UV Index in Folsom, United States

Last updated: May 3, 2025

In Folsom, United States, awareness of the UV Index is crucial for protecting your skin and overall health. With the sun's intensity peaking during the midday hours, understanding UV levels helps residents prevent sunburn and reduce the risk of long-term skin damage. Folsom’s Cfa climate brings warm summers and ample sunshine, leading to elevated UV exposure, especially between 10 AM and 2 PM when the UV Index can reach a staggering 12. Stay informed to enjoy the outdoors safely while safeguarding your skin!

Hourly UV Index in Folsom

The UV Index peaks dramatically as the day unfolds, making sun safety a critical consideration. At 07:00, the UV Index starts at a modest 1, but by 09:00, it climbs to 4, signaling a noticeable increase in solar intensity. The highest reading occurs at 12:00, reaching a staggering 11, which indicates a very high level of UV radiation—perfect conditions for seeking shade or wearing protective clothing. As the afternoon progresses, the index begins to decline from 12:00 to 15:00, with 11 and 8 respectively, before tapering off to 3 by 17:00. The evening light brings relief as the UV Index drops back to 1 by 18:00, encouraging outdoor relaxation post-sun exposure. Always remain vigilant 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	7	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	8	very high	15 min
16:00	6	high	25 min
17:00	3	moderate	30 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Folsom

Throughout the year, UV Index levels exhibit significant seasonal variations that pose varying degrees of risk for sun exposure. The high-risk months are primarily from February to August, with April to July classified as having an extreme UV Index of 11 or 12, indicating a rapid burn time of just 10 minutes. Visitors and residents should take precautionary measures during these months, such as wearing protective clothing, applying sunscreen, and seeking shade, especially during midday hours when the risk is greatest. In contrast, January, November, and December feature moderate to high risk levels, allowing for a more extended burn time of up to 30 minutes. Overall, understanding UV changes and adjusting one’s outdoor activities accordingly is essential for staying safe while enjoying the sun.

Monthly Maximum UV Index for Folsom, United States

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

The table above highlights how UV exposure in Folsom 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.

Folsom'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
Folsom	5	8	9	11	11	12	11	11	10	8	6	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5