UV Index in Half Tree Hollow, Saint Helena, Ascension and Tristan da Cunha
Last updated: April 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 | 1 | 2 | 4 | 7 | 10 | 12 | 11 | 9 | 6 | 3 | 1 | 1 | 0 |
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| Exposure | low | moderate | high | very high | extreme | very high | high | moderate | low |
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| Time to burn | 45 min | 30 min | 25 min | 15 min | 10 min | 15 min | 25 min | 30 min | 45 min |
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UV Index throughout the year in Half Tree Hollow
UV Index (UVI) in Half Tree Hollow. 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 | 1 | 3 | 6 | 9 | 13 | 15 | 15 | 12 | 9 | 5 | 2 | 1 | 0 |
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| February | 1 | 2 | 5 | 9 | 12 | 15 | 15 | 12 | 9 | 5 | 2 | 1 | 0 |
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| March | 1 | 2 | 4 | 8 | 11 | 13 | 13 | 11 | 7 | 4 | 2 | 1 | 0 |
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| April | 1 | 2 | 4 | 7 | 10 | 12 | 11 | 9 | 6 | 3 | 1 | 1 | 0 |
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| May | 1 | 1 | 3 | 6 | 8 | 9 | 9 | 7 | 4 | 2 | 1 | 0 | 0 |
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| June | 1 | 1 | 3 | 5 | 7 | 8 | 7 | 6 | 4 | 2 | 1 | 0 | 0 |
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| July | 1 | 1 | 3 | 5 | 7 | 8 | 8 | 6 | 4 | 2 | 1 | 0 | 0 |
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| August | 1 | 2 | 4 | 6 | 9 | 10 | 10 | 8 | 5 | 3 | 1 | 1 | 0 |
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| September | 1 | 2 | 5 | 8 | 10 | 11 | 11 | 8 | 5 | 3 | 1 | 1 | 0 |
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| October | 1 | 3 | 6 | 10 | 13 | 14 | 13 | 10 | 6 | 3 | 1 | 1 | 0 |
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| November | 1 | 3 | 7 | 10 | 13 | 14 | 13 | 10 | 7 | 4 | 1 | 1 | 0 |
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| December | 1 | 3 | 7 | 10 | 13 | 15 | 14 | 11 | 8 | 4 | 2 | 1 | 0 |
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Compare Half Tree Hollow UV Index to other Saint Helena, Ascension and Tristan da Cunha cities
Half Tree Hollow's solar exposure compared to other cities in Saint Helena, Ascension and Tristan da Cunha. Generated using Copernicus Atmosphere Monitoring Service information.| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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| Edinburgh of the Seven Seas | 14 | 13 | 11 | 7 | 4 | 3 | 3 | 5 | 8 | 10 | 12 | 15 |
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| Half Tree Hollow | 15 | 15 | 13 | 12 | 9 | 8 | 8 | 10 | 11 | 14 | 14 | 15 |
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| Jamestown | 15 | 15 | 13 | 12 | 9 | 8 | 8 | 10 | 11 | 14 | 14 | 15 |
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| Longwood | 15 | 15 | 13 | 12 | 9 | 8 | 8 | 10 | 11 | 14 | 14 | 15 |
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| Georgetown | 14 | 14 | 14 | 13 | 12 | 10 | 10 | 11 | 12 | 13 | 14 | 14 |
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Compare Half Tree Hollow's UV Index to other cities in the world
Half Tree Hollow'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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| 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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| Half Tree Hollow | 15 | 15 | 13 | 12 | 9 | 8 | 8 | 10 | 11 | 14 | 14 | 15 |
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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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