UV Index in Gretna, United States

Last updated: July 2, 2025

Understanding the UV Index in Gretna, United States is crucial for protecting your skin in this vibrant community. With peak UV levels reaching up to 12 during the day, awareness of these readings can help residents and visitors alike prevent sunburn and promote long-term skin health. Given Gretna's Cfa climate, which features warm summers and high sun exposure, being informed about UV levels is vital for outdoor activities. By staying aware of the UV Index, you can enjoy the sunny days while safeguarding your skin from the potential risks associated with excessive sun exposure.

Hourly UV Index in Gretna

The UV Index throughout the day tells an intriguing story of rising intensity and afternoon peaks. Starting from a gentle 1 at 07:00, it gradually ascends, reaching 5 by 10:00. The sun's power is unmistakable as it climbs to an impressive 10 at noon and skyrockets to a blistering 12 by 14:00—the highest point of the day. As the afternoon wanes, the index begins to dip, returning to 5 at 17:00 and then gently fading to 1 by 19:00, signaling the end of the day. This data highlights the importance of sun protection during the peak hours, particularly between 11:00 and 15:00, when UV exposure can be most harmful. Stay safe and enjoy the sunshine wisely!

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
09:002low45 min
10:005moderate30 min
11:007high25 min
12:0010very high15 min
13:0011extreme10 min
14:0012extreme10 min
15:0010very high15 min
16:008very high15 min
17:005moderate30 min
18:003moderate30 min
19:001low45 min

Monthly UV Index Trends in Gretna

As the seasons change, so too does the UV Index, which significantly impacts exposure and burn time. From January's moderate UV Index of 5 with a burn time of 30 minutes, we enter a period of increasing risk; February through April sees a jump into the very high category, consistently reaching 8 to 10. The height of summer marks the peak danger, with May through July classified as extreme (UV Index 11 to 12), where just 10 minutes of exposure can lead to burns. August returns to an extreme level before tapering off in September and October to a very high index of 10 and 8 respectively. November and December bring a return to high and moderate levels, with more forgiving burn times of 25 and 30 minutes. Visitors and residents are advised to take necessary precautions, particularly during the high-risk months of February through October, wearing sunscreen, protective clothing, and seeking shade, especially during peak sunlight hours.

Monthly Maximum UV Index for Gretna, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Gretna. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec589101111121110864
Data source: Statistical UV Index data for Gretna, 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 Gretna UV Index with Other United States Cities

The table above highlights how UV exposure in Gretna 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.
Gretna'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
Gretna589101111121110864
Houston UVI589111112121110975