UV Index in Houston, Canada

Last updated: July 2, 2025

Understanding the UV Index in Houston, Canada is crucial for protecting your skin and promoting overall health. With UV levels peaking at 8 during midday hours, awareness can help you prevent sunburn and long-term skin damage. Houston’s Dfc climate brings unique challenges, where even moderate sun exposure can lead to increased risks. By staying informed about UV levels, you can enjoy the beautiful outdoors while keeping your skin safe from harmful effects.

Hourly UV Index in Houston

From dawn to dusk, the UV Index displays a dynamic rise and fall throughout the day. At 7:00 AM, it starts off conservatively at 1, indicating minimal exposure risk. As the sun climbs higher, the index gradually increases, peaking at 8 between 1:00 PM and 2:00 PM—a time when sun protection is crucial. Following this zenith, the index begins to decline, dipping back to 4 by 5:00 PM, and finally settling at 1 again by 7:00 PM. If you're planning outdoor activities, keep an eye on the UV levels, particularly during midday when they reach their highest and most potent levels!

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
10:004moderate30 min
11:006high25 min
12:007high25 min
13:008very high15 min
14:008very high15 min
15:007high25 min
16:006high25 min
17:004moderate30 min
18:003moderate30 min
19:001low45 min

Monthly UV Index Trends in Houston

The UV Index exhibits notable seasonal fluctuations, with the highest levels occurring during the summer months. July is identified as the peak month, featuring a UV Index of 8, categorized as very high, where the burn time is reduced to just 15 minutes. Following closely are May and June with an index of 7, indicating a high risk of UV exposure. Visitors and residents should exercise increased caution from May to August, particularly in July, by seeking shade, wearing protective clothing, and applying sunscreen frequently. In contrast, the winter months, particularly January, February, November, and December, present a low UV exposure risk, allowing for more comfortable outdoor activities with less concern for skin damage. Always consider the UV Index when planning outdoor activities to ensure safety and health.

Monthly Maximum UV Index for Houston, Canada

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Houston. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec124577876321
Data source: Statistical UV Index data for Houston, 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 Houston UV Index with Other Canada Cities

The table above highlights how UV exposure in Houston 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.
Houston's solar exposure compared to other cities in Canada. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Houston124577876321
Edmonton UVI235677876421
Calgary UVI234688987421
Montreal UVI245799887532
Ottawa UVI245899887532
Toronto UVI245899997532