Last updated: August 23, 2025
In December, the average temperature in Oulainen, Finland hovers around -4°C (25°F), with extremes ranging from a chilly -22°C (-8°F) to a milder 5°C (41°F). Expect approximately 50 mm (2.0 in) of precipitation spread over 12 days, contributing to an average humidity of 98%. Brace yourself for a truly wintry atmosphere!
In December in Oulainen, the average temperature is -4°C (25°F), with a maximum reaching 5°C (41°F) and a minimum plummeting to -22°C (-8°F). Be prepared for extremely cold conditions and dress warmly if you plan to travel during this time.
In Oulainen in December, the precipitation amount is 50 mm (2.0 in), occurring over the course of 12 days.
In Oulainen in December humidity is 98%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that clings to your skin, making every step feel more laborious as you navigate through the frosty air, dampening your spirits as well as your clothes.
In Oulainen in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Oulainen.
UV Risk Categories
Weather in Oulainen varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Oulainen, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 38 mm (1.5 inches) | 99% | low |
| February Weather | -7°C (19°F) | 39 mm (1.5 inches) | 97% | low |
| March Weather | -3°C (27°F) | 38 mm (1.5 inches) | 93% | low |
| April Weather | 2°C (35°F) | 40 mm (1.6 inches) | 86% | moderate |
| May Weather | 8°C (47°F) | 59 mm (2.3 inches) | 80% | moderate |
| June Weather | 15°C (59°F) | 57 mm (2.3 inches) | 76% | high |
| July Weather | 17°C (63°F) | 74 mm (2.9 inches) | 79% | high |
| August Weather | 14°C (58°F) | 93 mm (3.7 inches) | 83% | moderate |
| September Weather | 9°C (49°F) | 76 mm (3.0 inches) | 89% | moderate |
| October Weather | 4°C (40°F) | 83 mm (3.3 inches) | 94% | low |
| November Weather | 0°C (32°F) | 61 mm (2.4 inches) | 94% | low |
| December Weather | -4°C (25°F) | 50 mm (2.0 inches) | 98% | low |