Last updated: August 23, 2025
In December, the average temperature in Nykarleby, Finland hovers around -2°C (29°F). Visitors should prepare for a chilly experience, with minimum temperatures dropping to -22°C (-8°F) and occasionally reaching a maximum of 6°C (42°F). Expect some drizzle, as precipitation typically amounts to 47 mm (1.9 in) over approximately 12 days. With an average humidity of 93%, it’s a wonderfully crisp atmosphere—perfect for enjoying the winter landscape!
In December in Nykarleby, the average temperature is -2°C (29°F), with maximums reaching up to 6°C (42°F) and minimums dropping as low as -22°C (-8°F). Be prepared for cold conditions and pack warm clothing if you plan to travel during this time.
In Nykarleby in December, the total precipitation amount reaches 47 mm (1.9 in) over the course of 12 days.
In Nykarleby in December humidity is 93%. With an average temperature of -2°C (29°F), this humidity feels like a dense, frosty blanket that clings to you, making the cold seep into your bones and transforming outdoor activities into a chilly challenge.
In Nykarleby 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 Nykarleby.
UV Risk Categories
Weather in Nykarleby varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Nykarleby, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 36 mm (1.4 inches) | 95% | low |
| February Weather | -5°C (23°F) | 40 mm (1.6 inches) | 93% | low |
| March Weather | -2°C (29°F) | 40 mm (1.6 inches) | 91% | moderate |
| April Weather | 2°C (37°F) | 40 mm (1.6 inches) | 85% | moderate |
| May Weather | 8°C (47°F) | 48 mm (1.9 inches) | 77% | moderate |
| June Weather | 15°C (59°F) | 51 mm (2.0 inches) | 74% | high |
| July Weather | 17°C (63°F) | 63 mm (2.5 inches) | 80% | high |
| August Weather | 15°C (60°F) | 82 mm (3.2 inches) | 82% | moderate |
| September Weather | 11°C (51°F) | 71 mm (2.8 inches) | 88% | moderate |
| October Weather | 6°C (42°F) | 83 mm (3.2 inches) | 92% | low |
| November Weather | 1°C (35°F) | 57 mm (2.2 inches) | 92% | low |
| December Weather | -2°C (29°F) | 47 mm (1.9 inches) | 93% | low |