January Weather in Forssa, Finland

Last updated: August 23, 2025

In January, the average temperature in Forssa, Finland hovers around -3°C (26°F). Expect chills, with minimums plummeting to -26°C (-14°F) and maximums reaching a mild 8°C (46°F). With 50 mm (2.0 in) of precipitation spread across 11 days, don’t forget your umbrella! Humidity levels are high, averaging at 97%, adding an extra layer of crispness to the air.

January Temperature in Forssa

In January in Forssa, the average temperature is -3°C (26°F). The maximum can reach 8°C (46°F), while the minimum can drop as low as -26°C (-14°F). It's essential to prepare for a wide range of temperatures if you plan to travel during this time.

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

The chart illustrates January temperature patterns in Forssa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Forssa, January typically has an average temperature of -3°C (26°F), with highs reaching up to 8°C (46°F) and lows dropping to around -26°C (-14°F).

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

January Precipitation in Forssa

In Forssa in January, the precipitation amount is 50 mm (2.0 in) over the course of 11 days.

January Precipitation Trends in Forssa

The chart displays monthly precipitation patterns in Forssa, 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 Forssa, January typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Forssa

In Forssa in January humidity is 97%. With an average temperature of -3°C (26°F), this humidity feels like an icy blanket wrapped around you, making every breath feel heavy and damp, which can be quite challenging for traveling.

January Average Humidity in Forssa

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

In Forssa 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 Forssa.

Maximum UV Index Levels in Forssa for January

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

Data source: Forssa 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 Forssa Compares to Other Months

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

This table compares monthly weather conditions in Forssa, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	50 mm (2.0 inches)	97%	low
February Weather	-4°C (24°F)	45 mm (1.8 inches)	95%	low
March Weather	-1°C (30°F)	46 mm (1.8 inches)	93%	moderate
April Weather	3°C (38°F)	41 mm (1.6 inches)	86%	moderate
May Weather	10°C (50°F)	60 mm (2.4 inches)	75%	moderate
June Weather	16°C (61°F)	62 mm (2.4 inches)	75%	high
July Weather	17°C (64°F)	87 mm (3.4 inches)	80%	high
August Weather	16°C (61°F)	87 mm (3.4 inches)	83%	moderate
September Weather	11°C (52°F)	63 mm (2.5 inches)	90%	moderate
October Weather	6°C (43°F)	78 mm (3.1 inches)	93%	low
November Weather	2°C (36°F)	53 mm (2.1 inches)	94%	low
December Weather	-2°C (29°F)	67 mm (2.6 inches)	95%	low