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September Weather in Castelliri, Italy

Last updated: August 23, 2025

In September, the average temperature in Castelliri, Italy is a comfortable 18°C (64°F). However, temperatures can swing between a cool 4°C (39°F) and a warm 29°C (85°F). Expect about 108 mm (4.3 in) of precipitation over 10 days, coupled with an average humidity of 65%. Whether you're enjoying the mild weather or preparing for some rain, it's an ideal time to experience all that this charming destination has to offer!

September Temperature in Castelliri

In September in Castelliri, the average temperature is 18°C (64°F). Maximum temperatures can reach 29°C (85°F), while minimums can drop to as low as 4°C (39°F). This makes Castelliri an ideal destination for travelers seeking a mix of warm and cool weather during their visit.

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

The chart illustrates September temperature patterns in Castelliri, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castelliri, September typically has an average temperature of 18°C (64°F), with highs reaching up to 29°C (85°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec374144505767727364554840
Data source: Temperature data for Castelliri generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Castelliri

In Castelliri in September, the total precipitation amount is 108 mm (4.3 in) spread over a duration of 10 days.

September Precipitation Trends in Castelliri

The chart displays monthly precipitation patterns in Castelliri, 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 Castelliri, September typically receives around 108 mm (4.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec86117113103114725045108125230205
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Castelliri

In Castelliri in September, humidity is 65%. With an average temperature of 18°C (64°F), this humidity feels like a slightly muggy embrace, making outdoor exploration enjoyable but requiring a light jacket and frequent hydration breaks.

September Average Humidity in Castelliri

This chart illustrates the average monthly humidity levels in Castelliri, 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 Castelliri is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%76%69%70%70%61%57%53%65%75%82%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Castelliri

In Castelliri in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Castelliri.

Maximum UV Index Levels in Castelliri for September

The chart shows the monthly maximum UV Index (UVI) for Castelliri 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 Castelliri typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098642
Data source: Castelliri 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 Castelliri Compares to Other Months

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

This table compares monthly weather conditions in Castelliri, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)86 mm (3.4 inches)84%moderate
February Weather5°C (42°F)117 mm (4.6 inches)76%moderate
March Weather7°C (44°F)113 mm (4.5 inches)69%high
April Weather10°C (51°F)103 mm (4.1 inches)70%very high
May Weather14°C (58°F)114 mm (4.5 inches)70%very high
June Weather19°C (67°F)72 mm (2.8 inches)61%very high
July Weather22°C (72°F)50 mm (2.0 inches)57%very high
August Weather23°C (73°F)45 mm (1.8 inches)53%very high
September Weather18°C (64°F)108 mm (4.3 inches)65%very high
October Weather13°C (55°F)125 mm (4.9 inches)75%high
November Weather9°C (48°F)230 mm (9.0 inches)81%moderate
December Weather5°C (40°F)205 mm (8.1 inches)84%low

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