UV Index in Harlem, United States

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents of Harlem, United States, where sun exposure can have significant implications for skin health. With typical midday readings peaking at an 8, awareness of these levels helps prevent sunburn and long-term skin damage. Harlem's BSk climate brings unique challenges, particularly during the summer months when UV radiation is stronger, making it essential to stay informed about daily UV levels to protect yourself and enjoy the outdoors safely.

Hourly UV Index in Harlem

The UV index throughout the day reveals a fascinating pattern of sun intensity. Early risers will notice a gentle start at 1 around 7:00 AM, gradually climbing to a moderate 3 by 9:00 AM. As the sun reaches its peak, the index hits 6 at 11:00 AM, escalating to an impressive 8 from 12:00 PM to 2:00 PM—the height of solar exposure. After this, the UV levels begin to wane, dropping to 7 at 3:00 PM, and further decreasing to moderate numbers of 5, 3, and 2 as the sun sets, concluding the day with a calm 1 at 7:00 PM. Remember, during the peak hours, sun safety is crucial!

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	3	moderate	30 min
10:00	5	moderate	30 min
11:00	6	high	25 min
12:00	8	very high	15 min
13:00	8	very high	15 min
14:00	8	very high	15 min
15:00	7	high	25 min
16:00	5	moderate	30 min
17:00	3	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Harlem

Throughout the year, the UV Index experiences notable seasonal variations. January and December mark the lowest UV levels, categorized as low, with a burn time of 45 minutes. As spring approaches, both February and March see an increase to moderate levels, indicating a burn time of 30 minutes. The UV Index peaks in the summer months of May through August, reaching very high levels (UV Index 8-9) with a significantly reduced burn time of just 15 minutes. As autumn sets in, September returns to a high exposure category, allowing for a 25-minute burn time, while October and November shift back to moderate. Given these fluctuations, it’s crucial for visitors and residents to take precautions during the high-risk months of May through August, including seeking shade, wearing protective clothing, and applying sunscreen to prevent skin damage.

Monthly Maximum UV Index for Harlem, United States

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

The table above highlights how UV exposure in Harlem 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.

Harlem'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
Harlem	2	3	5	7	8	9	9	9	7	5	3	2
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
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5