UV Index in Garnavillo, United States

Last updated: May 3, 2025

Understanding the UV Index in Garnavillo, United States, is crucial for safeguarding your skin against harmful UV radiation. As residents of this Dfa climate zone experience varying levels of sun exposure, being aware of UV levels can help prevent sunburn and promote overall skin health. With peak UV indices reaching as high as 9 around midday, it's essential to take precautions to protect yourself when the sun is at its strongest. By knowing the daily UV trends, you can enjoy the beautiful Iowa outdoors while minimizing risks associated with excessive sun exposure.

Hourly UV Index in Garnavillo

The UV Index rises steadily throughout the morning, with a low of 1 at 07:00, gradually climbing to 9 between 12:00 and 13:00, marking the peak of sun intensity. As the afternoon progresses, the index begins to decline, dropping to 8 at 14:00 and further easing to 7 by 15:00. As the sun sets, the UV Index continues to decrease, landing back at a mild 1 by 19:00. This data highlights the importance of protective measures during peak hours, especially between 11:00 and 13:00, when sun exposure poses the highest risk.

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	7	high	25 min
12:00	9	very high	15 min
13:00	9	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 Garnavillo

Throughout the year, the UV Index shows significant seasonal changes that impact sun safety for residents and visitors. From April to September, the UV Index peaks, reaching levels as high as 10 in the summer months of June and July. This indicates a very high exposure category, with a reduced burn time of only 15 minutes during these months. Conversely, during the winter months of December through February, the UV Index is considerably lower, ranging from 2 to 4, with a burn time of 30 to 45 minutes. Therefore, visitors and residents should be especially cautious during the high-risk months of April to September, and take appropriate protective measures, such as wearing sunscreen, protective clothing, and seeking shade, to minimize their risk of UV exposure.

Monthly Maximum UV Index for Garnavillo, United States

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

The table above highlights how UV exposure in Garnavillo 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.

Garnavillo'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
Garnavillo	3	4	5	8	9	10	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