UV Index in Logan, United States

Last updated: June 2, 2025

Understanding the UV Index is essential for residents and visitors of Logan, United States, where the climate's warm summers and clear skies can lead to significant sun exposure. Being aware of UV levels is crucial for preventing sunburns and maintaining long-term skin health, especially during peak hours when the index can soar to 10 around midday. With typical UV exposure risks heightened in this climate zone (Dfa), it's vital to stay informed about daily UV levels to safeguard your skin while enjoying the beautiful outdoors.

Hourly UV Index in Logan

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 Logan

Throughout the year, UV exposure varies significantly, peaking in the late spring and summer months. April to August represent the high-risk period, with UV Index values reaching 10; indicating a very high exposure category and a burn time as short as 15 minutes. Visitors and residents should exercise caution and take protective measures, such as wearing sunscreen and protective clothing during these months. In contrast, January and December have moderate and low UV levels, respectively, with longer burn times of 30 to 45 minutes. Action is still advisable during these months, but the intensity is notably lower, allowing for safer outdoor activities. Overall, awareness of seasonal UV changes is essential for protecting skin health year-round.

Monthly Maximum UV Index for Logan, United States

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

The table above highlights how UV exposure in Logan 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.

Logan'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
Logan	3	5	6	8	10	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