UV Index in Grono, Switzerland

Last updated: July 2, 2025

Understanding the UV Index in Grono, Switzerland, is essential for protecting your skin and overall health under the sun’s powerful rays. As the UV levels can soar to a maximum of 10 during the midday hours, it becomes crucial to be aware of these values to prevent sunburn and long-term skin damage. Grono’s Dfc climate brings a mix of seasonal changes, but during sunnier months, the risk for harmful UV exposure increases significantly. By monitoring the UV Index, residents and visitors can make informed decisions about sun protection, ensuring a safer and more enjoyable experience outdoors.

Hourly UV Index in Grono

The UV Index data reveals an intriguing pattern over the course of the day. Starting at 07:00 with a mild 1, the sun begins to assert its intensity. By 09:00, the index climbs to 3, signaling that it's time to pay attention to sun safety. The heat intensifies, peaking at 13:00 and 14:00 with a formidable 10, denoting a high risk of harm from unprotected sun exposure. However, as the day progresses, there's a gradual decline; 15:00 sees a 8, settling down to a gentle 3 by 18:00. As evening falls, the UV Index drops to 1 at 19:00, offering a welcome respite. This data illustrates the importance of sun protection during peak hours, particularly between 11:00 and 14:00, when UV exposure is at its highest.

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
12:009very high15 min
13:0010very high15 min
14:0010very high15 min
15:008very high15 min
16:006high25 min
17:004moderate30 min
18:003moderate30 min
19:001low45 min

Monthly UV Index Trends in Grono

Throughout the year, the UV Index shows significant seasonal variations, indicating changes in the sun's intensity. January and December have the lowest UV levels (2), categorized as low exposure, allowing for longer burn times of up to 45 minutes. However, as we transition into February and March, the index rises to moderate (4) and high (6) categories, respectively, with reduced burn times of 30 and 25 minutes. The most critical months for sun exposure are from April to August, where the UV Index reaches its peak at 10 during June and July, classified as very high exposure with a rapid burn time of just 15 minutes. The UV levels then gradually decrease in September to high (7) and back to moderate levels in October and November. Visitors and residents are advised to take extra precautions during the high-risk months of April to August, by wearing protective clothing, applying sunscreen frequently, and minimizing sun exposure during peak hours.

Monthly Maximum UV Index for Grono, Switzerland

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Grono. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec24689101097532
Data source: Statistical UV Index data for Grono, 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 Grono UV Index with Other Switzerland Cities

The table above highlights how UV exposure in Grono compares to other major locations across Switzerland. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Grono's solar exposure compared to other cities in Switzerland. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Basel UVI235689986421
Bern UVI235689986422
Zurich UVI235689986432
Geneve UVI2367810987532
Lausanne UVI2467810997532
Grono24689101097532