Last updated: August 23, 2025
In May, the average temperature in Posio, Finland hovers around 5°C (41°F), with temperatures ranging from a brisk -8°C (19°F) to a surprisingly warm 24°C (76°F). Expect about 49 mm (1.9 in) of precipitation spread over 10 days, contributing to an average humidity of 83%. Be prepared for a mix of weather, perfect for cozy indoor activities or brisk outdoor adventures!
In May in Posio, the average temperature is 5°C (41°F), with maximums reaching up to 24°C (76°F) and minimums dipping as low as -8°C (19°F). Travelers should prepare for a wide range of temperatures and pack accordingly for both warm days and chilly nights.
In Posio in May, the total precipitation amount is 49 mm (1.9 in) over the course of 10 days.
In Posio in May humidity is 83%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and necessitating extra layers to stay warm and dry.
In Posio 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 Posio.
UV Risk Categories
Weather in Posio varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Posio, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -10°C (14°F) | 43 mm (1.7 inches) | 101% | low |
February Weather | -10°C (14°F) | 40 mm (1.6 inches) | 99% | low |
March Weather | -6°C (21°F) | 44 mm (1.7 inches) | 94% | low |
April Weather | 0°C (32°F) | 43 mm (1.7 inches) | 88% | moderate |
May Weather | 5°C (41°F) | 49 mm (1.9 inches) | 83% | moderate |
June Weather | 12°C (55°F) | 85 mm (3.4 inches) | 79% | high |
July Weather | 15°C (60°F) | 76 mm (3.0 inches) | 83% | high |
August Weather | 12°C (55°F) | 110 mm (4.3 inches) | 87% | moderate |
September Weather | 7°C (46°F) | 82 mm (3.2 inches) | 91% | moderate |
October Weather | 2°C (35°F) | 82 mm (3.2 inches) | 96% | low |
November Weather | -3°C (27°F) | 71 mm (2.8 inches) | 96% | low |
December Weather | -7°C (20°F) | 58 mm (2.3 inches) | 100% | low |