Chicago is the #1 ranked city in Illinois with 185 days (sunny days/yr). This ranking includes 1 Illinois cities with available data.
| # | City | Population | Sunny Days/Yr |
|---|---|---|---|
| 1 | Chicago | 2,707,648 | 185 days |
Cities in Illinois are ranked by sunny days/yr. Only cities with populations above 1,000 are included. Data sourced from NOAA. Last updated 2026.