Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Bac Ha, Vietnam, where the sunny climate can lead to significant UV exposure. With peak values reaching as high as 14 during midday, it’s essential to be aware of the UV levels to prevent sunburn and protect long-term skin health. Bac Ha’s Cwa climate brings distinct seasonal variations, but the risk of harmful UV radiation remains prevalent, particularly during mid to late morning when levels can soar. Being informed not only enhances your outdoor experience but also safeguards your well-being under the Vietnamese sun.
The UV Index today showcases a dramatic rise in solar intensity, starting with a moderate level of 2 at 7:00 AM. As the sun climbs higher in the sky, the intensity peaks at a staggering 14 by noon, marking the most hazardous time for sun exposure. It reaches a maximum of 13 at 1:00 PM, emphasizing the need for protective measures like sunscreen and hats. The afternoon sees a swift decline, dropping to 10 by 2:00 PM and further down to 6 at 3:00 PM. As evening approaches, the UV Index dips to 1 by 5:00 PM, offering some relief, before finally settling at 0 after 7:00 PM. For those planning their day, early morning and late evening provide a safer window for outdoor activities, while midday requires caution to avoid overexposure.
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 2 | low | 45 min |
08:00 | 4 | moderate | 30 min |
09:00 | 7 | high | 25 min |
10:00 | 11 | extreme | 10 min |
11:00 | 13 | extreme | 10 min |
12:00 | 14 | extreme | 10 min |
13:00 | 13 | extreme | 10 min |
14:00 | 10 | very high | 15 min |
15:00 | 6 | high | 25 min |
16:00 | 3 | moderate | 30 min |
17:00 | 1 | low | 45 min |
18:00 | 1 | low | 45 min |
19:00 | 0 | low | 45 min |
During the year, UV levels show distinct seasonal changes, with the highest UV Index typically occurring from March to October. Particularly, May and July peak at a UV Index of 14, categorizing them as extreme, alongside June and August at 13. Residents and visitors should be especially cautious during these months, as the burn time drops to just 10 minutes for unprotected skin. In contrast, January and February also present very high levels with an index of 8 and 10 respectively, maintaining a burn time of 15 minutes. As one moves into the late fall and winter, UV levels decrease; however, November remains a high-risk month with an index of 9. To protect against skin damage, it is crucial to seek shade, wear protective clothing, and apply broad-spectrum sunscreen, particularly during the high-risk months of March to October.
UV Risk Categories
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hanoi UVI | 8 | 10 | 12 | 12 | 13 | 12 | 12 | 13 | 13 | 11 | 9 | 7 |
Haiphong UVI | 8 | 10 | 12 | 13 | 12 | 13 | 13 | 13 | 13 | 11 | 9 | 7 |
Bac Ha | 8 | 10 | 12 | 12 | 14 | 13 | 14 | 13 | 12 | 11 | 9 | 7 |
Da Nang UVI | 10 | 12 | 14 | 15 | 14 | 13 | 14 | 14 | 13 | 12 | 10 | 9 |
Ho Chi Minh City UVI | 10 | 13 | 15 | 14 | 14 | 12 | 13 | 14 | 13 | 13 | 11 | 10 |
Bien Hoa UVI | 10 | 14 | 15 | 15 | 14 | 13 | 14 | 14 | 13 | 12 | 11 | 10 |