UV Index in Randolph, United States

Last updated: July 2, 2025

Understanding the UV Index is essential for residents of Randolph, United States, especially during the sunny months when the risk of skin damage is heightened. The UV Index serves as a daily reminder of UV radiation levels, helping you take proactive steps to prevent sunburn and promote long-term skin health. With a climate categorized as Dfb, Randolph experiences significant UV exposure, particularly around midday when values can reach a severe level of 12. Staying informed about these fluctuating levels empowers you to enjoy the outdoors safely while protecting your skin from harmful rays.

Hourly UV Index in Randolph

At dawn, the UV Index starts off gentle, peaking at 1 by 07:00. As the sun rises higher, its intensity escalates dramatically, reaching 6 by 10:00 and soaring to a blistering 12 at 13:00—the highest point of the day. From then, the index begins a gradual descent, tapering to 10 by 15:00, followed by 8 at 16:00, and finally falling back to 1 by 19:00. This dynamic pattern highlights the importance of sun protection during midday hours, when UV exposure is at its most intense, especially between 11:00 and 14:00. Stay safe and enjoy the sunshine 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	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	12	extreme	10 min
14:00	11	extreme	10 min
15:00	10	very high	15 min
16:00	8	very high	15 min
17:00	5	moderate	30 min
18:00	3	moderate	30 min
19:00	1	low	45 min

Monthly UV Index Trends in Randolph

Throughout the year, UV Index levels fluctuate significantly, with high-risk months predominantly falling between March and August. During this period, the UV Index reaches extreme levels of 11 to 12, with dangerous burn times as short as 10 minutes. For optimal sun safety, it is crucial for visitors and residents to take precautions, especially from April to August, when the sun's intensity is at its peak. In contrast, levels begin to decline in autumn, with September and October displaying a moderate risk before transitioning to lower levels in the winter months. To minimize skin damage, we recommend employing protective measures such as wearing sunscreen, sunglasses, and protective clothing, particularly during the high-risk months. Staying aware of the UV Index can help ensure a safe and enjoyable experience outdoors.

Monthly Maximum UV Index for Randolph, United States

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

The table above highlights how UV exposure in Randolph 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.

Randolph'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
Randolph	4	6	8	11	11	12	12	11	9	7	5	3
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5