UV Index in Downieville, United States

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of Downieville, United States, where the beautiful yet variable climate can pose hidden risks from sun exposure. With UV levels peaking at a staggering 11 around noon, awareness of these fluctuations is vital for preventing sunburn and maintaining skin health. As a Csb climate zone locale, Downieville typically enjoys sunny days, but it’s important to recognize that even on cooler days, UV rays can still lead to skin damage. Equip yourself with the knowledge of the UV Index to enjoy the outdoors safely while protecting your skin.

Hourly UV Index in Downieville

Expect a sunny day with a fluctuating UV Index that peaks at 11 around midday. The morning starts off gentle, with values rising from 1 at 7:00 AM to 4 by 9:00 AM. As the sun climbs higher, the UV Index escalates sharply, reaching 9 by 11:00 AM and hitting its highest point of 11 at both 12:00 PM and 1:00 PM. After the sun’s zenith, the UV levels gradually decline, dropping to 10 at 2:00 PM and tapering off to 1 by 7:00 PM. Remember to protect your skin during those peak hours for a safe and enjoyable day outdoors!

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	10	very high	15 min
15:00	8	very high	15 min
16:00	6	high	25 min
17:00	3	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