January Weather in Siilinjaervi, Finland

Last updated: August 23, 2025

In January, the average temperature in Siilinjaervi, Finland hovers around -6°C (21°F). Conditions can swing from a frigid minimum of -30°C (-21°F) to a more bearable maximum of 6°C (43°F). Expect 49 mm (1.9 in) of precipitation spread over 13 days, while the average humidity remains a high 99%. Be prepared for a chilly and moist atmosphere!

January Temperature in Siilinjaervi

In January in Siilinjaervi, the average temperature is -6°C (21°F), with maximums reaching up to 6°C (43°F) and minimums dropping as low as -30°C (-21°F). This chilly weather makes it essential to bundle up and prepare for potentially extreme conditions, so travelers should ensure they have warm clothing and plan indoor activities.

January Weather in Siilinjaervi: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Siilinjaervi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siilinjaervi, January typically has an average temperature of -6°C (21°F), with highs reaching up to 6°C (43°F) and lows dropping to around -30°C (-21°F).

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

January Precipitation in Siilinjaervi

In Siilinjaervi in January, the precipitation amount is 49 mm (1.9 in) over the course of 13 days.

January Precipitation Trends in Siilinjaervi

The chart displays monthly precipitation patterns in Siilinjaervi, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Siilinjaervi, January typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 13 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Siilinjaervi

In Siilinjaervi in January humidity is 99%. With an average temperature of -6°C (21°F), this humidity feels like an icy blanket that clings to your skin, making every breath feel damp and biting, which can be quite uncomfortable for traveling.

January Average Humidity in Siilinjaervi

This chart illustrates the average monthly humidity levels in Siilinjaervi, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Siilinjaervi is approximately 99%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Siilinjaervi

In Siilinjaervi in January, 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 Siilinjaervi.

Maximum UV Index Levels in Siilinjaervi for January

The chart shows the monthly maximum UV Index (UVI) for Siilinjaervi in January, 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 January, the maximum UV index in Siilinjaervi typically reaches 1, which falls under the low exposure category.

Data source: Siilinjaervi January 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 January Weather in Siilinjaervi Compares to Other Months

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

This table compares monthly weather conditions in Siilinjaervi, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	49 mm (1.9 inches)	99%	low
February Weather	-7°C (19°F)	43 mm (1.7 inches)	98%	low
March Weather	-3°C (26°F)	43 mm (1.7 inches)	95%	moderate
April Weather	2°C (35°F)	42 mm (1.6 inches)	87%	moderate
May Weather	8°C (47°F)	56 mm (2.2 inches)	78%	moderate
June Weather	15°C (60°F)	66 mm (2.6 inches)	75%	high
July Weather	17°C (64°F)	84 mm (3.3 inches)	83%	high
August Weather	15°C (60°F)	103 mm (4.0 inches)	88%	moderate
September Weather	10°C (50°F)	91 mm (3.6 inches)	92%	moderate
October Weather	5°C (41°F)	84 mm (3.3 inches)	95%	low
November Weather	1°C (33°F)	77 mm (3.0 inches)	94%	low
December Weather	-4°C (25°F)	68 mm (2.7 inches)	98%	low