UV Index in Shasta, United States

Last updated: July 2, 2025

Understanding the UV Index is essential for residents and visitors in Shasta, United States, where the region's Csa climate brings plenty of sunshine year-round. As UV levels can soar, particularly during midday, being aware of these readings is crucial for preventing sunburn and protecting long-term skin health. With UV Index values peaking at 10 from noon to 2 PM, it's vital to stay informed about your exposure risks and take necessary precautions to enjoy the beautiful outdoors safely.

Hourly UV Index in Shasta

The UV Index on this particular day paints a striking picture of sun intensity as it unfolds throughout the hours. Starting with a gentle maximum of 1 at 07:00, the sun gradually rises, peaking to a significant 10 by midday at 12:00, signaling the height of solar radiation. This intensity remains unwavering at 10 from 13:00 to 14:00, providing a bold reminder to stay sun-safe. As the day progresses, the UV Index begins to retreat, dipping to 8 at 15:00, and continuing its descent to a milder 1 by 19:00. Whether lounging outdoors or engaging in activities, it's essential to be mindful of these fluctuations and adequately protect your skin 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	3	moderate	30 min
10:00	6	high	25 min
11:00	8	very high	15 min
12:00	10	very high	15 min
13:00	10	very high	15 min
14:00	10	very high	15 min
15:00	8	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 Shasta

The UV Index experiences significant variability throughout the year, with high-risk months typically occurring from March to September. Starting with a moderate index of 3 in January, the UV levels gradually rise, peaking at an extreme level of 11 in June. During this peak, the burn time shortens to just 10 minutes, highlighting the need for caution. Following June, the index remains very high into August, with values between 9 and 10, before gradually declining as autumn approaches. As October to December arrives, UV levels drop significantly, with the safest exposure category recorded in December at a low 2. To protect themselves, visitors and residents are advised to take precautions such as wearing sunscreen, protective clothing, and seeking shade especially during the high-risk months from April through September when exposure can lead to serious skin damage.

Monthly Maximum UV Index for Shasta, United States

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

The table above highlights how UV exposure in Shasta 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.

Shasta'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
Shasta	3	4	7	8	10	11	10	10	9	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