January Weather in Posio, Finland

Last updated: August 23, 2025

In January, the average temperature in Posio, Finland hovers around -10°C (14°F), with minimums dipping as low as -28°C (-18°F) and maximums reaching up to 3°C (38°F). Prepare for a chilly month, as precipitation averages 43 mm (1.7 in) spread over 11 days. Notably, the average humidity sits at a brisk 101%, making it a truly unique winter experience!

January Temperature in Posio

In January in Posio, the average temperature is -10°C (14°F). Maximums can reach 3°C (38°F), while minimums can drop as low as -28°C (-18°F). Be prepared for extreme cold conditions if you're planning to travel during this time.

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

The chart illustrates January temperature patterns in Posio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Posio, January typically has an average temperature of -10°C (14°F), with highs reaching up to 3°C (38°F) and lows dropping to around -28°C (-18°F).

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

January Precipitation in Posio

In Posio in January, the total precipitation amount is 43 mm (1.7 in) recorded over a span of 11 days.

January Precipitation Trends in Posio

The chart displays monthly precipitation patterns in Posio, 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 Posio, January typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 11 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 Posio

In Posio in January, humidity is 101%. With an average temperature of -10°C (14°F), this humidity feels like an icy blanket wrapping around you, making travel feel like trudging through a snowy sauna, where the cold air is heavy and each breath feels dense and crisp.

January Average Humidity in Posio

This chart illustrates the average monthly humidity levels in Posio, 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 Posio is approximately 101%, 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 Posio

In Posio 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 Posio.

Maximum UV Index Levels in Posio for January

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

Data source: Posio 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 Posio Compares to Other Months

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

This table compares monthly weather conditions in Posio, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (14°F)	43 mm (1.7 inches)	101%	low
February Weather	-10°C (14°F)	40 mm (1.6 inches)	99%	low
March Weather	-6°C (21°F)	44 mm (1.7 inches)	94%	low
April Weather	0°C (32°F)	43 mm (1.7 inches)	88%	moderate
May Weather	5°C (41°F)	49 mm (1.9 inches)	83%	moderate
June Weather	12°C (55°F)	85 mm (3.4 inches)	79%	high
July Weather	15°C (60°F)	76 mm (3.0 inches)	83%	high
August Weather	12°C (55°F)	110 mm (4.3 inches)	87%	moderate
September Weather	7°C (46°F)	82 mm (3.2 inches)	91%	moderate
October Weather	2°C (35°F)	82 mm (3.2 inches)	96%	low
November Weather	-3°C (27°F)	71 mm (2.8 inches)	96%	low
December Weather	-7°C (20°F)	58 mm (2.3 inches)	100%	low