UV Index in Harrisburg, United States

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents of Harrisburg, United States, as it provides essential information about the strength of ultraviolet radiation from the sun. High UV levels can lead to sunburns and long-term skin health issues, making awareness a key component of outdoor safety. Harrisburg, with its humid subtropical climate, experiences significant UV exposure, particularly during the summer months when index values can reach as high as 11 around midday. Stay informed and take protective measures to enjoy the sun responsibly in this vibrant city!

Hourly UV Index in Harrisburg

The UV Index throughout the day showcases a striking progression of solar intensity. Starting at a gentle 1 at 7:00 AM, it gradually climbs to a moderate 4 by 9:00 AM. The real heat hits at 11:00 AM, reaching a peak of 11, signifying that sun protection is essential during these hours. As the afternoon unfolds, the levels begin to taper off, with 10 at 2:00 PM and then descending to 4 by 5:00 PM. The day winds down with a comfortable 1 by 7:00 PM, making it a perfect time to enjoy the cool evening sun. Remember, the higher the UV Index, the more crucial it is to stay 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	2	low	45 min
09:00	4	moderate	30 min
10:00	6	high	25 min
11:00	9	very high	15 min
12:00	11	extreme	10 min
13:00	11	extreme	10 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 Harrisburg

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 Harrisburg, United States

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

The table above highlights how UV exposure in Harrisburg 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.

Harrisburg'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
Harrisburg	3	6	8	10	11	11	11	10	9	7	5	3
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5