UV Index in Hesperia, United States

Last updated: June 2, 2025

Understanding the UV Index in Hesperia, California, is essential for maintaining your skin health and preventing sunburn, especially given the region's warm, Mediterranean climate. With peak UV levels frequently reaching 10 to 12 during midday hours, residents and visitors alike must be vigilant about sun exposure to protect themselves from harmful effects. By staying informed about UV levels, you can take proactive measures to shield your skin, ensuring a safe and enjoyable experience in this sunny desert oasis where outdoor activities abound.

Hourly UV Index in Hesperia

As the sun rises, the UV Index begins its ascent, starting at a gentle 1 by 7:00 AM. By 9:00 AM, it reaches a moderate 5, but soon after, the intensity peaks. At 11:00 AM, the index hits 10, and by noon, it soars to a scorching 12, indicating a high risk of harm from unprotected sun exposure. The afternoon maintains this intensity, with the index remaining steady at 12 until 1:00 PM, before gradually declining. By 3:00 PM, it starts its descent to 8, then dips further to 6 by 4:00 PM, and settles back to a safer 2 by 6:00 PM. As the sun begins to set, the evening returns to a minimal 1 by 7:00 PM, reminding us to enjoy the daytime sun responsibly.

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	5	moderate	30 min
10:00	8	very high	15 min
11:00	10	very high	15 min
12:00	12	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	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Hesperia

The UV Index experiences significant seasonal variation, peaking between March and August when exposure levels reach extreme categories. Notably, April, May, and June have the highest readings at 11 and 12, indicating a burn time as short as 10 minutes during these months. Visitors and residents should be particularly cautious from March to August, with March and April marking the onset of these high-risk months. During this time, it is advisable to wear protective clothing, apply sunscreen frequently, and seek shade whenever possible, especially during midday hours. As fall approaches, the UV Index begins to decline, offering slightly safer conditions in October and November, yet vigilance is still recommended during these months with moderate exposure.

Monthly Maximum UV Index for Hesperia, United States

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

The table above highlights how UV exposure in Hesperia 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.

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