December Weather in Sysmae, Finland

Last updated: August 23, 2025

In Sysmae, Finland, the average temperature in December hovers around -2°C (28°F), with potential lows dipping to a chilling -21°C (-5°F) and highs reaching up to 5°C (41°F). Expect precipitation to total 68 mm (2.7 in) over about 14 days of the month, accompanied by a high average humidity of 96%.

December Temperature in Sysmae

In December in Sysmae, the average temperature is -2°C (28°F), with a maximum reaching 5°C (41°F) and a minimum dipping as low as -21°C (-5°F). Visitors should be well-prepared for cold weather conditions and pack accordingly to fully enjoy their trip.

December Weather in Sysmae: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Sysmae, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sysmae, December typically has an average temperature of -2°C (28°F), with highs reaching up to 5°C (41°F) and lows dropping to around -21°C (-5°F).

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

December Precipitation in Sysmae

In Sysmae in December, the precipitation amount is 68 mm (2.7 in) distributed over a period of 14 days.

December Precipitation Trends in Sysmae

The chart displays monthly precipitation patterns in Sysmae, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Sysmae, December typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 14 days.

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

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Millimeters (mm) Inches (in)

December Humidity in Sysmae

In Sysmae in December humidity is 96%. With an average temperature of -2°C (28°F), this humidity feels like a suffocating blanket draped over you, making each breath feel heavy and cold, which can be quite challenging for traveling.

December Average Humidity in Sysmae

This chart illustrates the average monthly humidity levels in Sysmae, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Sysmae is approximately 96%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sysmae

In Sysmae in December, 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 Sysmae.

Maximum UV Index Levels in Sysmae for December

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

Data source: Sysmae December 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 December Weather in Sysmae Compares to Other Months

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

This table compares monthly weather conditions in Sysmae, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (24°F)	46 mm (1.8 inches)	98%	low
February Weather	-5°C (23°F)	42 mm (1.7 inches)	96%	low
March Weather	-2°C (29°F)	42 mm (1.7 inches)	93%	moderate
April Weather	3°C (37°F)	45 mm (1.8 inches)	87%	moderate
May Weather	9°C (48°F)	57 mm (2.2 inches)	75%	moderate
June Weather	15°C (60°F)	62 mm (2.5 inches)	74%	high
July Weather	17°C (63°F)	77 mm (3.0 inches)	80%	high
August Weather	16°C (61°F)	89 mm (3.5 inches)	85%	moderate
September Weather	11°C (52°F)	67 mm (2.6 inches)	90%	moderate
October Weather	6°C (43°F)	79 mm (3.1 inches)	94%	low
November Weather	2°C (36°F)	56 mm (2.2 inches)	94%	low
December Weather	-2°C (28°F)	68 mm (2.7 inches)	96%	low