UV Index in Hamilton, New Zealand

Last updated: June 2, 2025

Understanding the UV Index in Hamilton, New Zealand is essential for safeguarding your skin and overall health. With UV levels peaking in the early afternoon, awareness of these fluctuations can help you prevent sunburn and protect against long-term skin damage. Hamilton's Cfb climate brings a unique combination of sunny days and cooler temperatures, making it easy to overlook UV risks. By staying informed about the UV Index, you can enjoy the outdoors safely while minimizing health risks associated with sun exposure.

Hourly UV Index in Hamilton

The UV Index throughout the day showcases a gradual rise and fall in sunlight intensity. Starting at a maximum of 0 at 07:00, the index remains low as the morning progresses, only reaching 1 by 08:00 and 09:00. As we approach midday, the sun's strength peaks with a UVI of 3 at 12:00 and 13:00, marking the most intense hours for sun exposure. After this brief climax, the index dips back down, winding down to 2 at 14:00, and then steadily declines to 1 by 15:00 before returning to 0 by 17:00, and remaining there through the evening. This data emphasizes the importance of sun protection during the peak hours around noon to early afternoon when the UV exposure is at its highest.

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.
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	0	low	45 min
18:00	0	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Hamilton

The UV Index exhibits significant seasonal variation, with the highest risk months being January, February, November, and December, where the index reaches extreme levels of 14 and burn times are as short as 10 minutes. As the year progresses, the risk decreases to high in March (10) and April (7), and then tapers off to moderate levels in the summer months (June to August) with values ranging from 3 to 5. The cycle then shifts back to high in September and returns to very high in October (10). Residents and visitors are advised to take necessary precautions during the extreme and very high months, such as wearing sunscreen, protective clothing, and seeking shade, especially if spending extended periods outdoors.

Monthly Maximum UV Index for Hamilton, New Zealand

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Hamilton. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Hamilton, based on information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

Compare Hamilton UV Index with Other New Zealand Cities

The table above highlights how UV exposure in Hamilton compares to other major locations across New Zealand. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Hamilton's solar exposure compared to other cities in New Zealand. Generated using Copernicus Atmosphere Monitoring Service information.
	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
Hamilton	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