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September Weather in Castelmassa, Italy

Last updated: August 23, 2025

In September, the average temperature in Castelmassa, Italy is a pleasant 21°C (70°F). While you can expect a minimum temperature of 9°C (48°F), it can soar to a maximum of 34°C (94°F) on warmer days. Be prepared for some rain, as the precipitation averages 121 mm (4.8 in) over 11 days. Lastly, humidity levels tend to hover around 66%, creating a comfortable atmosphere overall.

September Temperature in Castelmassa

In September in Castelmassa, the average temperature is 21°C (70°F). The maximum can reach 34°C (94°F) and the minimum can be as low as 9°C (48°F). This makes it a perfect time for travelers to enjoy a variety of outdoor activities while being prepared for varying temperatures.

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

The chart illustrates September temperature patterns in Castelmassa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castelmassa, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec394550586676797970615141
Data source: Temperature data for Castelmassa 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 Castelmassa

In Castelmassa in September, the total precipitation amount is 121 mm (4.8 in), which occurs over the course of 11 days.

September Precipitation Trends in Castelmassa

The chart displays monthly precipitation patterns in Castelmassa, 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 Castelmassa, September typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec2457507912066102871217311771
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Castelmassa

In Castelmassa in September humidity is 66%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making it comfortable for leisurely strolls but slightly sticky for longer excursions.

September Average Humidity in Castelmassa

This chart illustrates the average monthly humidity levels in Castelmassa, 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 Castelmassa is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%79%69%71%70%65%61%54%66%83%88%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Castelmassa

In Castelmassa 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 Castelmassa, you can refer to this Hourly UV Index in Castelmassa.

Maximum UV Index Levels in Castelmassa for September

The chart shows the monthly maximum UV Index (UVI) for Castelmassa 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 Castelmassa typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986532
Data source: Castelmassa 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 Castelmassa Compares to Other Months

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

This table compares monthly weather conditions in Castelmassa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)24 mm (0.9 inches)87%low
February Weather7°C (45°F)57 mm (2.2 inches)79%moderate
March Weather10°C (50°F)50 mm (2.0 inches)69%moderate
April Weather15°C (58°F)79 mm (3.1 inches)71%high
May Weather19°C (66°F)120 mm (4.7 inches)70%very high
June Weather24°C (76°F)65 mm (2.6 inches)65%very high
July Weather26°C (79°F)102 mm (4.0 inches)61%very high
August Weather26°C (80°F)87 mm (3.4 inches)54%very high
September Weather21°C (70°F)121 mm (4.8 inches)66%high
October Weather16°C (61°F)73 mm (2.9 inches)83%moderate
November Weather11°C (51°F)117 mm (4.6 inches)88%moderate
December Weather5°C (41°F)71 mm (2.8 inches)85%low

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