January Weather in Castiglione Olona, Italy

Last updated: August 23, 2025

In January, the average temperature in Castiglione Olona, Italy hovers around 4°C (40°F). Expect minimums to dip as low as -5°C (23°F), while maximums can reach up to 17°C (62°F). This month also brings about 51 mm (2.0 in) of precipitation spread over 7 days, with an average humidity level of a high 88%.

January Temperature in Castiglione Olona

In January in Castiglione Olona, the average temperature is 4°C (40°F), with maximums reaching up to 17°C (62°F) and minimums dropping as low as -5°C (23°F). It's advisable to pack layers to stay comfortable in the fluctuating temperatures while exploring the area.

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

The chart illustrates January 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, January typically has an average temperature of 4°C (40°F), with highs reaching up to 17°C (62°F) and lows dropping to around -5°C (23°F).

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

January Precipitation in Castiglione Olona

In Castiglione Olona in January, the precipitation amount is 51 mm (2.0 in) over a period of 7 days.

January Precipitation Trends in Castiglione Olona

The chart displays monthly precipitation patterns in Castiglione Olona, 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 Castiglione Olona, January typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 7 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 Castiglione Olona

In Castiglione Olona in January, humidity is 88%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration less enjoyable and prompting you to seek cozy indoor activities instead.

January Average Humidity in Castiglione Olona

This chart illustrates the average monthly humidity levels in Castiglione Olona, 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 Castiglione Olona is approximately 88%, 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 Castiglione Olona

In Castiglione Olona in January, 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 January

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

Data source: Castiglione Olona 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 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 January’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 January’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