Last updated: August 23, 2025
In May, the average temperature in Hailuoto, Finland hovers around 5°C (41°F), presenting a climate that's both brisk and refreshing. Temperatures can dip as low as -5°C (23°F), or soar to a maximum of 16°C (62°F), so dressing in layers is advisable. Expect about 52 mm (2.1 in) of precipitation over approximately 8 days, contributing to an overall average humidity of 80%. Be prepared for a mix of cool air and damp days!
In May in Hailuoto, the average temperature is 5°C (41°F), with maximums reaching up to 16°C (62°F) and minimums dipping as low as -5°C (23°F). It's advisable to pack accordingly for your travels, as temperatures can vary significantly throughout the day.
In Hailuoto in May, the total precipitation amount is 52 mm (2.1 in) over the course of 8 days.
In Hailuoto in May humidity is 80%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much colder than it actually is, leading to the necessity of layering up to stay comfortable while traveling.
In Hailuoto 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 Hailuoto.
UV Risk Categories
Weather in Hailuoto varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Hailuoto, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 40 mm (1.6 inches) | 99% | low |
| February Weather | -7°C (19°F) | 39 mm (1.5 inches) | 97% | low |
| March Weather | -4°C (24°F) | 38 mm (1.5 inches) | 93% | moderate |
| April Weather | -1°C (30°F) | 37 mm (1.4 inches) | 86% | moderate |
| May Weather | 5°C (41°F) | 52 mm (2.1 inches) | 80% | moderate |
| June Weather | 13°C (55°F) | 51 mm (2.0 inches) | 76% | high |
| July Weather | 17°C (62°F) | 63 mm (2.5 inches) | 79% | high |
| August Weather | 15°C (60°F) | 87 mm (3.4 inches) | 83% | moderate |
| September Weather | 11°C (52°F) | 84 mm (3.3 inches) | 89% | moderate |
| October Weather | 6°C (42°F) | 100 mm (4.0 inches) | 94% | low |
| November Weather | 1°C (35°F) | 70 mm (2.8 inches) | 94% | low |
| December Weather | -3°C (28°F) | 58 mm (2.3 inches) | 98% | low |