December Weather in Sahalahti, Finland

Last updated: August 23, 2025

In December, the average temperature in Sahalahti, Finland hovers around -2°C (29°F), with minimums dipping to -19°C (-1°F) and maximums reaching a brisk 5°C (41°F). Expect about 66 mm (2.6 in) of precipitation spread over 13 days, coupled with a high average humidity of 95%. Prepare for a chilly and damp climate!

December Temperature in Sahalahti

In December in Sahalahti, the average temperature is -2°C (29°F), with maximums reaching 5°C (41°F) and minimums plummeting to -19°C (-1°F). Travelers should be prepared for chilly conditions and dress in layers to stay warm.

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

The chart illustrates December temperature patterns in Sahalahti, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sahalahti, December typically has an average temperature of -2°C (29°F), with highs reaching up to 5°C (41°F) and lows dropping to around -19°C (-1°F).

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

December Precipitation in Sahalahti

In Sahalahti in December, the total precipitation amount is 66 mm (2.6 in) spread over the course of 13 days.

December Precipitation Trends in Sahalahti

The chart displays monthly precipitation patterns in Sahalahti, 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 Sahalahti, December typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 13 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 Sahalahti

In Sahalahti in December, humidity is 95%. With an average temperature of -2°C (29°F), this humidity feels like a cold, damp chill that seeps into your bones, making outdoor travel uncomfortable and necessitating extra layers to stay warm and dry.

December Average Humidity in Sahalahti

This chart illustrates the average monthly humidity levels in Sahalahti, 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 Sahalahti is approximately 95%, 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 Sahalahti

In Sahalahti 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 Sahalahti.

Maximum UV Index Levels in Sahalahti for December

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

Data source: Sahalahti 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 Sahalahti Compares to Other Months

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

This table compares monthly weather conditions in Sahalahti, 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 (25°F)	47 mm (1.9 inches)	97%	low
February Weather	-5°C (23°F)	40 mm (1.6 inches)	95%	low
March Weather	-2°C (29°F)	42 mm (1.7 inches)	93%	moderate
April Weather	3°C (37°F)	42 mm (1.7 inches)	86%	moderate
May Weather	9°C (48°F)	58 mm (2.3 inches)	75%	moderate
June Weather	15°C (59°F)	68 mm (2.7 inches)	75%	high
July Weather	17°C (63°F)	76 mm (3.0 inches)	80%	high
August Weather	16°C (60°F)	85 mm (3.3 inches)	83%	moderate
September Weather	11°C (52°F)	69 mm (2.7 inches)	90%	moderate
October Weather	6°C (43°F)	82 mm (3.2 inches)	93%	low
November Weather	2°C (36°F)	58 mm (2.3 inches)	94%	low
December Weather	-2°C (29°F)	66 mm (2.6 inches)	95%	low