UV Index in North Sioux City, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of North Sioux City, where the Dfa climate can lead to varying sun exposure throughout the year. Awareness of UV levels can help prevent sunburn and protect skin health, as even brief moments in the sun can cause lasting damage. Typical UV exposure peaks around noon, with readings soaring to 10 at 1 PM, emphasizing the importance of taking protective measures during those hours. By staying informed about the UV Index, you can enjoy the beautiful days North Sioux City offers while keeping your skin safe and healthy.

Hourly UV Index in North Sioux City

As the sun rises, the UV Index begins its gentle ascent, starting at 1 at 07:00. By 09:00, it climbs to 3, hinting at the day's potential for sun exposure. The heat peaks around 12:00, reaching a blistering 9, and hits its maximum at 13:00 and 14:00, both at a high of 10—a critical time for sun safety. As the afternoon transitions to evening, the UV Index gradually dips; by 18:00, it's down to 2, and as twilight approaches, it settles back at 1 by 19:00. Plan your outdoor activities wisely to stay safe in the 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	9	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 North Sioux City

The UV Index experiences significant seasonal changes, with high-risk months typically from April to September when the levels elevate to very high and extreme categories. Notably, June peaks at a UV Index of 11, indicating an extreme risk of harm from unprotected sun exposure, with a burn time of just 10 minutes. May and July follow closely behind, both maintaining UV indexes of 9 and 10. Visitors and residents are strongly advised to take precautions during these months, including seeking shade, wearing protective clothing, and applying sunscreen regularly to mitigate UV exposure. In contrast, from October to March, the UV Index drops to moderate or low levels, with burn times increasing to 30 to 45 minutes, making sun protection less critical during this period.

Monthly Maximum UV Index for North Sioux City, United States

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

The table above highlights how UV exposure in North Sioux City 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.

North Sioux City'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
North Sioux City	3	5	5	8	9	11	10	9	8	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