UV Index in Saint Joseph, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Saint Joseph, United States, where sun exposure can significantly impact skin health. With the region's Cfa climate, warm summers bring higher UV levels that can lead to sunburn and long-term skin damage if precautions aren’t taken. As the UV Index can soar to a blistering 12 at midday, staying informed about daily UV levels is essential for protecting yourself and your loved ones. Being proactive about sun protection not only helps prevent immediate discomfort but also safeguards against more serious health issues in the future.

Hourly UV Index in Saint Joseph

The UV Index throughout the day paints a vivid picture of sun intensity, starting from a gentle 1 at 07:00 and gradually climbing as the sun rises higher. By 09:00, it reaches 3, but the real surge occurs at 10:00, leaping to 6. The peak comes at 12:00 with a blistering 11, continuing at 13:00 with a maximum of 12—a strong reminder for sun safety! As the afternoon unfolds, the intensity gracefully dips, falling to 9 by 15:00, then to 4 at 17:00. Finally, as daylight wanes, the UV levels drop back down to a soothing 2 by 18:00, and return to the calm 1 by 19:00. This progression showcases not only the sun's power but also the importance of taking protective measures, especially during midday hours!

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	6	high	25 min
11:00	9	very high	15 min
12:00	11	extreme	10 min
13:00	12	extreme	10 min
14:00	11	extreme	10 min
15:00	9	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 Saint Joseph

Throughout the year, UV radiation levels vary significantly, with the highest risk months being March through August. During this period, the UV Index reaches extreme levels, peaking at 12 in June and July, where the recommended burn time is as little as 10 minutes. Visitors and residents should exercise caution and take protective measures, such as wearing sunscreen, hats, and UV-protective clothing, especially in late spring and summer. Conversely, the winter months of January and December present a lower risk with a moderate UV Index of 4 and a longer burn time of 30 minutes. However, it's imperative to remain vigilant year-round, as even moderate levels can contribute to skin damage over time.

Monthly Maximum UV Index for Saint Joseph, United States

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

The table above highlights how UV exposure in Saint Joseph 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.

Saint Joseph'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
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Saint Joseph	4	7	9	11	11	12	12	11	10	8	6	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5