UV Index in Martinsville, United States

Last updated: August 1, 2025

Understanding the UV Index is essential for the residents of Martinsville, United States, as it serves as a crucial tool in protecting your skin from harmful ultraviolet radiation. With increasing UV levels throughout the day peaking at an index of 10 around noon, awareness can significantly aid in sunburn prevention and the promotion of long-term skin health. Given Martinsville's humid subtropical climate, where the sun can be particularly intense, knowing your UV exposure risks can help you make informed decisions about outdoor activities, ensuring you enjoy the beautiful weather while staying safe. So, keep an eye on the UV Index and take proactive steps to shield yourself from the sun's rays!

Hourly UV Index in Martinsville

As the sun rises, the UV Index begins its gentle ascent, starting at 1 at 07:00. By 09:00, it climbs to 3, hinting at the day's potential for sun exposure. The heat peaks around 12:00, reaching a blistering 9, and hits its maximum at 13:00 and 14:00, both at a high of 10—a critical time for sun safety. As the afternoon transitions to evening, the UV Index gradually dips; by 18:00, it's down to 2, and as twilight approaches, it settles back at 1 by 19:00. Plan your outdoor activities wisely to stay safe in the sun!

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.
TimeUVICategoryTime to Burn
07:001low45 min
08:001low45 min
09:003moderate30 min
10:005moderate30 min
11:007high25 min
12:009very high15 min
13:0010very high15 min
14:0010very high15 min
15:008very high15 min
16:006high25 min
17:004moderate30 min
18:002low45 min
19:001low45 min

Monthly UV Index Trends in Martinsville

Throughout the year, the UV Index experiences significant seasonal changes, with the highest levels occurring from March to October. The high-risk months are typically March, April, May, June, July, August, September, and October, when the index reaches very high to extreme levels. Specifically, June presents the greatest risk with a UV Index of 11, indicating extreme exposure and a burn time of only 10 minutes. During these months, it is crucial for both visitors and residents to take proper precautions, including wearing sunscreen, protective clothing, and sunglasses, and seeking shade during peak hours (10 a.m. to 4 p.m.). In contrast, the months of January, February, November, and December have a moderate exposure category, allowing for longer burn times of 30 minutes. Awareness of these fluctuations can help everyone enjoy outdoor activities safely.

Monthly Maximum UV Index for Martinsville, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Martinsville. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec3689101110109753
Data source: Statistical UV Index data for Martinsville, 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 Martinsville UV Index with Other United States Cities

The table above highlights how UV exposure in Martinsville 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.
Martinsville's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Chicago UVI34689101098642
Brooklyn UVI35681010998642
New York City UVI35681010998642
Martinsville3689101110109853
Los Angeles UVI46891011111010754
Houston UVI589111112121110975