September Weather in Castelseprio, Italy

Last updated: August 23, 2025

In September, the average temperature in Castelseprio, Italy is a pleasant 19°C (67°F), with minimums dipping to 8°C (46°F) and maximums soaring to 29°C (85°F). Expect 122 mm (4.8 in) of precipitation spread over 11 days, contributing to a humidity level of 74%. Embrace the mild climate, whether you're exploring or relaxing!

September Temperature in Castelseprio

In September in Castelseprio, the average temperature is 19°C (67°F). Maximums can reach 29°C (85°F), and minimums can be as low as 8°C (46°F). This mild weather makes Castelseprio an ideal destination for travelers seeking a comfortable climate.

September Weather in Castelseprio: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Castelseprio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castelseprio, September typically has an average temperature of 19°C (67°F), with highs reaching up to 29°C (85°F) and lows dropping to around 8°C (46°F).

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

September Precipitation in Castelseprio

In Castelseprio in September, the total precipitation amount is 122 mm (4.8 in) over a span of 11 days.

September Precipitation Trends in Castelseprio

The chart displays monthly precipitation patterns in Castelseprio, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Castelseprio, September typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Castelseprio

In Castelseprio in September, humidity is 74%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling, often leading travelers to seek shade and hydrate frequently.

September Average Humidity in Castelseprio

This chart illustrates the average monthly humidity levels in Castelseprio, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Castelseprio is approximately 74%, offering insight into how humid the weather typically is during this month.

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

September UV Index in Castelseprio

In Castelseprio in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Castelseprio, you can refer to this Hourly UV Index in Castelseprio.

Maximum UV Index Levels in Castelseprio for September

The chart shows the monthly maximum UV Index (UVI) for Castelseprio in September, 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 September, the maximum UV index in Castelseprio typically reaches 6, which falls under the high exposure category.

Data source: Castelseprio September 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 September Weather in Castelseprio Compares to Other Months

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

This table compares monthly weather conditions in Castelseprio, showing how September’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