5b |
| Morton Grove | April 26 | October 21 | 176 days | 6a |
| Dolton | April 23 | October 20 | 179 days | 6a |
| East Peoria | April 16 | October 23 | 189 days | 6a |
| Roselle | April 30 | October 13 | 163 days | 5b |
| Lisle | April 28 | October 16 | 169 days | 5b |
| Machesney Park | May 1 | October 12 | 162 days | 5b |
| Morgan Park | April 10 | November 1 | 203 days | 6a |
| Wasco | April 25 | October 19 | 174 days | 5b |
| Near South Side | April 10 | November 5 | 208 days | 6b |
| Grand Boulevard | April 10 | November 5 | 208 days | 6b |
| South Elgin | April 26 | October 18 | 174 days | 5b |
| Darien | April 19 | October 22 | 183 days | 6a |
| Bloomingdale | April 30 | October 13 | 163 days | 5b |
| South Holland | April 23 | October 20 | 179 days | 6a |
| Villa Park | April 28 | October 16 | 169 days | 6a |
| Park Forest | April 23 | October 20 | 179 days | 6a |
| Geneva | April 25 | October 19 | 174 days | 5b |
| East Moline | April 24 | October 18 | 176 days | 5b |
| Charleston | April 15 | October 23 | 187 days | 6a |
| Crest Hill | April 20 | October 22 | 184 days | 6a |
| Grayslake | April 24 | October 23 | 180 days | 5b |
| East Garfield Park | April 10 | November 5 | 208 days | 6a |
| Libertyville | April 30 | October 19 | 170 days | 6a |
| Douglas | April 10 | November 5 | 208 days | 6b |
| Lake Zurich | April 29 | October 20 | 172 days | 5b |
| Mokena | April 23 | October 20 | 179 days | 6a |
| Evergreen Park | April 10 | November 1 | 203 days | 6a |
| Montgomery | April 19 | October 23 | 185 days | 5b |
| Lake Forest | April 30 | October 19 | 170 days | 6a |
| Homewood | April 23 | October 20 | 179 days | 6a |
| Alsip | April 10 | November 1 | 203 days | 6a |
| Bellwood | April 16 | October 28 | 193 days | 6a |
| West Elsdon | April 11 | October 31 | 201 days | 6a |
| Matteson | April 23 | October 20 | 179 days | 6a |
| Jacksonville | April 17 | October 21 | 186 days | 6a |
| Deerfield | April 26 | October 21 | 176 days | 6a |
| Brookfield | April 11 | October 31 | 201 days | 6a |
| Mount Greenwood | April 10 | November 1 | 203 days | 6a |
| Frankfort | April 23 | October 20 | 179 days | 6a |
| Bourbonnais | April 19 | October 24 | 188 days | 5b |
| Goodings Grove | April 19 | October 22 | 183 days | 6a |
| Macomb | April 17 | October 22 | 185 days | 6a |
| Round Lake | April 24 | October 23 | 180 days | 5b |
| Yorkville | April 28 | October 13 | 166 days | 5b |
| Bensenville | April 16 | October 28 | 193 days | 6a |
| Ottawa | April 20 | October 22 | 183 days | 5b |
| Franklin Park | April 16 | October 28 | 193 days | 6a |
| Mattoon | April 11 | October 29 | 199 days | 6a |
| Cary | May 1 | October 11 | 162 days | 5b |
| Marion | April 9 | October 22 | 195 days | 7a |
| Godfrey | April 4 | November 5 | 214 days | 6b |
| West Garfield Park | April 10 | November 5 | 208 days | 6a |
| Sycamore | April 24 | October 18 | 177 days | 5b |
| Hinsdale | April 28 | October 16 | 169 days | 6a |
| Kenwood | April 10 | November 5 | 208 days | 6b |
| Palos Hills | April 19 | October 22 | 183 days | 6a |
| North Aurora | April 19 | October 23 | 185 days | 5b |
| Fairview Heights | April 8 | October 26 | 200 days | 7a |
| Country Club Hills | April 23 | October 20 | 179 days | 6a |
| Lemont | April 20 | October 22 | 184 days | 6a |
| Shorewood | April 19 | October 25 | 188 days | 5b |
| Westchester | April 11 | October 31 | 201 days | 6a |
| Washington | April 21 | October 17 | 178 days | 6a |
| Bridgeview | April 10 | November 1 | 203 days | 6a |
| Prospect Heights | April 19 | October 26 | 190 days | 6a |
| Morton | April 21 | October 17 | 178 days | 6a |
| La Grange | April 11 | October 31 | 201 days | 6a |
| Bradley | April 19 | October 24 | 188 days | 5b |
| McKinley Park | April 10 | November 5 | 208 days | 6a |
| Dixon | April 21 | October 19 | 180 days | 5b |
| Mount Vernon | April 11 | October 22 | 193 days | 6b |
| Sterling | April 21 | October 19 | 180 days | 5b |
