Last updated: August 23, 2025
In December, the average temperature in Merimasku, Finland hovers around 1°C (33°F). Expect chilly conditions, as temperatures can drop to a minimum of -17°C (1°F) and rise to a maximum of 7°C (46°F). With an average humidity of 89%, the air will feel damp, and you might encounter precipitation totaling 80 mm (3.1 in) over approximately 15 days. Be prepared for a wet and cold month!
In December in Merimasku, the average temperature is 1°C (33°F). Maximums can reach 7°C (46°F) and minimums can be as low as -17°C (1°F). Travelers should be prepared for cold weather and layer their clothing to stay warm during their visit.
In Merimasku in December, the precipitation amount is 80 mm (3.1 in) over a span of 15 days.
In Merimasku in December, humidity is 89%. With an average temperature of 1°C (33°F), this humidity feels like a chilling mist that makes every step outside feel damp and uncomfortable, making travel quite challenging as the cold air clings to your skin.
In Merimasku 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 Merimasku.
UV Risk Categories
Weather in Merimasku varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Merimasku, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 47 mm (1.8 inches) | 92% | low |
| February Weather | -3°C (27°F) | 41 mm (1.6 inches) | 90% | low |
| March Weather | 0°C (32°F) | 43 mm (1.7 inches) | 89% | moderate |
| April Weather | 4°C (39°F) | 29 mm (1.1 inches) | 85% | moderate |
| May Weather | 9°C (49°F) | 38 mm (1.5 inches) | 77% | moderate |
| June Weather | 16°C (61°F) | 40 mm (1.6 inches) | 78% | high |
| July Weather | 18°C (65°F) | 58 mm (2.3 inches) | 78% | high |
| August Weather | 17°C (63°F) | 70 mm (2.7 inches) | 79% | moderate |
| September Weather | 13°C (55°F) | 67 mm (2.6 inches) | 86% | moderate |
| October Weather | 8°C (46°F) | 87 mm (3.4 inches) | 90% | low |
| November Weather | 4°C (40°F) | 59 mm (2.3 inches) | 91% | low |
| December Weather | 1°C (33°F) | 80 mm (3.1 inches) | 89% | low |