Last updated: May 3, 2025
In Tonstad, Norway, being aware of the UV Index is essential for protecting your skin and overall health. Understanding UV levels helps residents and visitors alike take necessary precautions against sunburn and long-term skin damage, especially during peak hours when UV radiation is most intense. With Tonstad's Dfc climate, characterized by cool summers, the sun's rays can catch many off guard, making it crucial to monitor UV exposure. From the mild levels in the early morning to peaks of 6 during midday, staying informed about the UV Index can help ensure safe and enjoyable outdoor activities year-round.
As the sun rises, the UV Index starts low at 1 during the early hours, indicating minimal risk of harm from unprotected sun exposure. However, by 10:00 AM, it begins to climb, peaking at 6 around 1:00 PM and 2:00 PM, when the sun is at its strongest and protective measures are crucial. The intensity tapers off in the afternoon, dropping to 5 at 3:00 PM and settling at 2 by 6:00 PM, reminding us that while the midday sun presents the highest risk, later hours still warrant caution. Enjoying the outdoors is delightful, but remember to stay sun-smart throughout the day!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 3 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 5 | moderate | 30 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 6 | high | 25 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, seasonal UV Index changes indicate varying levels of sun exposure risk. In the low-risk months of January, February, October, November, and December, the UV Index remains between 1 and 2, allowing for a safer burn time of 45 minutes. As spring approaches, March sees a moderate UV Index of 3, reducing safe exposure to 30 minutes. The high-risk months of May through August, with UV Index values between 6 and 7, demand more caution as burn times drop to 25 minutes. September transitions back to moderate levels, while the cycle returns to low risk by October. Visitors and residents are advised to monitor UV Index changes, especially during high-risk months, by applying sunscreen, wearing protective clothing, and seeking shade to minimize skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Trondheim UVI | 1 | 1 | 2 | 4 | 5 | 6 | 6 | 5 | 3 | 2 | 1 | 1 |
| Bergen UVI | 1 | 1 | 3 | 4 | 5 | 7 | 6 | 5 | 4 | 2 | 1 | 1 |
| Oslo UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Drammen UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Stavanger UVI | 1 | 1 | 3 | 4 | 6 | 7 | 6 | 5 | 4 | 2 | 1 | 1 |
| Tonstad | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 6 | 4 | 2 | 1 | 1 |