UV Index in Castelo Branco, Portugal

Last updated: July 2, 2025

In Castelo Branco, Portugal, being aware of the UV Index is essential for safeguarding your skin against harmful solar radiation. Understanding UV levels not only helps in preventing painful sunburn but also plays a vital role in promoting long-term skin health. With its Cfb climate, characterized by warm summers, residents and visitors alike should remain vigilant, especially during peak hours when the UV Index peaks at a high of 10 around noon. Being informed about UV exposure risks allows you to enjoy the beautiful sunshine of Castelo Branco while effectively protecting yourself!

Hourly UV Index in Castelo Branco

The UV Index data reveals a dynamic sun exposure pattern throughout the day. Starting with a low index of 1 in the early hours (07:00 and 08:00), sun sensitivity increases as the day progresses. By 09:00, the index rises to 2, marking the beginning of heightened UV intensity. The peak occurs between 12:00 and 14:00, where it hits a high of 10, indicating a strong need for sun protection. As the afternoon wanes, the levels gradually decline, sliding to 8 at 16:00 and further down to 3 by 18:00. By 19:00, the exposure reduces to 2, suggesting a safe transition as daylight fades. Remember, when the UV Index is 6 or higher, it’s essential to take protective measures!

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
09:002low45 min
10:004moderate30 min
11:006high25 min
12:008very high15 min
13:0010very high15 min
14:0010very high15 min
15:0010very high15 min
16:008very high15 min
17:006high25 min
18:003moderate30 min
19:002low45 min

Monthly UV Index Trends in Castelo Branco

As the seasons change, so do the UV index levels, with highest risks typically occurring from April to September. During these months, especially in June when the UV index reaches an extreme level of 11, the burn time is as short as 10 minutes. Visitors and residents should be particularly vigilant during this period, taking necessary precautions such as applying sunscreen with a high SPF, wearing protective clothing, and limiting sun exposure during peak hours. Conversely, during the winter months from January to March, the UV levels are substantially lower, categorized as moderate to high, allowing for safer outdoor activities with burn times ranging from 25 to 30 minutes. It’s crucial to remain aware of these seasonal changes to protect skin health throughout the year.

Monthly Maximum UV Index for Castelo Branco, Portugal

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Castelo Branco. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110109643
Data source: Statistical UV Index data for Castelo Branco, 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 Castelo Branco UV Index with Other Portugal Cities

The table above highlights how UV exposure in Castelo Branco compares to other major locations across Portugal. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Castelo Branco's solar exposure compared to other cities in Portugal. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Braga UVI24689111098642
Porto UVI24689111098642
Amadora UVI356910111098643
Lisbon UVI356910111098643
Setubal UVI356910111098643
Castelo Branco3579101110109743