UV Index in Lyons, United States

Last updated: June 2, 2025

Awareness of the UV Index in Lyons, United States is essential for protecting your skin and ensuring your overall health. As the sun's intensity fluctuates throughout the day, understanding these UV levels can help you prevent sunburn and reduce long-term skin damage. With Lyons experiencing a Dfa climate, the combination of warm summers and clear skies leads to elevated UV exposure, particularly during the midday hours when the index reaches its peak, hitting a high of 10 around 1 PM. By staying informed about the UV Index, you can enjoy the outdoors safely while prioritizing your skin health.

Hourly UV Index in Lyons

Starting off the day, the UV Index at 7:00 AM was a safe 1, gradually climbing to 2 by 8:00 AM. As the sun rose higher, it peaked at a striking 10 between 1:00 PM and 2:00 PM, indicating a significant risk for harmful effects on unprotected skin. The intensity of UV radiation began to wane in the afternoon, dropping to 9 at 3:00 PM and steadily decreasing to 4 by 5:00 PM. As evening approached, the index fell further to 2 at 6:00 PM and capped the day at a low 1 by 7:00 PM. This hourly trend highlights the importance of sun protection during peak hours, particularly between 11:00 AM and 2:00 PM, when the UV Index is at its highest.

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	8	very high	15 min
12:00	9	very high	15 min
13:00	10	very high	15 min
14:00	10	very high	15 min
15:00	9	very high	15 min
16:00	7	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 Lyons

Throughout the year, UV index levels fluctuate significantly, with notable increases during the warmer months. January and February experience a moderate UV index of 3 and 4, allowing for a 30-minute burn time under the sun. As the seasons transition into March and onward, the risk escalates, peaking in June and July with a maximum UV index of 10—classifying these months as high-risk. During these summer months, individuals are advised to limit sun exposure to just 15 minutes to prevent skin damage. The trend continues with August and September maintaining high levels (UV index of 9 and 8 respectively) before tapering off in October (UV index 6) and returning to moderate levels in November and December (UV index of 4 and 2). Residents and visitors should prioritize sun protection, especially during the peak months of April through September.

Monthly Maximum UV Index for Lyons, United States

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

The table above highlights how UV exposure in Lyons 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.

Lyons'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
Lyons	3	4	6	8	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