| Ukrainian Village | April 10 | November 5 | 208 days | 6a |
| Midlothian | April 10 | November 1 | 203 days | 6a |
| Norridge | April 16 | October 28 | 193 days | 6a |
| Lindenhurst | April 24 | October 23 | 180 days | 5b |
| Cahokia | April 6 | October 27 | 203 days | 7a |
| Chicago Ridge | April 10 | November 1 | 203 days | 6a |
| Morris | April 20 | October 23 | 184 days | 5b |
| Antioch | April 23 | October 21 | 179 days | 5b |
| Canton | April 17 | October 19 | 185 days | 6a |
| Forest Park | April 11 | October 31 | 201 days | 6a |
| Hickory Hills | April 10 | November 1 | 203 days | 6a |
| Hazel Crest | April 23 | October 20 | 179 days | 6a |
| Beach Park | April 30 | October 21 | 173 days | 6a |
| Lincoln | April 20 | October 16 | 179 days | 6a |
| Wood Dale | April 16 | October 28 | 193 days | 6a |
| Wauconda | April 29 | October 20 | 172 days | 5b |
| Richton Park | April 23 | October 20 | 179 days | 6a |
| La Grange Park | April 11 | October 31 | 201 days | 6a |
| Swansea | April 12 | October 20 | 189 days | 7a |
| Riverdale | April 23 | October 20 | 179 days | 6a |
| Village of Campton Hills | April 25 | October 19 | 174 days | 5b |
| Western Springs | April 19 | October 22 | 183 days | 6a |
| Warrenville | April 28 | October 16 | 169 days | 5b |
| Streator | April 12 | October 28 | 199 days | 5b |
| Rantoul | April 21 | October 18 | 179 days | 6a |
| Justice | April 19 | October 22 | 183 days | 6a |
| Glen Carbon | April 4 | November 5 | 214 days | 7a |
| Shiloh | April 12 | October 20 | 189 days | 7a |
| Herrin | April 9 | October 22 | 195 days | 7a |
| Markham | April 23 | October 20 | 179 days | 6a |
| Centralia | April 9 | October 24 | 196 days | 6b |
| Lincolnwood | April 26 | October 21 | 176 days | 6a |
| Effingham | April 13 | October 24 | 191 days | 6b |
| Channahon | April 16 | October 26 | 191 days | 5b |
| Palos Heights | April 10 | November 1 | 203 days | 6a |
| Kewanee | April 24 | October 17 | 175 days | 5b |
| Winnetka | April 26 | October 21 | 176 days | 6a |
| Chatham | April 15 | October 22 | 188 days | 6a |
| Northlake | April 16 | October 28 | 193 days | 6a |
| Schiller Park | April 16 | October 28 | 193 days | 6a |
| Pontiac | April 16 | October 24 | 191 days | 6a |
| Summit | April 11 | October 31 | 201 days | 6a |
| Plano | April 28 | October 13 | 166 days | 5b |
| Minooka | April 16 | October 26 | 191 days | 5b |
| River Forest | April 11 | October 31 | 201 days | 6a |
| Crestwood | April 10 | November 1 | 203 days | 6a |
| Taylorville | April 12 | October 20 | 190 days | 6a |
| Burr Ridge | April 19 | October 22 | 183 days | 6a |
| Worth | April 10 | November 1 | 203 days | 6a |
| Lyons | April 11 | October 31 | 201 days | 6a |
| Roscoe | May 1 | October 12 | 162 days | 5b |
| Fox Lake | April 24 | October 23 | 180 days | 5b |
| Sauk Village | April 23 | October 20 | 179 days | 6a |
| Barrington | April 25 | October 19 | 177 days | 5b |
| Wood River | April 4 | November 5 | 214 days | 7a |
| Waterloo | April 9 | October 26 | 197 days | 7a |
| River Grove | April 16 | October 28 | 193 days | 6a |
| Gages Lake | April 30 | October 19 | 170 days | 5b |
| Columbia | April 6 | October 27 | 203 days | 7a |
| Troy | April 12 | October 20 | 189 days | 7a |
| Peru | April 24 | October 18 | 176 days | 5b |
| Highland | April 12 | October 20 | 189 days | 6b |
| Winfield | April 28 | October 16 | 169 days | 5b |
| La Salle | April 24 | October 18 | 176 days | 5b |
| Steger | April 23 | October 20 | 179 days | 6a |
| Sugar Grove | April 28 | October 13 | 166 days | 5b |
| Flossmoor | April 23 | October 20 | 179 days | 6a |
| Bethalto | April 4 | November 5 | 214 days | 6b |
| Rochelle | April 26 | October 13 | 168 days | 5b |
| Monmouth | April 22 | October 15 | 174 days | 5b |
| Lynwood | April 23 | October 20 | 179 days | 6a |
| Frankfort Square | April 23 | October 20 | 179 days | 6a |
| Harvard | April 28 | October 12 | 166 days | 5b |