UV Index in Falls Church, United States

Last updated: August 1, 2025

Understanding the UV Index is crucial for residents of Falls Church, Virginia, where sun exposure can lead to skin damage and increase the risk of skin cancer. With peak UV levels reaching a high of 10 at 1 PM, staying informed enables effective sunburn prevention and promotes long-term skin health. Falls Church, located in a humid subtropical climate (Cfa), experiences significant UV exposure, particularly during the warmer months. Being aware of these UV levels helps locals enjoy the outdoors safely while protecting their skin from harmful rays.

Hourly UV Index in Falls Church

The UV Index throughout the day paints a clear picture of sun intensity. Starting from a gentle 1 at 07:00, the UV levels gradually rise, peaking at an intense 10 by 13:00. This midday spike calls for caution as sun exposure increases significantly. As the afternoon progresses, from 14:00 to 15:00, the index slightly dips to 9 and 8, respectively, before gradually falling off to 6 at 16:00 and down to a mellow 1 by 19:00. For outdoor enthusiasts, the window between 11:00 and 13:00 is the time to enjoy the sun while remaining mindful of skin protection.

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
12:008very high15 min
13:009very high15 min
14:009very high15 min
15:007high25 min
16:005moderate30 min
17:003moderate30 min
18:002low45 min
19:001low45 min

Monthly UV Index Trends in Falls Church

Throughout the year, the UV Index demonstrates significant seasonal changes, highlighting the need for awareness regarding sun exposure. From January to February, UV levels are moderate (index 3-5), with a burn time of 30 minutes. As spring arrives in March, the index rises to 7, indicating high exposure risk with a reduced burn time of 25 minutes. The peak risk occurs from April through August, where the index reaches its highest levels (9-10) and burn times drop to just 15 minutes, categorizing these months as very high risk. In September and October, the UV index remains significant but decreases to high levels (7-8) with a burn time of 25 minutes. November and December return to moderate levels (index 3-5) with a burn time of 30 minutes. For visitors and residents alike, it is crucial to take protective measures, especially during the high-risk months from April to August, by using sunscreen, wearing protective clothing, and seeking shade during peak sunlight hours.

Monthly Maximum UV Index for Falls Church, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Falls Church. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098653
Data source: Statistical UV Index data for Falls Church, 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 Falls Church UV Index with Other United States Cities

The table above highlights how UV exposure in Falls Church 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.
Falls Church'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
Falls Church357910101098753
Los Angeles UVI46891011111010754
Houston UVI589111112121110975