UV Index in Granby, Canada

Last updated: August 1, 2025

Understanding the UV Index in Granby, Canada, is crucial for safeguarding your skin and overall health. The higher the UV levels—especially during the peak hours between 11:00 AM and 3:00 PM—the greater the risk of sunburn, premature aging, and skin cancer. With Granby's Dfb climate bringing warm summers and variable exposure risks, it's essential to stay informed to enjoy the outdoors safely. By keeping an eye on the UV Index, you can take proactive measures to protect yourself and your loved ones, ensuring that fun in the sun doesn’t come at the cost of your skin health.

Hourly UV Index in Granby

As the sun rises, the UV Index begins its steady climb, starting from a gentle 1 at 7:00 AM. By 10:00 AM, it reaches 5, signaling an increase in UV exposure. The peak occurs at 12:00 PM, hitting a robust 8, where caution is advised, especially for outdoor activities. The intensity remains high at 8 from 1:00 PM to 2:00 PM, encouraging sun protection measures. As the afternoon progresses, the index gradually declines to 6 at 3:00 PM, then further to 3 by 5:00 PM. Finally, as the day winds down, the UV Index settles at 1 by 7:00 PM, reflecting a much safer environment for evening activities. Enjoy the sun, but remember to protect your skin during those 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
09:003moderate30 min
10:005moderate30 min
11:007high25 min
12:008very high15 min
13:008very high15 min
14:007high25 min
15:006high25 min
16:004moderate30 min
17:003moderate30 min
18:001low45 min
19:001low45 min

Monthly UV Index Trends in Granby

The UV Index varies significantly throughout the year, reflecting notable seasonal changes in sun exposure. From January to March, UV levels remain relatively low to moderate, with a maximum index of 5 in March, granting burn times of up to 45 minutes. However, by April, the UV Index spikes to 8, marking the beginning of high-risk months that persist through August, where it reaches a peak of 9. During these critical summer months, burn times drastically shorten to just 15 minutes. As fall approaches in September, the index decreases to 7 but remains a significant high-risk month, with burn time extending to 25 minutes. Moving into winter, both November and December see a return to moderate UV levels, with indices of 3 and 2 respectively, allowing for burn times of 30 to 45 minutes. Visitors and residents should take extra precautions from April to August, utilizing sunscreen, wearing protective clothing, and seeking shade during peak sun hours to mitigate the risks of overexposure.

Monthly Maximum UV Index for Granby, Canada

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Granby. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec245899887532
Data source: Statistical UV Index data for Granby, 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 Granby UV Index with Other Canada Cities

The table above highlights how UV exposure in Granby 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.
Granby's solar exposure compared to other cities in Canada. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Edmonton UVI235677876421
Calgary UVI234688987421
Montreal UVI245799887532
Ottawa UVI245899887532
Granby245899887532
Toronto UVI245899997532