Last updated: August 23, 2025
In December, the average temperature in Alajaervi, Finland hovers around -3°C (26°F). Conditions can be quite variable, with temperatures dipping to a chilling -23°C (-9°F) and climbing up to a mild 5°C (41°F). Expect 49 mm (1.9 in) of precipitation spread over 12 days, contributing to an overall average humidity level of a damp 95%.
In December in Alajaervi, the average temperature is -3°C (26°F). Maximum temperatures can reach up to 5°C (41°F), while the minimum can drop as low as -23°C (-9°F). Travelers should be prepared for very cold conditions and dress in layers to ensure warmth and comfort during their stay.
In Alajaervi in December, the total precipitation amount is 49 mm (1.9 in) spread over 12 days.
In Alajaervi in December humidity is 95%. With an average temperature of -3°C (26°F), this humidity feels like a biting chill that seeps into your bones, making any outdoor activity uncomfortable and challenging for travelers.
In Alajaervi 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 Alajaervi.
UV Risk Categories
Weather in Alajaervi varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Alajaervi, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 40 mm (1.6 inches) | 97% | low |
| February Weather | -6°C (21°F) | 40 mm (1.6 inches) | 95% | low |
| March Weather | -2°C (28°F) | 42 mm (1.7 inches) | 92% | moderate |
| April Weather | 2°C (36°F) | 48 mm (1.9 inches) | 85% | moderate |
| May Weather | 9°C (48°F) | 63 mm (2.5 inches) | 77% | moderate |
| June Weather | 15°C (60°F) | 60 mm (2.3 inches) | 74% | high |
| July Weather | 17°C (62°F) | 65 mm (2.6 inches) | 79% | high |
| August Weather | 15°C (59°F) | 92 mm (3.6 inches) | 82% | moderate |
| September Weather | 10°C (50°F) | 74 mm (2.9 inches) | 89% | moderate |
| October Weather | 5°C (41°F) | 81 mm (3.2 inches) | 93% | low |
| November Weather | 1°C (33°F) | 61 mm (2.4 inches) | 93% | low |
| December Weather | -3°C (26°F) | 49 mm (1.9 inches) | 95% | low |