January Weather in Reisjaervi, Finland

Last updated: August 23, 2025

In January, the average temperature in Reisjaervi, Finland hovers around -6°C (21°F). While it can dip as low as -29°C (-20°F), temperatures can also reach a maximum of 6°C (44°F). Expect about 40 mm (1.6 in) of precipitation over 11 days, accompanied by a high average humidity of 97%.

January Temperature in Reisjaervi

In January in Reisjaervi, the average temperature is -6°C (21°F). The maximum can reach 6°C (44°F), while the minimum can drop to as low as -29°C (-20°F). Travelers should be prepared for cold conditions and pack appropriate winter clothing to stay warm during their visit.

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

The chart illustrates January temperature patterns in Reisjaervi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Reisjaervi, January typically has an average temperature of -6°C (21°F), with highs reaching up to 6°C (44°F) and lows dropping to around -29°C (-20°F).

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

January Precipitation in Reisjaervi

In Reisjaervi in January, the precipitation amount is 40 mm (1.6 in) spread over a duration of 11 days.

January Precipitation Trends in Reisjaervi

The chart displays monthly precipitation patterns in Reisjaervi, 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 Reisjaervi, January typically receives around 40 mm (1.6 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 Reisjaervi

In Reisjaervi in January, humidity is 97%. With an average temperature of -6°C (21°F), this humidity feels like an icy blanket enveloping you, making travel particularly challenging as the cold clings to your skin and dampens even the most spirited adventures.

January Average Humidity in Reisjaervi

This chart illustrates the average monthly humidity levels in Reisjaervi, 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 Reisjaervi is approximately 97%, 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 Reisjaervi

In Reisjaervi 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 Reisjaervi.

Maximum UV Index Levels in Reisjaervi for January

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

Data source: Reisjaervi 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 Reisjaervi Compares to Other Months

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

This table compares monthly weather conditions in Reisjaervi, 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)	40 mm (1.6 inches)	97%	low
February Weather	-7°C (20°F)	40 mm (1.6 inches)	95%	low
March Weather	-3°C (27°F)	39 mm (1.5 inches)	92%	low
April Weather	2°C (36°F)	44 mm (1.7 inches)	85%	moderate
May Weather	8°C (47°F)	62 mm (2.4 inches)	77%	moderate
June Weather	15°C (59°F)	56 mm (2.2 inches)	74%	high
July Weather	16°C (62°F)	77 mm (3.0 inches)	79%	high
August Weather	14°C (58°F)	90 mm (3.5 inches)	82%	moderate
September Weather	9°C (49°F)	78 mm (3.1 inches)	89%	moderate
October Weather	4°C (39°F)	85 mm (3.4 inches)	93%	low
November Weather	0°C (32°F)	63 mm (2.5 inches)	93%	low
December Weather	-4°C (25°F)	51 mm (2.0 inches)	95%	low