UV Index in Kolonga, Tonga

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents of Kolonga, Tonga, where sun exposure can significantly impact skin health. Given the region's Af climate, the UV index can reach high levels, peaking at 9 during midday hours. This knowledge is vital for safeguarding against sunburn and long-term skin damage, especially when UV levels are elevated. By being aware of the daily UV fluctuations, you can take proactive measures to enjoy the sun safely and protect your skin during outdoor activities.

Hourly UV Index in Kolonga

Starting your day early, the UV Index remains low, peaking at 1 between 07:00 and 08:00. As the day unfolds, the intensity gradually rises, hitting 2 by 09:00. However, the real surge occurs around 11:00, where the index escalates to 7, and reaches its zenith at 12:00 and 13:00 with a striking 9. This is the time to bask under the sun's rays but remember to stay protected! The afternoon sees a gradual decline, dropping to 5 by 15:00, and tapering off to 2 by 16:00. As the sun sets, the UV exposure diminishes, returning to a safe 1 by 17:00, and finally settling at 0 after 19:00. Plan your outdoor activities accordingly to maximize your enjoyment while staying safe!

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	1	low	45 min
08:00	1	low	45 min
09:00	2	low	45 min
10:00	5	moderate	30 min
11:00	7	high	25 min
12:00	9	very high	15 min
13:00	9	very high	15 min
14:00	7	high	25 min
15:00	5	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Kolonga

The UV Index experiences significant seasonal variation, with the highest levels occurring from January to April, where the index reaches extreme levels (15-16) and a burn time of only 10 minutes. November and December also present extreme UV conditions. May marks a transition to very high levels (UV Index 9), with a burn time extending to 15 minutes, while June to August see a decrease in UV intensity yet maintain very high levels, particularly in July and August. As September through October approach extreme levels again, it’s crucial for residents and visitors to take precautions year-round. Sunscreen, protective clothing, and limited sun exposure during peak hours (10 AM to 4 PM) are highly advised, especially during the high-risk months of January to April and September to November.

Monthly Maximum UV Index for Kolonga, Tonga

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Kolonga. 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 Kolonga, 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 Kolonga UV Index with Other Tonga Cities

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

Kolonga's solar exposure compared to other cities in Tonga. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Kolonga	16	15	14	11	9	7	8	10	11	13	15	16
Tatakamotonga UVI	16	15	14	11	9	7	8	10	11	13	15	16
Haveluloto UVI	16	15	14	11	9	7	8	10	11	13	15	16
Lapaha UVI	16	15	14	11	9	7	8	10	11	13	15	16
Nuku'alofa UVI	16	15	14	11	9	7	8	10	11	13	15	16
Neiafu UVI	16	16	15	12	9	7	8	11	12	14	15	16