| Weather Source |
Get historical monthly weather data - totals, means and extremes - for over 18,000+ current and former United States weather stations for every year that each station reported. Columns are sortable so you can get a sense of what the range of possibilities are for each metric. Select a city where you want to learn about past weather. Columns include highest temperature, lowest temperature, mean temperature, total precipitation, total snowfall and many more.
Please select a city in IL| City | Station Name | County |
| Lacon | Lacon 1 N | Marshall |
| Lacon | Lacon Marshall Cnty Arpt | Marshall |
| La Fayette | Toulon 2 Ssw | Stark |
| La Grange | Lagrange | Cook |
| La Harpe | La Harpe | Hancock |
| Lake Villa | Lake Villa 2 Ne | Lake |
| Lanark | Lanark | Carroll |
| Lansing | Chicago Lansing Muni Arpt | Cook |
| Lansing | Lansing | Cook |
| La Prairie | Golden | Adams |
| Lawrenceville | Lawrenceville | Lawrence |
| Lawrenceville | Lawrenceville Vincennes Intl Arpt | Lawrence |
| Lebanon | Lebanon | Saint Clair |
| Le Roy | Le Roy | McLean |
| Lewistown | Lewistown | Fulton |
| Lexington | Lexington | McLean |
| Libertyville | Libertyville 4 Nnw | Lake |
| Lincoln | Lincoln 2 | Logan |
| Lincoln | Lincoln Logan Cnty Arpt | Logan |
| Lincoln | Lincoln | Logan |
| Lincoln's New Salem | Petersburg 2Sw | Menard |
| Lincoln's New Salem | Petersburg 3 Ssw | Menard |
| Lincoln's New Salem | Petersburg 3 Ssw | Menard |
| Lincolnwood | Skokie N S Treat Wks | Cook |
| Lindenwood | Lindenwood | Ogle |
| Lisle | Wheaton 3 Se | Du Page |
| Litchfield | Litchfield | Montgomery |
| Loami | Loami 3 Ssw | Sangamon |
| Loami | Loami | Sangamon |
| Loami | Waverly | Sangamon |
| Louisville | Louisville 4 N | Clay |
| Louisville | Louisville | Clay |
| Lovington | Lovington | Moultrie |
| Lyndon | Prophetstown | Whiteside |