UV Index in Ofu, American Samoa

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of Ofu, American Samoa, where the sun’s rays can be intense even during certain parts of the day. With a tropical climate characterized by consistent warmth and humidity, the UV levels can rise dramatically, peaking at a significant 11 around noon. This highlights the importance of being aware of UV levels for preventing sunburn and maintaining skin health. As exposure increases, so does the risk of skin damage, making it essential to check the UV Index regularly to protect yourself and enjoy the beautiful surroundings safely.

Hourly UV Index in Ofu

As the day unfolds, the UV Index reaches its peak between 11:00 AM and 12:00 PM, soaring to a striking 11. The morning starts gently, with the index at a modest 1 by 7:00 AM, slowly climbing to 4 by 9:00 AM. The sun then intensifies, pushing the index to a strong 10 at 11:00 AM, signaling it's time to seek shade and protect your skin. By 2:00 PM, it begins to wane, dropping to 8, and further decreases to 5 by 3:00 PM. As the afternoon progresses, the index continues to fall, reaching 2 at 4:00 PM, and finally settling at 1 by 5:00 PM and 0 as the sun sets at 6:00 PM. Stay aware and shield yourself during those crucial midday hours!

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	2	low	45 min
09:00	4	moderate	30 min
10:00	7	high	25 min
11:00	10	very high	15 min
12:00	11	extreme	10 min
13:00	10	very high	15 min
14:00	8	very high	15 min
15:00	5	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	0	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Ofu

The UV Index shows significant variations throughout the year, with extreme exposure levels primarily in the winter and early spring months. From January to May, the UV Index consistently ranges from 11 to 16, indicating high-risk months, particularly during January to April when burn time is just 10 minutes. In June and July, the Index lowers to 9, categorized as very high, allowing for a slightly longer burn time of 15 minutes. However, levels rise again in August, September, and October, all falling within the extreme category, with burn times reverting to 10 minutes. To ensure safety, residents and visitors alike are advised to limit sun exposure during these high-risk months, seek shade, wear protective clothing, and apply sunscreen consistently when outdoors.

Monthly Maximum UV Index for Ofu, American Samoa

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

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

Ofu's solar exposure compared to other cities in American Samoa. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Ofu	16	16	15	13	11	9	9	12	14	15	15	15
Aua UVI	16	16	15	13	11	9	9	12	14	15	15	15
Faleniu UVI	16	16	15	13	11	9	9	12	14	15	15	15
Leone UVI	16	16	15	13	11	9	9	12	14	15	15	15
Tafuna UVI	16	16	15	13	11	9	9	12	14	15	15	15
Pago Pago UVI	16	16	15	13	11	9	9	12	14	15	15	15