UV Index in Harriman, United States

Last updated: June 2, 2025

Understanding the UV Index is essential for residents of Harriman, United States, where the subtropical climate brings a mix of sunny days and high UV exposure risks. Awareness of UV levels is crucial for preventing sunburns and protecting skin health, especially during peak hours when the index can reach a high of 11 at midday. With Harriman experiencing significant UV radiation due to its Cfa climate, being informed can help you take necessary precautions, ensuring you enjoy the outdoors safely while protecting your skin from harmful ultraviolet rays.

Hourly UV Index in Harriman

The UV Index for the day starts gently, with values peaking at 1 from 7:00 AM to 8:00 AM. As the sun rises higher, the index escalates, reaching 3 by 9:00 AM. A significant surge occurs between 10:00 AM and 2:00 PM, where it escalates dramatically, peaking at a striking 11 from 1:00 PM to 2:00 PM—a clear indication to seek shade and protect your skin. The afternoon sees a gradual decline, with figures dropping to 10 at 3:00 PM, then to 7 at 4:00 PM. As the day winds down, the UV Index returns to safer levels, resting at 1 by 7:00 PM. Keep in mind, high UV levels call for precautions, especially in the midday sun!

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	5	moderate	30 min
11:00	7	high	25 min
12:00	10	very high	15 min
13:00	11	extreme	10 min
14:00	11	extreme	10 min
15:00	10	very high	15 min
16:00	7	high	25 min
17:00	5	moderate	30 min
18:00	3	moderate	30 min
19:00	1	low	45 min

Monthly UV Index Trends in Harriman

Throughout the year, UV exposure levels vary significantly, with high-risk months typically occurring from March to August when the UV Index reaches its peak at 11, categorized as extreme. March and April also feature very high levels, making these months crucial for sun safety awareness. Visitors and residents should be particularly cautious during this period, applying sunscreen regularly, wearing protective clothing, and seeking shade during peak hours. In contrast, the months of January, November, and December present a moderate UV Index of 3 to 5, allowing for more relaxed precautions, though it's still important to remain mindful of sun exposure. Always check local UV forecasts and adjust your sun safety practices accordingly to protect your skin year-round.

Monthly Maximum UV Index for Harriman, United States

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

The table above highlights how UV exposure in Harriman 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.

Harriman'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
Harriman	3	6	8	10	11	11	11	10	9	7	5	3
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5