December Weather in Jaerna, Sweden

Last updated: August 27, 2025

In December, the average temperature in Jaerna, Sweden hovers around -3°C (27°F), with nighttime lows dipping to a frigid -18°C (0°F) and daytime highs reaching a maximum of 7°C (45°F). Expect 62 mm (2.5 in) of precipitation over about 14 days, combined with an average humidity of 96%, creating a notably chilly and damp atmosphere.

December Temperature in Jaerna

In December in Jaerna, the average temperature is -3°C (27°F). Maximums can reach 7°C (45°F), while minimums can drop to as low as -18°C (0°F). Travelers should be prepared for cold conditions and dress warmly when visiting during this time.

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

The chart illustrates December temperature patterns in Jaerna, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jaerna, December typically has an average temperature of -3°C (27°F), with highs reaching up to 7°C (45°F) and lows dropping to around -18°C (0°F).

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

December Precipitation in Jaerna

In Jaerna in December, the precipitation amount is 62 mm (2.5 in) over the course of 14 days.

December Precipitation Trends in Jaerna

The chart displays monthly precipitation patterns in Jaerna, 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 Jaerna, December typically receives around 62 mm (2.5 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 Jaerna

In Jaerna in December humidity is 96%. With an average temperature of -3°C (27°F), this humidity feels like a biting cold that penetrates your clothes, making travel uncomfortable as the dampness clings to your skin and leaves you feeling chilled to the bone.

December Average Humidity in Jaerna

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

In Jaerna 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 Jaerna.

Maximum UV Index Levels in Jaerna for December

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

Data source: Jaerna 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 Jaerna Compares to Other Months

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

This table compares monthly weather conditions in Jaerna, 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 (26°F)	43 mm (1.7 inches)	97%	low
February Weather	-3°C (26°F)	42 mm (1.6 inches)	94%	low
March Weather	-1°C (31°F)	44 mm (1.7 inches)	91%	moderate
April Weather	4°C (39°F)	35 mm (1.4 inches)	85%	moderate
May Weather	9°C (49°F)	69 mm (2.7 inches)	77%	moderate
June Weather	15°C (60°F)	80 mm (3.2 inches)	76%	high
July Weather	16°C (61°F)	84 mm (3.3 inches)	74%	high
August Weather	14°C (58°F)	96 mm (3.8 inches)	80%	moderate
September Weather	10°C (51°F)	69 mm (2.7 inches)	88%	moderate
October Weather	5°C (42°F)	92 mm (3.6 inches)	93%	low
November Weather	1°C (34°F)	62 mm (2.4 inches)	96%	low
December Weather	-3°C (27°F)	62 mm (2.5 inches)	96%	low