UV Index in Coulterville, United States

Last updated: August 1, 2025

Understanding the UV Index is crucial for residents of Coulterville, United States, where sun exposure can be significant, especially during the warmer months. The UV Index provides essential information about the intensity of ultraviolet radiation and guides you in taking necessary precautions to prevent sunburn and protect your skin health. With Coulterville's Cfa climate, characterized by warm summers and mild winters, it's vital to be aware of daily UV levels—particularly when they peak around midday, reaching levels as high as 10, which can pose serious risks. Stay informed and safeguard your skin by checking the UV Index regularly!

Hourly UV Index in Coulterville

The UV Index data unveils a dynamic progression of sun intensity throughout the day. Starting low at 1 at 07:00, the index gradually escalates, reaching maximum levels of 10 between 12:00 and 14:00. This peak signals a critical time for sun protection. As the afternoon wanes, the index tapers off to 8 at 15:00, and then descends further to 3 by 17:00, and 2 by 18:00. Ultimately, the day concludes softly with a return to 1 at 19:00. It's essential to stay vigilant during those peak hours to safeguard your skin while enjoying the sun!

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	9	very high	15 min
15:00	7	high	25 min
16:00	5	moderate	30 min
17:00	3	moderate	30 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Coulterville

Throughout the year, UV Index values exhibit notable seasonal changes, with the highest levels typically occurring during the late spring and summer months. March marks the shift into high UV exposure, escalating to an extreme UV Index of 11 in May and June, indicating significant risk for skin damage with a very short burn time of just 10 minutes. Visitors and residents should be particularly vigilant from April to September, the high-risk months, where daily activities should involve protective measures such as sunscreen, hats, and UV-blocking clothing. As the year progresses into fall and winter, UV levels decrease, returning to a moderate category, but it’s essential to remain cautious even during this time, especially on sunny days.

Monthly Maximum UV Index for Coulterville, United States

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

The table above highlights how UV exposure in Coulterville 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.

Coulterville'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
Coulterville	3	5	7	9	11	11	10	10	9	7	5	3
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