December Weather in Siikajoki, Finland

Last updated: August 23, 2025

In Siikajoki, Finland, the average temperature in December hovers around -3°C (27°F). During this chilly month, temperatures can dip as low as -19°C (-3°F), while occasionally peaking at a milder 5°C (40°F). Expect 52 mm (2.1 in) of precipitation spread over 13 days, accompanied by a notable average humidity of 98%. Bundle up and embrace the brisk air!

December Temperature in Siikajoki

In December in Siikajoki, the average temperature is -3°C (27°F), with maximums reaching 5°C (40°F) and minimums dropping as low as -19°C (-3°F). Expect chilly conditions, so be sure to pack warm clothing if you're planning to visit during this time.

December Weather in Siikajoki: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Siikajoki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siikajoki, December typically has an average temperature of -3°C (27°F), with highs reaching up to 5°C (40°F) and lows dropping to around -19°C (-3°F).

Data source: Temperature data for Siikajoki generated using information from the Copernicus Climate Change Service.

December Precipitation in Siikajoki

In Siikajoki in December, the precipitation amount is 52 mm (2.1 in) spread over 13 days.

December Precipitation Trends in Siikajoki

The chart displays monthly precipitation patterns in Siikajoki, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Siikajoki, December typically receives around 52 mm (2.1 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Siikajoki

In Siikajoki in December, humidity is 98%. With an average temperature of -3°C (27°F), this humidity feels like walking through a damp fog, making every breath feel heavier and the chill slice deeper into your bones, creating a uniquely uncomfortable travel experience.

December Average Humidity in Siikajoki

This chart illustrates the average monthly humidity levels in Siikajoki, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Siikajoki is approximately 98%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Siikajoki

In Siikajoki 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 Siikajoki.

Maximum UV Index Levels in Siikajoki for December

The chart shows the monthly maximum UV Index (UVI) for Siikajoki in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Siikajoki typically reaches 1, which falls under the low exposure category.

Data source: Siikajoki December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How December Weather in Siikajoki Compares to Other Months

Weather in Siikajoki varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Siikajoki, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Siikajoki, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	37 mm (1.4 inches)	99%	low
February Weather	-7°C (19°F)	37 mm (1.4 inches)	97%	low
March Weather	-4°C (25°F)	37 mm (1.4 inches)	93%	moderate
April Weather	0°C (33°F)	37 mm (1.5 inches)	86%	moderate
May Weather	7°C (44°F)	54 mm (2.1 inches)	80%	moderate
June Weather	13°C (57°F)	51 mm (2.0 inches)	76%	high
July Weather	17°C (62°F)	68 mm (2.7 inches)	79%	high
August Weather	15°C (59°F)	91 mm (3.6 inches)	83%	moderate
September Weather	10°C (51°F)	76 mm (3.0 inches)	89%	moderate
October Weather	5°C (41°F)	87 mm (3.4 inches)	94%	low
November Weather	1°C (33°F)	62 mm (2.4 inches)	94%	low
December Weather	-3°C (27°F)	52 mm (2.1 inches)	98%	low