UV Index in Saint Charles, United States
Last updated: March 1, 2025
Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.| | 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 |
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| UVI | 1 | 1 | 2 | 4 | 5 | 6 | 6 | 6 | 5 | 3 | 2 | 1 | 1 |
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| Exposure | low | moderate | high | moderate | low |
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| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min |
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UV Index throughout the year in Saint Charles
UV Index (UVI) in Saint Charles. Generated using Copernicus Atmosphere Monitoring Service information. Data for the period from January 2022 to January 2023.| | 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 |
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| January | 0 | 1 | 1 | 2 | 3 | 3 | 3 | 2 | 1 | 1 | 1 | 0 | 0 |
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| February | 1 | 1 | 2 | 3 | 5 | 5 | 5 | 4 | 2 | 1 | 1 | 0 | 0 |
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| March | 1 | 1 | 2 | 4 | 5 | 6 | 6 | 6 | 5 | 3 | 2 | 1 | 1 |
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| April | 1 | 1 | 3 | 5 | 7 | 9 | 9 | 8 | 7 | 4 | 2 | 1 | 1 |
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| May | 1 | 2 | 4 | 6 | 8 | 10 | 10 | 9 | 8 | 5 | 3 | 2 | 1 |
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| June | 1 | 2 | 4 | 6 | 9 | 10 | 11 | 10 | 8 | 6 | 4 | 2 | 1 |
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| July | 1 | 2 | 4 | 6 | 8 | 10 | 10 | 10 | 8 | 6 | 3 | 2 | 1 |
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| August | 1 | 2 | 3 | 5 | 7 | 9 | 9 | 9 | 7 | 5 | 3 | 1 | 1 |
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| September | 1 | 1 | 2 | 4 | 6 | 8 | 8 | 8 | 6 | 4 | 2 | 1 | 1 |
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| October | 1 | 1 | 2 | 3 | 5 | 6 | 6 | 6 | 4 | 2 | 1 | 1 | 0 |
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| November | 1 | 1 | 2 | 3 | 4 | 4 | 4 | 4 | 3 | 1 | 1 | 0 | 0 |
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| December | 1 | 1 | 1 | 2 | 3 | 3 | 2 | 2 | 1 | 1 | 0 | 0 | 0 |
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Compare Saint Charles UV Index to other United States cities
Saint Charles's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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| Chicago | 3 | 4 | 6 | 8 | 9 | 10 | 10 | 9 | 8 | 6 | 4 | 2 |
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| Brooklyn | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
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| New York City | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
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| Saint Charles | 3 | 5 | 6 | 9 | 10 | 11 | 10 | 10 | 9 | 6 | 4 | 3 |
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| Los Angeles | 4 | 6 | 8 | 9 | 10 | 11 | 11 | 10 | 10 | 7 | 5 | 4 |
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| Houston | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |
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Compare Saint Charles's UV Index to other cities in the world
Saint Charles's solar exposure compared to other cities in the world. Generated using Copernicus Atmosphere Monitoring Service information.| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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| Oslo | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
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| Berlin | 1 | 2 | 4 | 5 | 7 | 8 | 7 | 7 | 5 | 3 | 2 | 1 |
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| London | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 1 |
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| Toronto | 2 | 4 | 5 | 8 | 9 | 9 | 9 | 9 | 7 | 5 | 3 | 2 |
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| New York City | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
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| Athens | 3 | 4 | 6 | 8 | 10 | 10 | 10 | 10 | 8 | 7 | 4 | 3 |
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| Saint Charles | 3 | 5 | 6 | 9 | 10 | 11 | 10 | 10 | 9 | 6 | 4 | 3 |
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| Tokyo | 3 | 5 | 8 | 9 | 11 | 11 | 11 | 11 | 10 | 7 | 5 | 4 |
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| Los Angeles | 4 | 6 | 8 | 9 | 10 | 11 | 11 | 10 | 10 | 7 | 5 | 4 |
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| Shanghai | 5 | 6 | 8 | 10 | 10 | 11 | 12 | 11 | 11 | 8 | 6 | 4 |
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| Auckland | 14 | 14 | 10 | 7 | 4 | 3 | 3 | 5 | 7 | 10 | 11 | 13 |
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| Dubai | 6 | 7 | 11 | 11 | 12 | 11 | 10 | 11 | 10 | 8 | 6 | 5 |
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| Sydney | 14 | 13 | 11 | 8 | 5 | 3 | 4 | 6 | 8 | 10 | 12 | 14 |
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| Miami | 6 | 9 | 10 | 12 | 12 | 13 | 12 | 12 | 11 | 10 | 8 | 6 |
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| Mexico City | 10 | 12 | 14 | 15 | 15 | 14 | 14 | 13 | 14 | 12 | 10 | 8 |
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| Jakarta | 14 | 16 | 16 | 14 | 11 | 10 | 10 | 11 | 13 | 15 | 14 | 13 |
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