Last updated: August 23, 2025
In December, the average temperature in Kajaani, Finland hovers around -5°C (23°F), with minimums dipping to -21°C (-6°F) and highs reaching up to 3°C (38°F). Expect 16 days of precipitation, totaling around 59 mm (2.3 in), and brace yourself for high humidity levels at a staggering 100%!
In December in Kajaani, the average temperature is -5°C (23°F), with maximums reaching 3°C (38°F) and minimums dropping as low as -21°C (-6°F). Travelers should be prepared for extremely cold weather and plan accordingly to ensure a comfortable experience.
In Kajaani in December, the precipitation amount is 59 mm (2.3 in) and falls over the course of 16 days.
In Kajaani in December, humidity is 100%. With an average temperature of -5°C (23°F), this humidity feels like a heavy, frigid blanket enveloping you, making each breath feel cold and damp, and leaving your skin clammy as you navigate the icy landscape.
In Kajaani 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 Kajaani.
UV Risk Categories
Weather in Kajaani varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Kajaani, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (18°F) | 45 mm (1.8 inches) | 101% | low |
| February Weather | -8°C (17°F) | 41 mm (1.6 inches) | 99% | low |
| March Weather | -4°C (24°F) | 45 mm (1.8 inches) | 94% | low |
| April Weather | 1°C (34°F) | 42 mm (1.6 inches) | 88% | moderate |
| May Weather | 7°C (44°F) | 55 mm (2.2 inches) | 83% | moderate |
| June Weather | 14°C (58°F) | 71 mm (2.8 inches) | 79% | high |
| July Weather | 16°C (61°F) | 94 mm (3.7 inches) | 83% | high |
| August Weather | 14°C (58°F) | 99 mm (3.9 inches) | 87% | moderate |
| September Weather | 9°C (48°F) | 83 mm (3.2 inches) | 91% | moderate |
| October Weather | 4°C (39°F) | 86 mm (3.4 inches) | 96% | low |
| November Weather | -1°C (30°F) | 75 mm (2.9 inches) | 96% | low |
| December Weather | -5°C (23°F) | 59 mm (2.3 inches) | 100% | low |