UV Index in Los Altos, United States
Last updated: January 2, 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 | 0 | 1 | 1 | 2 | 3 | 3 | 3 | 3 | 2 | 1 | 1 | 0 | 0 |
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| Exposure | Low | Moderate | Low |
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| Time to burn | 45 min | 30 min | 45 min |
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UV Index throughout the year in Los Altos
UV Index (UVI) in Los Altos. 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 | 3 | 2 | 1 | 1 | 0 | 0 |
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| February | 1 | 1 | 2 | 3 | 5 | 5 | 5 | 4 | 3 | 1 | 1 | 0 | 0 |
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| March | 1 | 1 | 2 | 4 | 5 | 7 | 8 | 7 | 6 | 4 | 2 | 1 | 1 |
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| April | 1 | 1 | 3 | 5 | 7 | 8 | 9 | 8 | 7 | 5 | 3 | 1 | 1 |
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| May | 1 | 2 | 4 | 6 | 8 | 10 | 10 | 10 | 8 | 6 | 3 | 2 | 1 |
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| June | 1 | 2 | 4 | 6 | 9 | 11 | 11 | 11 | 9 | 6 | 4 | 2 | 1 |
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| July | 1 | 2 | 4 | 6 | 8 | 10 | 11 | 10 | 9 | 6 | 4 | 2 | 1 |
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| August | 1 | 1 | 3 | 5 | 8 | 9 | 10 | 10 | 8 | 6 | 3 | 2 | 1 |
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| September | 1 | 1 | 2 | 4 | 7 | 8 | 9 | 8 | 6 | 4 | 2 | 1 | 1 |
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| October | 0 | 1 | 2 | 3 | 5 | 6 | 6 | 6 | 4 | 3 | 1 | 1 | 0 |
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| November | 1 | 1 | 2 | 3 | 4 | 4 | 5 | 4 | 3 | 2 | 1 | 0 | 0 |
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| December | 0 | 1 | 1 | 2 | 3 | 3 | 3 | 2 | 1 | 1 | 0 | 0 | 0 |
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Compare Los Altos UV Index to other United States cities
Los Altos'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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| Los Altos | 3 | 5 | 8 | 9 | 10 | 11 | 11 | 10 | 9 | 7 | 5 | 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 Los Altos's UV Index to other cities in the world
Los Altos'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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| Los Altos | 3 | 5 | 8 | 9 | 10 | 11 | 11 | 10 | 9 | 7 | 5 | 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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