January Weather in Marttila, Finland

Last updated: August 23, 2025

In January, the average temperature in Marttila, Finland hovers around -3°C (28°F), with the minimum dipping as low as -25°C (-13°F) and the maximum reaching 8°C (47°F). Expect 50 mm (2.0 in) of precipitation over approximately 10 days during this chilly month, accompanied by a hefty average humidity of 97%.

January Temperature in Marttila

In January in Marttila, the average temperature is -3°C (28°F). The maximum can reach 8°C (47°F) and the minimum can be as low as -25°C (-13°F). Be sure to dress warmly and prepare for a range of temperatures if you're traveling during this time.

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

The chart illustrates January temperature patterns in Marttila, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marttila, January typically has an average temperature of -3°C (28°F), with highs reaching up to 8°C (47°F) and lows dropping to around -25°C (-13°F).

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

January Precipitation in Marttila

In Marttila in January, the precipitation amount is 50 mm (2.0 in) over a span of 10 days.

January Precipitation Trends in Marttila

The chart displays monthly precipitation patterns in Marttila, 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 Marttila, January typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 10 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 Marttila

In Marttila in January, humidity is 97%. With an average temperature of -3°C (28°F), this humidity feels like an icy blanket wrapping around you, making outdoor adventures challenging and travel uncomfortable, as each breath draws in a chill that seems to seep into your bones.

January Average Humidity in Marttila

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

In Marttila 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 Marttila.

Maximum UV Index Levels in Marttila for January

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

Data source: Marttila 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 Marttila Compares to Other Months

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

This table compares monthly weather conditions in Marttila, 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 (28°F)	50 mm (2.0 inches)	97%	low
February Weather	-4°C (25°F)	44 mm (1.7 inches)	95%	low
March Weather	-1°C (31°F)	47 mm (1.9 inches)	93%	moderate
April Weather	4°C (39°F)	38 mm (1.5 inches)	86%	moderate
May Weather	10°C (50°F)	55 mm (2.2 inches)	75%	moderate
June Weather	16°C (62°F)	51 mm (2.0 inches)	75%	high
July Weather	18°C (64°F)	78 mm (3.1 inches)	80%	high
August Weather	16°C (61°F)	89 mm (3.5 inches)	83%	moderate
September Weather	12°C (53°F)	58 mm (2.3 inches)	90%	moderate
October Weather	7°C (44°F)	76 mm (3.0 inches)	93%	low
November Weather	3°C (38°F)	53 mm (2.1 inches)	94%	low
December Weather	-1°C (30°F)	69 mm (2.7 inches)	95%	low