| # | City | Average annual precipitation |
|---|---|---|
| 1 | Carbondale | 49.0 in |
| 2 | Marion | 49.0 in |
| 3 | Granite City | 43.9 in |
| 4 | Charleston | 43.8 in |
| 5 | Belleville | 43.4 in |
| 6 | O'Fallon | 43.4 in |
| 7 | Danville | 43.2 in |
| 8 | Calumet City | 42.1 in |
| 9 | Tinley Park | 42.1 in |
| 10 | Alton | 41.9 in |
| 11 | Edwardsville | 41.9 in |
| 12 | Kankakee | 41.7 in |
| 13 | Orland Park | 41.4 in |
| 14 | Mattoon | 41.3 in |
| 15 | Bolingbrook | 41.1 in |
| 16 | Plainfield | 41.1 in |
| 17 | Romeoville | 41.1 in |
| 18 | Champaign | 40.9 in |
| 19 | Champaign-Urbana | 40.9 in |
| 20 | Oak Lawn | 40.9 in |
| 21 | Urbana | 40.9 in |
| 22 | Collinsville | 40.8 in |
| 23 | East St. Louis | 40.8 in |
| 24 | Sterling | 40.5 in |
| 25 | Bloomington | 40.4 in |
Source: NOAA NCEI 1991-2020 U.S. Climate Normals, nearest station with complete data. Only cities covered by GIS Map with at least 1,000 residents are ranked. Estimates carry margins of error.
Citing this page: GIS Map, “Wettest Cities in Illinois”, https://gismap.land/rankings/illinois/wettest-cities. Figures from NOAA NCEI 1991-2020 U.S. Climate Normals, nearest station with complete data.
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