Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors of Härryda, Sweden, as it serves as a vital tool for sun safety and skin health. With peak UV levels reaching up to 5 during midday hours, awareness of these exposure risks is essential to prevent sunburn and long-term skin damage. Härryda's Dfc climate means that while summers can be mild, the sun's intensity can still pose a threat, making it important to check UV levels regularly. Stay informed and protect your skin by knowing when to seek shade or apply sunscreen!
The UV Index offers a fascinating glimpse into the sun's intensity throughout the day. Beginning at 7:00 AM, the index starts at a low level of 1, gradually climbing to 2 by 8:00 AM. By 9:00 AM, it reaches 3, and it maintains this level until 10:00 AM. The sun becomes more potent as it peaks at noon, hitting a maximum of 5, where it remains steady until 1:00 PM. As the afternoon progresses, the intensity starts to wane, dipping to 4 at 2:00 PM and again at 3:00 PM. The UV Index then decreases further to 3 at 4:00 PM, trailing off to 2 by 5:00 PM. As evening approaches, the index returns to its early morning levels, settling at a tranquil 1 by 6:00 PM and remaining there until twilight at 7:00 PM. This data underlines the importance of sun protection during peak hours, especially from noon to 1:00 PM, when the UV levels are at their highest.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 3 | moderate | 30 min |
| 11:00 | 4 | moderate | 30 min |
| 12:00 | 5 | moderate | 30 min |
| 13:00 | 5 | moderate | 30 min |
| 14:00 | 4 | moderate | 30 min |
| 15:00 | 4 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index fluctuates seasonally, reflecting changes in sun strength and associated risk levels throughout the year. January through March sees low UV levels (1-2) with a burn time of 45 minutes. As spring approaches, April and May experience an increase to moderate exposure (4-5), reducing burn time to 30 minutes. The risk peaks in June and July, where the UV Index reaches 6, categorizing it as high risk, with a burn time of just 25 minutes. This is followed by a slight decrease in August (UV Index 5) and September (UV Index 3), both retaining moderate exposure. By October to December, levels fall back to low (1-2), allowing for a safer burn time of 45 minutes. Visitors and residents should exercise caution and use sun protection during high-risk months (June and July), while maintaining awareness of changing UV levels throughout the year to minimize skin damage.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Haernoesand | 1 | 1 | 2 | 4 | 5 | 6 | 6 | 5 | 3 | 2 | 1 | 1 |
| Sollentuna UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Uppsala UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Stockholm UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Goeteborg UVI | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 6 | 5 | 2 | 1 | 1 |
| Malmoe UVI | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 6 | 5 | 3 | 1 | 1 |