UV Index in Zionsville, United States

Last updated: June 2, 2025

In Zionsville, understanding the UV Index is essential for protecting your skin from harmful ultraviolet rays, especially during those peak hours when the index reads 9 to 11. Being aware of these levels helps you take proactive measures against sunburn and long-term skin health issues. With Zionsville's Cfa climate—characterized by hot summers and varied humidity—residents face significant UV exposure risks, particularly from late morning to mid-afternoon. By staying informed about the UV Index, you can enjoy the outdoors while keeping your skin safe and healthy.

Hourly UV Index in Zionsville

The UV Index paints a vivid picture of sun exposure throughout the day. Starting off with a gentle rise, the index registers a calm 1 at 07:00 and 08:00. As the sun ascends, it peaks dramatically at 11:00 with a robust 7, reaching a scorching 9 by noon. The heat intensifies, peaking at an exceptional 11 between 14:00 and 13:00, marking the hours of highest risk for skin damage. By 16:00, a gradual decline begins, as the index drops to 7, and continues to fall through the evening, settling at a more manageable 2 by 19:00. For those spending time outdoors, this data underscores the importance of sun safety, especially during the midday hours when UV exposure is at its peak.

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	9	very high	15 min
13:00	10	very high	15 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	2	low	45 min

Monthly UV Index Trends in Zionsville

As the seasons change, so do the UV Index levels, significantly impacting sun exposure risk. High-risk months occur from April through September, with the peak UV Index reaching 11 in June, categorized as extreme, and a burn time of just 10 minutes. In contrast, January and December present the lowest risk, with UV Index levels of 3 and 2, respectively. Visitors and residents should be particularly cautious during the very high to extreme UV periods; wearing sunscreen, seeking shade, and wearing protective clothing are essential measures to minimize the risk of sunburn and long-term skin damage. Regularly checking the daily UV Index will help ensure safe outdoor activities throughout the year.

Monthly Maximum UV Index for Zionsville, United States

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

The table above highlights how UV exposure in Zionsville 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.

Zionsville'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
Zionsville	3	5	6	9	10	11	10	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