UV Index in Troy, United States

Last updated: May 3, 2025

In Troy, United States, staying informed about the UV Index is crucial for safeguarding your skin from harmful ultraviolet rays. Understanding daily UV levels helps residents take proactive measures against sunburn and long-term skin damage. With a humid subtropical climate (Cfa), Troy experiences varying UV exposure risks, especially during peak hours when UV Index levels can reach as high as 10 between noon and 2 PM. By keeping an eye on the UV Index, Troy residents can enjoy the outdoors while protecting their skin health all year round.

Hourly UV Index in Troy

As the day unfolds, the UV Index begins its ascent, starting at a mild 1 in the early morning hours of 07:00 and 08:00. By 09:00, it jumps to 3, signaling the onset of stronger sun exposure. The UV levels peak dramatically at 12:00 with a scorching 10, remaining at this peak until 14:00—a crucial time to stay protected under the sun. As the afternoon wanes, the index gradually descends, dropping to 8 by 15:00, and further to 4 by 17:00. As evening approaches, the UV Index relaxes back to 2 by 18:00 and finally returns to 1 at 19:00. This data underscores the importance of sunscreen and protective measures during the hours when UV levels are at their 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	1	low	45 min
08:00	1	low	45 min
09:00	3	moderate	30 min
10:00	6	high	25 min
11:00	8	very high	15 min
12:00	10	very high	15 min
13:00	10	very high	15 min
14:00	10	very high	15 min
15:00	8	very high	15 min
16:00	6	high	25 min
17:00	4	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Troy

Throughout the year, the UV Index exhibits significant variations, with high-risk months occurring from March to August, where the index reaches very high to extreme levels. In March and April, the UV Index peaks at 10, and it escalates to 11 in June and July, indicating an urgent need for sun protection since the burn time drops to just 10 minutes during these months. The risk decreases in the fall and winter, with November and December showing moderate levels (UV Index of 5 and 3, respectively) and extended burn times of 30 minutes. To ensure safety, visitors and residents are advised to take extra precautions during the high-risk months by wearing sunscreen, protective clothing, and seeking shade, while enjoying outdoor activities to minimize the risk of skin damage.

Monthly Maximum UV Index for Troy, United States

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

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

Troy's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Chicago UVI	3	4	6	8	9	10	10	9	8	6	4	2
Brooklyn UVI	3	5	6	8	10	10	9	9	8	6	4	2
New York City UVI	3	5	6	8	10	10	9	9	8	6	4	2
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Troy	4	6	8	10	10	11	11	10	9	8	5	3
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5