January Weather in Heinaevesi, Finland

Last updated: August 23, 2025

In January, the average temperature in Heinaevesi, Finland hovers around -6°C (21°F). However, don't be deceived by the mild average, as temperatures can plummet to a chilling -28°C (-19°F) and occasionally peak at a brisk 6°C (43°F). Expect precipitation to reach about 49 mm (1.9 in) spread across 12 days, contributing to an impressive average humidity of 99%. Be sure to bundle up if you plan to visit!

January Temperature in Heinaevesi

In January, in Heinaevesi, the average temperature is -6°C (21°F). The maximum can reach 6°C (43°F), while the minimum can drop as low as -28°C (-19°F). Be prepared for extremely cold weather and pack plenty of warm clothing if you plan to travel during this time.

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

The chart illustrates January temperature patterns in Heinaevesi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Heinaevesi, 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 -28°C (-19°F).

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

January Precipitation in Heinaevesi

In Heinaevesi in January, the total precipitation amount is 49 mm (1.9 in) spread over 12 days.

January Precipitation Trends in Heinaevesi

The chart displays monthly precipitation patterns in Heinaevesi, 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 Heinaevesi, January typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 12 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 Heinaevesi

In Heinaevesi 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 Heinaevesi

This chart illustrates the average monthly humidity levels in Heinaevesi, 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 Heinaevesi 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 Heinaevesi

In Heinaevesi 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 Heinaevesi.

Maximum UV Index Levels in Heinaevesi for January

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

Data source: Heinaevesi 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 Heinaevesi Compares to Other Months

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

This table compares monthly weather conditions in Heinaevesi, 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 (20°F)	44 mm (1.7 inches)	98%	low
March Weather	-3°C (27°F)	47 mm (1.8 inches)	95%	moderate
April Weather	2°C (35°F)	43 mm (1.7 inches)	87%	moderate
May Weather	9°C (48°F)	61 mm (2.4 inches)	78%	moderate
June Weather	16°C (61°F)	67 mm (2.6 inches)	75%	high
July Weather	17°C (63°F)	81 mm (3.2 inches)	83%	high
August Weather	15°C (60°F)	87 mm (3.4 inches)	88%	moderate
September Weather	10°C (50°F)	85 mm (3.4 inches)	92%	moderate
October Weather	5°C (41°F)	79 mm (3.1 inches)	95%	low
November Weather	1°C (33°F)	64 mm (2.5 inches)	94%	low
December Weather	-4°C (25°F)	70 mm (2.7 inches)	98%	low