UV Index in Williamstown, Australia

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors in Williamstown, Australia, where the climate can expose individuals to varying levels of ultraviolet radiation throughout the day. With peak UV Index readings reaching 5 during midday hours, being aware of the UV levels is essential for sunburn prevention and maintaining skin health. Williamstown’s Csb climate brings mild summers but can produce significant UV exposure risks, making it vital to check the UV Index regularly to protect yourself and enjoy the outdoors safely.

Hourly UV Index in Williamstown

As the day begins, the UV Index starts off low, peaking at 1 from 7:00 AM to 8:00 AM. However, by 9:00 AM, it climbs to 3, indicating a moderate increase in UV exposure. The real intensity is felt around 11:00 AM and 12:00 PM, where the index reaches its maximum of 5, suggesting a need for sun protection during these hours. As the afternoon progresses, the UV Index begins to decline, dropping to 2 by 3:00 PM and tapering off to 0 by 5:00 PM onwards, signaling a safe period to enjoy outdoor activities without concern for UV rays. Stay vigilant during the peak hours to keep your skin protected!

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	3	moderate	30 min
10:00	4	moderate	30 min
11:00	5	moderate	30 min
12:00	5	moderate	30 min
13:00	4	moderate	30 min
14:00	3	moderate	30 min
15:00	2	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 Williamstown

Throughout the year, UV index levels exhibit significant seasonal changes, with the highest risks occurring from November to March, where the index reaches extreme levels of 14 to 15 and a burn time of just 10 minutes. In contrast, the spring and summer months show a gradual decrease in UV exposure, with May through July categorized as moderate (UV Index 3 to 5) and allowing for burn times of 30 minutes. April and September present a shift back to high risk, falling into the very high category with a UV Index of 8 and a burn time of 15 minutes. Residents and visitors should take extra precautions during the high-risk months, particularly by wearing appropriate sun protection and limiting sun exposure to reduce the risk of skin damage, especially within the extreme months.

Monthly Maximum UV Index for Williamstown, Australia

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

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

Williamstown's solar exposure compared to other cities in Australia. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Melbourne UVI	14	12	11	7	4	3	3	5	7	9	12	14
Adelaide UVI	14	13	12	8	5	3	4	5	7	10	12	15
Sydney UVI	14	13	11	8	5	3	4	6	8	10	12	14
Williamstown	14	13	12	8	5	3	4	5	8	10	13	15
Perth UVI	14	14	11	9	6	4	4	6	8	11	13	14
Brisbane UVI	15	15	13	10	7	5	5	8	9	12	14	15