UV Index in Downieville, United States

Last updated: July 2, 2025

Understanding the UV Index in Downieville, United States is crucial for protecting yourself from the sun's harmful rays. This important measurement helps you gauge daily UV levels, allowing you to take proactive steps to prevent sunburn and maintain optimal skin health. With Downieville's Csb climate, residents and visitors face unique UV exposure risks, especially during peak hours when the index can reach as high as 11. By staying informed about the UV Index, you can enjoy the beautiful outdoors safely, ensuring that every adventure is both fun and sun-smart.

Hourly UV Index in Downieville

The UV Index today paints a vivid picture of solar intensity, peaking dramatically between 12:00 PM and 2:00 PM with a striking 11—a warning to seek shade and protect skin. Starting the day at a gentle 1 at 7:00 AM, the index gradually climbs, reaching 4 by 9:00 AM and escalating to 9 by 11:00 AM. As the sun reaches its zenith, the index hits 11, indicating extreme conditions that persist for a solid three hours. Following this midday blast, it gracefully declines to 6 by 4:00 PM, before tapering off to a safer 1 by the evening. Remember to stay sun-smart during those peak 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	4	moderate	30 min
10:00	6	high	25 min
11:00	9	very high	15 min
12:00	11	extreme	10 min
13:00	11	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 Downieville

Throughout the year, the UV Index experiences significant fluctuations, with notable peaks during the summer months. High-risk months for UV exposure include March through September, where the index reaches a very high to extreme category, particularly in May, June, July, and August, with burn times as short as 10 minutes. In contrast, winter months like January, February, November, and December see a drop in UV levels, classified as moderate, allowing for longer burn times of up to 30 minutes. Visitors and residents are advised to take precautions during peak UV months by seeking shade, wearing protective clothing, and applying sunscreen regularly to reduce the risk of skin damage.

Monthly Maximum UV Index for Downieville, United States

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

The table above highlights how UV exposure in Downieville 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.

Downieville'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
Downieville	4	5	8	10	11	12	11	11	10	7	5	3
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5