Last updated: August 22, 2025
In May, the average temperature in Sund, Åland Islands hovers around 8°C (47°F), with a minimum dipping to -1°C (31°F) and a maximum peaking at 20°C (69°F). Expect about 38 mm (1.5 in) of precipitation over 6 days, contributing to a rather humid atmosphere with an average humidity of 77%.
In May in Sund, the average temperature is 8°C (47°F), with maximums reaching 20°C (69°F) and minimums dropping to as low as -1°C (31°F). This mild and variable climate makes Sund a unique destination for travelers seeking diverse weather experiences.
In Sund in May, the total precipitation amount is 38 mm (1.5 in) spread over 6 days.
In Sund in May, humidity is 77%. With an average temperature of 8°C (47°F), this humidity feels like a damp chill that can make even short walks outside feel uncomfortable, often clinging to your skin and making you long for warmer, drier conditions.
In Sund in May, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Sund.
UV Risk Categories
Weather in Sund varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Sund, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 44 mm (1.7 inches) | 92% | low |
| February Weather | 0°C (32°F) | 34 mm (1.3 inches) | 90% | low |
| March Weather | 1°C (34°F) | 36 mm (1.4 inches) | 90% | moderate |
| April Weather | 4°C (39°F) | 25 mm (1.0 inches) | 85% | moderate |
| May Weather | 8°C (47°F) | 38 mm (1.5 inches) | 77% | moderate |
| June Weather | 15°C (58°F) | 30 mm (1.2 inches) | 76% | high |
| July Weather | 17°C (63°F) | 47 mm (1.9 inches) | 75% | high |
| August Weather | 17°C (63°F) | 56 mm (2.2 inches) | 78% | moderate |
| September Weather | 13°C (56°F) | 57 mm (2.3 inches) | 86% | moderate |
| October Weather | 9°C (48°F) | 87 mm (3.4 inches) | 90% | low |
| November Weather | 6°C (42°F) | 50 mm (2.0 inches) | 91% | low |
| December Weather | 2°C (36°F) | 71 mm (2.8 inches) | 90% | low |