January Weather in Lammi, Finland

Last updated: August 23, 2025

In January, the average temperature in Lammi, Finland hovers around -4°C (25°F), with extremes ranging from a frigid -25°C (-13°F) to a milder 8°C (46°F). During this month, expect about 48 mm (1.9 in) of precipitation spread over 11 days, contributing to an average humidity of 97%.

January Temperature in Lammi

In January in Lammi, the average temperature is -4°C (25°F). The maximum can reach 8°C (46°F), while the minimum can drop as low as -25°C (-13°F). Travelers should prepare for cold temperatures and be equipped for potentially harsh winter conditions.

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

The chart illustrates January temperature patterns in Lammi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lammi, January typically has an average temperature of -4°C (25°F), with highs reaching up to 8°C (46°F) and lows dropping to around -25°C (-13°F).

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

January Precipitation in Lammi

In Lammi in January, the precipitation amount is 48 mm (1.9 in) over a span of 11 days.

January Precipitation Trends in Lammi

The chart displays monthly precipitation patterns in Lammi, 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 Lammi, January typically receives around 48 mm (1.9 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 Lammi

In Lammi in January, humidity is 97%. With an average temperature of -4°C (25°F), this humidity feels like a bite of frost in the air, making every breath feel heavy and icy, leaving travelers feeling chilled to the bone as they navigate through the damp surroundings.

January Average Humidity in Lammi

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

In Lammi 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 Lammi.

Maximum UV Index Levels in Lammi for January

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

Data source: Lammi 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 Lammi Compares to Other Months

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

This table compares monthly weather conditions in Lammi, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	48 mm (1.9 inches)	97%	low
February Weather	-5°C (24°F)	42 mm (1.7 inches)	95%	low
March Weather	-2°C (29°F)	44 mm (1.7 inches)	93%	moderate
April Weather	3°C (38°F)	47 mm (1.8 inches)	86%	moderate
May Weather	10°C (50°F)	58 mm (2.3 inches)	75%	moderate
June Weather	16°C (61°F)	69 mm (2.7 inches)	75%	high
July Weather	17°C (63°F)	83 mm (3.3 inches)	80%	high
August Weather	16°C (61°F)	81 mm (3.2 inches)	83%	moderate
September Weather	11°C (52°F)	67 mm (2.6 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 (28°F)	67 mm (2.6 inches)	95%	low