At solar noon (12:35:26 PM) the sun reaches 37.6° above the horizon in Chicago. Without clouds, that corresponds to a maximum UV index of about 3.3 (moderate). Clouds usually lower the real value; snow, sand, water and altitude can raise it.
UV index in Chicago, next 14 days
| Date | Sun at noon | Clear-sky max | Forecast max |
|---|---|---|---|
| 37.6° | 3.3 Moderate | — | |
| 37.3° | 3.3 Moderate | — | |
| 36.9° | 3.2 Moderate | — | |
| 36.6° | 3.2 Moderate | — | |
| 36.2° | 3.1 Moderate | — | |
| 35.9° | 3.0 Moderate | — | |
| 35.6° | 3.0 Moderate | — | |
| 35.2° | 2.9 Low | — | |
| 34.9° | 2.9 Low | — | |
| 34.5° | 2.8 Low | — | |
| 34.2° | 2.7 Low | — | |
| 33.9° | 2.7 Low | — | |
| 33.6° | 2.6 Low | — | |
| 33.3° | 2.6 Low | — |
Clear-sky values are calculated from the sun's height at solar noon (cloud-free sky, average ozone). Forecast values from Open-Meteo include clouds and load in your browser.
High UV today? Sport sunscreen with SPF 100 stays on through sweat — essential for long outdoor activities.
View on Amazon →About Chicago
Located in Illinois, Chicago serves as the county seat of Cook County and stands as the largest city in the United States state of Illinois. The municipality has existed since 1837 and occupies an area of 606.4 square kilometers at an elevation of 179 meters. The city’s geography is defined by the Chicago River and its position along Lake Michigan. Notable infrastructure includes O’Hare International Airport and Midway International Airport. Educational institutions such as the University of Chicago and the University of Illinois Chicago operate within its limits. As of 2025, the population is 2,731,585. Twin towns include Kyiv, Vilnius, Lucerne, Accra, and Casablanca.
AI-assisted description based on geographic data and editorial notes.