UV Index in Petersburg, United States

Last updated: August 1, 2025

Understanding the UV Index is crucial for residents of Petersburg, United States, as it serves as a key indicator of the sun’s intensity and potential skin risks. With UV levels peaking at 11 around noon, the awareness of these readings can play a vital role in preventing sunburn and protecting overall skin health. Petersburg experiences a Dfa climate, characterized by warm summers that elevate UV exposure risks, especially during midday hours. Stay informed and proactive about your sun safety to enjoy the beautiful outdoors while safeguarding your skin.

Hourly UV Index in Petersburg

The UV Index for today starts off mild, peaking at 1 by 7:00 AM, then gradually increases as the sun climbs higher in the sky. By 10:00 AM, it hits 6, indicating a moderate level of UV exposure. The intensity keeps climbing, reaching a maximum of 11 at 1:00 PM, making this the most crucial time for sun safety. As the afternoon progresses, the index begins to wane, dropping to 8 by 3:00 PM, then further to 2 by the evening, signalling a return to a safer UV environment. Remember, protecting your skin is vital during those peak hours of 10 AM to 2 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
09:003moderate30 min
10:005moderate30 min
11:007high25 min
12:009very high15 min
13:009very high15 min
14:009very high15 min
15:007high25 min
16:005moderate30 min
17:003moderate30 min
18:001low45 min
19:001low45 min

Monthly UV Index Trends in Petersburg

Throughout the year, the UV Index exhibits notable seasonal variations that can significantly impact skin health. From January to March, the UV Index gradually increases, reaching a high of 7 in March, indicating a growing risk for skin damage. April and May see a sharp rise, with very high values of 9 and 10, encouraging caution as burn times decrease to just 15 minutes. The peak occurs in June and July, where the UV Index reaches an extreme level of 11, suggesting a maximum burn time of only 10 minutes—making these the highest-risk months. As summer wanes into August and September, the levels remain very high but slightly decrease. October brings a safer high UV Index of 6, while the year wraps up with moderate levels in November and December. To protect against UV exposure, both visitors and residents are advised to take precautions during the high-risk months, particularly from April to September, such as wearing protective clothing, utilizing sunscreen, and seeking shade during peak hours.

Monthly Maximum UV Index for Petersburg, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Petersburg. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec357910111198643
Data source: Statistical UV Index data for Petersburg, 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 Petersburg UV Index with Other United States Cities

The table above highlights how UV exposure in Petersburg 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.
Petersburg'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
Petersburg357910111198643
Los Angeles UVI46891011111010754
Houston UVI589111112121110975