Last updated: August 23, 2025
In Merijaervi, Finland, the average temperature in December hovers around -4°C (25°F). Expect chilly days, with minimum temperatures plunging to -23°C (-9°F) and a maximum reaching up to 5°C (42°F). Precipitation is moderate, averaging 49 mm (1.9 in) over 12 days of the month, contributing to a notably high average humidity of 98%. Embrace the crisp winter atmosphere!
In December in Merijaervi, the average temperature is -4°C (25°F). The maximum can reach 5°C (42°F), while the minimum can dip as low as -23°C (-9°F). Travelers should prepare for a chilly experience, with potential for both mild and severe cold conditions.
In Merijaervi in December, the total precipitation amount is 49 mm (1.9 in) spread over 12 days.
In Merijaervi 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 Merijaervi 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 Merijaervi.
UV Risk Categories
Weather in Merijaervi varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Merijaervi, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 37 mm (1.4 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% | moderate |
| April Weather | 2°C (36°F) | 40 mm (1.6 inches) | 86% | moderate |
| May Weather | 8°C (47°F) | 57 mm (2.2 inches) | 80% | moderate |
| June Weather | 15°C (59°F) | 60 mm (2.3 inches) | 76% | high |
| July Weather | 17°C (63°F) | 75 mm (3.0 inches) | 79% | high |
| August Weather | 15°C (58°F) | 96 mm (3.8 inches) | 83% | moderate |
| September Weather | 10°C (50°F) | 77 mm (3.0 inches) | 89% | moderate |
| October Weather | 4°C (40°F) | 82 mm (3.2 inches) | 94% | low |
| November Weather | 0°C (32°F) | 60 mm (2.4 inches) | 94% | low |
| December Weather | -4°C (25°F) | 49 mm (1.9 inches) | 98% | low |