Last updated: July 2, 2025
In Whanganui, New Zealand, being aware of the UV Index is essential for protecting your skin and maintaining overall health. Understanding UV levels is crucial for sunburn prevention and reducing long-term risks like skin cancer. Situated in a Cfb climate zone, Whanganui experiences varying UV exposure throughout the day, with peak levels typically reaching 3 around midday. This makes it vital for residents and visitors alike to stay informed, embrace sun safety practices, and enjoy the beautiful outdoors while safeguarding their skin health.
The UV Index throughout the day tells an intriguing story of sun exposure. Beginning at 7:00 AM, the index stands at a minimal 0, indicating a lower risk of harm from unprotected sun exposure. As the day progresses to 8:00 AM and 9:00 AM, it slightly increases to 1, suggesting that while the sun is on the rise, caution is still not paramount. By 10:00 AM, the index climbs to 2, hinting at moderate sun intensity, which remains consistent until 11:00 AM. The peak index of 3 is reached at 12:00 PM and 1:00 PM, marking the sun's strength at its highest, where protective measures are advised. Following this zenith, a gradual decline begins; the index dips back to 2 at 2:00 PM and slides further down to 1 by mid-afternoon, finally wrapping up the day as it returns to 0 by 6:00 PM. This hourly data highlights the importance of sun safety, especially during midday hours when UV exposure is most intense.
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 0 | low | 45 min |
08:00 | 1 | low | 45 min |
09:00 | 1 | low | 45 min |
10:00 | 2 | low | 45 min |
11:00 | 2 | low | 45 min |
12:00 | 3 | moderate | 30 min |
13:00 | 3 | moderate | 30 min |
14:00 | 2 | low | 45 min |
15:00 | 1 | low | 45 min |
16:00 | 1 | low | 45 min |
17:00 | 1 | low | 45 min |
18:00 | 0 | low | 45 min |
19:00 | 0 | low | 45 min |
Throughout the year, UV Index readings fluctuate significantly, with the highest risks occurring during the extreme exposure categories in January, February, November, and December, when the UV Index reaches 13 and the burn time is as little as 10 minutes. The transition months of March and October indicate very high exposure levels, necessitating careful sun protection with burn times of just 15 minutes. As we move into the warmer months, April and September present high exposure with burn times of 25 minutes. By May, June, and July, the UV Index decreases to moderate levels, offering slightly longer burn times of 30 to 45 minutes. Residents and visitors should be especially cautious during high-risk months, ensuring they apply sunscreen regularly and seek shade when necessary, particularly during peak sunlight hours.
UV Risk Categories
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Christchurch UVI | 13 | 12 | 9 | 6 | 3 | 2 | 2 | 3 | 5 | 9 | 10 | 12 |
Wellington UVI | 13 | 13 | 9 | 7 | 4 | 2 | 2 | 4 | 6 | 9 | 10 | 13 |
Whanganui | 13 | 13 | 9 | 7 | 4 | 2 | 3 | 4 | 6 | 9 | 11 | 13 |
Hamilton UVI | 14 | 14 | 10 | 7 | 4 | 3 | 3 | 5 | 7 | 10 | 11 | 13 |
Manukau City UVI | 14 | 14 | 10 | 7 | 4 | 3 | 3 | 5 | 7 | 10 | 11 | 13 |
Auckland UVI | 14 | 14 | 10 | 7 | 4 | 3 | 3 | 5 | 7 | 10 | 11 | 13 |