UV Index in Princeton, Canada

Last updated: July 2, 2025

Understanding the UV Index in Princeton, Canada is crucial for everyone who enjoys the great outdoors. As the sunlight intensifies throughout the day, awareness of the UV levels can be a game changer in preventing sunburn and protecting skin health. With Princeton's Dsc climate bringing sunny summers and moderate UV exposure, knowing when to seek shade and apply sunscreen can help you enjoy the beauty of nature while minimizing risks. Stay informed and bask in the sun responsibly!

Hourly UV Index in Princeton

As the sun rises, the UV Index gradually climbs, starting at a gentle 1 at 07:00. By 09:00, it reaches 4, indicating it's time to take protective measures. The afternoon brings peak intensity, with the UV Index soaring to a striking 9 at noon, where it remains steady until 14:00. This strong level of UV radiation highlights the importance of sun safety during these hours. As the day progresses, the index begins to dip, settling at 5 by 16:00 and tapering off to 1 by 19:00, making the early evening hours much safer for outdoor activities. Be vigilant and protect your skin during peak hours!

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
10:005moderate30 min
11:007high25 min
12:009very high15 min
13:009very high15 min
14:009very high15 min
15:007high25 min
16:005moderate30 min
17:004moderate30 min
18:002low45 min
19:001low45 min

Monthly UV Index Trends in Princeton

Throughout the year, UV exposure varies significantly, with high-risk months typically occurring from April to August. During this period, the UV Index peaks at 9, indicating a very high exposure category and a burn time of just 15 minutes. Conversely, the winter months of December and January show a UV Index ranging from 1 to 2, categorized as low with more extended burn times of 45 minutes. Visitors and residents should take precautionary measures during the high-risk months by wearing protective clothing, applying sunscreen with high SPF, and seeking shade, especially during midday hours, to minimize the risk of skin damage. As conditions can still vary, it’s wise to check the UV Index daily to stay informed and safe.

Monthly Maximum UV Index for Princeton, Canada

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Princeton. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec235799987521
Data source: Statistical UV Index data for Princeton, 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 Princeton UV Index with Other Canada Cities

The table above highlights how UV exposure in Princeton compares to other major locations across Canada. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Princeton's solar exposure compared to other cities in Canada. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Edmonton UVI235677876421
Calgary UVI234688987421
Princeton235799997521
Montreal UVI245799887532
Ottawa UVI245899887532
Toronto UVI245899997532