UV Index in Green River, United States

Last updated: June 2, 2025

In Green River, United States, awareness of the UV Index is crucial for safeguarding skin health and preventing painful sunburns. With a climate typical of the BWk zone, residents and visitors alike face varying levels of UV exposure throughout the day, peaking at a striking UV Index of 12 around noon. Understanding these UV levels can empower you to take proactive measures, ensuring that your time outdoors remains enjoyable while minimizing the risks associated with excessive sun exposure. So whether you’re hiking, lounging at a park, or simply running errands, staying informed about the UV Index is your first line of defense against sun damage!

Hourly UV Index in Green River

As the sun rises, the UV Index begins its ascent, starting at a modest 1 by 7:00 AM. By 9:00 AM, it jumps to 4, signaling that the sun is getting stronger. 10:00 AM witnesses a significant surge to 6, and just after 11:00 AM, the Index soars to its peak at 12. The intensity remains high, hitting 11 again by 2:00 PM, before gradually declining through the afternoon. At 4:00 PM, it drops to 7, and by 6:00 PM, it recedes further to 3, echoing the day's retreat. By the time night falls at 7:00 PM, the UV Index returns to a safe level of 1. Remember to stay protected during those peak hours between 11:00 AM and 2:00 PM!

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
08:002low45 min
09:004moderate30 min
10:006high25 min
11:009very high15 min
12:0011extreme10 min
13:0012extreme10 min
14:0011extreme10 min
15:0010very high15 min
16:007high25 min
17:005moderate30 min
18:003moderate30 min
19:001low45 min

Monthly UV Index Trends in Green River

Throughout the year, UV Index levels vary significantly, with high-risk months occurring from March to August. During this period, particularly in May, June, and July, the UV Index reaches its peak at 12, indicating an extreme exposure category with a burn time of just 10 minutes. To reduce the risk of harmful effects from UV radiation, visitors and residents should take extra precautions during these months, especially in late spring and summer. In contrast, the lower UV levels in January, November, and December, with a maximum index of 3, represent moderate exposure, allowing for longer burn times of 30 minutes. It is advisable for everyone to stay informed on UV levels year-round and adjust their sun protection strategies accordingly.

Monthly Maximum UV Index for Green River, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Green River. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec368101112121110753
Data source: Statistical UV Index data for Green River, 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 Green River UV Index with Other United States Cities

The table above highlights how UV exposure in Green River 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.
Green River'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
Los Angeles UVI46891011111010754
Green River368101112121110753
Houston UVI589111112121110975