Report for Year 2023Data last updated 9/26/2023 00:40 AM.
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Monthly Summary Reports
| Thornton Ultraviolet (UV) Index |
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| Day | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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| 1 | 1.6 | 2.4 | 2.2 | 5.3 | 7.6 | 8.8 | 8.5 | 8.0 | 6.9 | --- | --- | --- |
| 2 | 0.0 | 2.6 | 3.1 | 5.5 | 5.8 | 7.3 | 9.5 | 9.2 | 7.7 | --- | --- | --- |
| 3 | 0.9 | 2.5 | 3.8 | 5.8 | 7.1 | 4.3 | 9.2 | 9.2 | 7.4 | --- | --- | --- |
| 4 | 1.3 | 2.2 | 4.0 | 5.0 | 6.9 | 3.1 | 9.3 | 8.0 | 7.4 | --- | --- | --- |
| 5 | 1.3 | 2.6 | 3.7 | 4.5 | 7.6 | 8.1 | 4.6 | 8.8 | 6.5 | --- | --- | --- |
| 6 | 1.4 | 1.5 | 4.1 | 4.0 | 7.7 | 8.0 | 9.0 | 5.1 | 6.3 | --- | --- | --- |
| 7 | 1.4 | 2.3 | 2.9 | 5.5 | 7.5 | 8.2 | 9.3 | 8.5 | 6.4 | --- | --- | --- |
| 8 | 1.8 | 2.0 | 4.2 | 4.8 | 7.6 | 8.3 | 9.4 | 8.1 | 6.2 | --- | --- | --- |
| 9 | 1.4 | 2.5 | 3.9 | 5.9 | 7.8 | 8.5 | 9.8 | 7.9 | 6.2 | --- | --- | --- |
| 10 | 1.4 | 2.1 | 4.6 | 6.5 | 4.9 | 8.0 | 9.2 | 8.2 | 6.7 | --- | --- | --- |
| 11 | 0.7 | 2.7 | 4.8 | 6.6 | 1.5 | 8.9 | 9.2 | 7.7 | 5.2 | --- | --- | --- |
| 12 | 1.4 | 2.6 | 4.7 | 7.4 | 9.1 | 4.3 | 9.0 | 9.0 | 6.0 | --- | --- | --- |
| 13 | 1.5 | 2.6 | 4.0 | 6.1 | 8.3 | 6.0 | 9.3 | 9.0 | 5.8 | --- | --- | --- |
| 14 | 1.2 | 2.5 | 4.4 | 1.2 | 9.2 | 7.3 | 9.5 | 7.5 | 6.2 | --- | --- | --- |
| 15 | 1.3 | 0.6 | 3.9 | 6.0 | 10.0 | 7.8 | 8.2 | 7.6 | 3.9 | --- | --- | --- |
| 16 | 1.4 | 2.2 | 4.1 | 7.1 | 10.0 | 7.5 | 8.8 | 7.9 | 5.7 | --- | --- | --- |
| 17 | 1.3 | 3.4 | 4.3 | 6.6 | 8.7 | 7.8 | 9.2 | 7.3 | 5.6 | --- | --- | --- |
| 18 | 1.2 | 2.3 | 4.4 | 5.4 | 8.1 | 9.3 | 9.2 | 7.4 | 5.7 | --- | --- | --- |
| 19 | 1.6 | 2.7 | 4.6 | 4.4 | 2.9 | 8.8 | 9.7 | 7.3 | 5.9 | --- | --- | --- |
| 20 | 1.7 | 2.2 | 4.5 | 5.4 | 7.7 | 9.4 | 9.6 | 7.9 | 5.2 | --- | --- | --- |
| 21 | 1.5 | 3.5 | 4.8 | 5.0 | 8.1 | 9.6 | 8.3 | 7.6 | 5.3 | --- | --- | --- |
| 22 | 2.0 | 1.9 | 6.2 | 4.0 | 4.8 | 9.8 | 8.5 | 6.8 | 5.1 | --- | --- | --- |
| 23 | 2.0 | 1.5 | 3.8 | 6.2 | 6.1 | 9.0 | 8.5 | 6.9 | 5.1 | --- | --- | --- |
| 24 | 1.8 | 3.8 | 3.9 | 6.1 | 4.9 | 9.6 | 8.1 | 7.3 | 5.1 | --- | --- | --- |
| 25 | 1.7 | 3.6 | 4.7 | 6.9 | 8.1 | 9.5 | 8.3 | 2.3 | 5.3 | --- | --- | --- |
| 26 | 1.9 | 2.9 | 4.2 | 7.6 | 8.3 | 9.6 | 9.0 | 8.5 | 0.0 | --- | --- | --- |
| 27 | 1.5 | 4.0 | 3.2 | 5.8 | 8.1 | 9.5 | 9.2 | 8.5 | --- | --- | --- | --- |
| 28 | 2.0 | 3.6 | 5.0 | 7.0 | 8.7 | 9.2 | 9.7 | 7.8 | --- | --- | --- | --- |
| 29 | 1.4 | | 5.3 | 8.3 | 8.5 | 9.0 | 8.4 | 7.2 | --- | --- | --- | --- |
| 30 | 2.1 | | 4.4 | 8.1 | 7.9 | 8.3 | 8.4 | 7.3 | --- | --- | --- | --- |
| 31 | 2.5 | | 4.7 | | 8.4 | | 7.9 | 6.9 | | --- | | --- |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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| Highest High | 2.5 | 4.0 | 6.2 | 8.3 | 10.0 | 9.8 | 9.8 | 9.2 | 7.7 | --- | --- | --- |
| Average High | 1.5 | 2.5 | 4.2 | 5.8 | 7.3 | 8.1 | 8.8 | 7.6 | 5.7 | --- | --- | --- |
| Lowest High | 0.0 | 0.6 | 2.2 | 1.2 | 1.5 | 3.1 | 4.6 | 2.3 | 0.0 | --- | --- | --- |
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| UV Level |
UV Index |
Description |
| Low | 0-2 | No danger to the average person. |
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| Moderate | 3-5 | Little risk of harm from unprotected sun exposure. |
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| High | 6-7 | High risk of harm from unprotected sun exposure. |
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| Very High | 8-10 | Very high risk of harm from unprotected sun exposure. |
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| Extreme | 11+ | Extreme risk of harm from unprotected sun exposure. |
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