December Weather in Castiglione Olona, Italy

Last updated: August 23, 2025

In December, the average temperature in Castiglione Olona, Italy hovers around 5°C (41°F). Daily temperatures can vary significantly, with minimums dropping to -3°C (28°F) and maxima reaching up to 15°C (60°F). The region experiences about 94 mm (3.7 in) of precipitation over 8 days, accompanied by a notable average humidity of 85%.

December Temperature in Castiglione Olona

In December in Castiglione Olona, the average temperature is 5°C (41°F), with maximums reaching 15°C (60°F) and minimums dropping as low as -3°C (28°F). Be prepared for cool weather and pack layers to stay comfortable during your travels.

December Weather in Castiglione Olona: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Castiglione Olona, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castiglione Olona, December typically has an average temperature of 5°C (41°F), with highs reaching up to 15°C (60°F) and lows dropping to around -3°C (28°F).

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

December Precipitation in Castiglione Olona

In Castiglione Olona in December, the precipitation amount is 94 mm (3.7 in) over the course of 8 days.

December Precipitation Trends in Castiglione Olona

The chart displays monthly precipitation patterns in Castiglione Olona, 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 Castiglione Olona, December typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 8 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 Castiglione Olona

In Castiglione Olona in December, humidity is 85%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a challenge as the cold air clings to your skin.

December Average Humidity in Castiglione Olona

This chart illustrates the average monthly humidity levels in Castiglione Olona, 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 Castiglione Olona is approximately 85%, 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 Castiglione Olona

In Castiglione Olona in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Castiglione Olona, you can visit Hourly UV Index in Castiglione Olona.

Maximum UV Index Levels in Castiglione Olona for December

The chart shows the monthly maximum UV Index (UVI) for Castiglione Olona 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 Castiglione Olona typically reaches 2, which falls under the low exposure category.

Data source: Castiglione Olona 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 Castiglione Olona Compares to Other Months

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

This table compares monthly weather conditions in Castiglione Olona, 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 (40°F)	51 mm (2.0 inches)	88%	low
February Weather	7°C (44°F)	46 mm (1.8 inches)	81%	moderate
March Weather	9°C (49°F)	93 mm (3.7 inches)	76%	moderate
April Weather	13°C (56°F)	127 mm (5.0 inches)	77%	high
May Weather	17°C (63°F)	140 mm (5.5 inches)	74%	very high
June Weather	22°C (72°F)	155 mm (6.1 inches)	71%	very high
July Weather	24°C (75°F)	127 mm (5.0 inches)	67%	very high
August Weather	24°C (75°F)	108 mm (4.3 inches)	64%	very high
September Weather	19°C (67°F)	122 mm (4.8 inches)	74%	high
October Weather	14°C (58°F)	214 mm (8.4 inches)	87%	moderate
November Weather	9°C (49°F)	180 mm (7.1 inches)	88%	moderate
December Weather	5°C (41°F)	94 mm (3.7 inches)	85%	low