UV Index in Defiance, United States

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents of Defiance, United States, where the climate can lead to significant sun exposure throughout the year. Awareness of UV levels helps in preventing sunburn and safeguarding your skin health, making it essential for everyone, especially during peak hours when the UV Index soars to levels of 9 and 10. With a climate classified as Dfa, which signifies hot summers, the risk of UV-related skin damage increases, particularly from late morning to mid-afternoon. Stay informed and protect yourself to enjoy the sun safely!

Hourly UV Index in Defiance

As the sun rises, the UV Index begins its gradual ascent, starting at a mild 1 at 07:00 and 08:00. However, by 09:00, it jumps to 3, indicating a greater need for sun protection. The intensity peaks at 12:00 with a 9, reaching a maximum of 10 during the 13:00 and 14:00 hours, showcasing the sun's strongest rays. As the day progresses, the UV Index begins to decline, dropping to 8 at 15:00, then further to 6 by 16:00. The evening brings a welcome reduction in UV exposure, with the index falling to 4 at 17:00, and tapering off to 2 and 1 as the sun sets at 18:00 and 19:00. It's clear that the mid-day hours demand the most caution for sun safety!

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	4	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 Defiance

Throughout the year, the UV Index experiences significant fluctuations, with the highest levels occurring during the summer months. High-risk months for UV exposure include April through September, when the UV Index reaches very high levels of 9 or 10, significantly reducing the safe burn time to just 15 minutes. Visitors and residents are strongly advised to take precautions during these months, including wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade during peak sun hours. Conversely, the winter months of December and January present lower UV risks, with indices of 2 and 3, allowing for safer exposure times of 30 to 45 minutes. Overall, awareness of seasonal changes in UV levels is crucial for protecting skin health throughout the year.

Monthly Maximum UV Index for Defiance, United States

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

The table above highlights how UV exposure in Defiance 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.

Defiance'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
Defiance	3	5	6	9	9	10	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