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September Weather in Sernio, Italy

Last updated: August 23, 2025

In September, the average temperature in Sernio, Italy hovers around 9°C (48°F), with minimums dipping to -10°C (14°F) and maximums reaching up to 20°C (69°F). Expect 111 mm (4.4 in) of precipitation over approximately 15 days, contributing to a notably high average humidity of 83%.

September Temperature in Sernio

In September in Sernio, the average temperature is 9°C (48°F). The maximum can reach 20°C (69°F) and the minimum can be as low as -10°C (14°F). This wide temperature range suggests that travelers should pack accordingly to enjoy the varied climate.

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

The chart illustrates September temperature patterns in Sernio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sernio, September typically has an average temperature of 9°C (48°F), with highs reaching up to 20°C (69°F) and lows dropping to around -10°C (14°F).
JanFebMarAprMayJunJulAugSepOctNovDec142127354353555548402918
Data source: Temperature data for Sernio 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 Sernio

In Sernio in September, the total precipitation amount is 111 mm (4.4 in) spread over 15 days.

September Precipitation Trends in Sernio

The chart displays monthly precipitation patterns in Sernio, 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 Sernio, September typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec455176101148132111130111138143112
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sernio

In Sernio in September humidity is 83%. With an average temperature of 9°C (48°F), this humidity feels like an enveloping blanket, making outdoor activities quite uncomfortable and encouraging travelers to seek shelter or shade frequently.

September Average Humidity in Sernio

This chart illustrates the average monthly humidity levels in Sernio, 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 Sernio is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%89%86%83%78%79%82%80%83%90%89%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sernio

In Sernio 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 Sernio.

Maximum UV Index Levels in Sernio for September

The chart shows the monthly maximum UV Index (UVI) for Sernio 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 Sernio typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec247810111198632
Data source: Sernio 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 Sernio Compares to Other Months

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

This table compares monthly weather conditions in Sernio, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (14°F)45 mm (1.8 inches)93%low
February Weather-6°C (22°F)51 mm (2.0 inches)89%moderate
March Weather-3°C (28°F)76 mm (3.0 inches)86%high
April Weather2°C (35°F)101 mm (4.0 inches)83%very high
May Weather6°C (44°F)148 mm (5.8 inches)78%very high
June Weather12°C (54°F)132 mm (5.2 inches)79%extreme
July Weather13°C (56°F)111 mm (4.4 inches)82%extreme
August Weather13°C (55°F)130 mm (5.1 inches)80%very high
September Weather9°C (48°F)111 mm (4.4 inches)83%very high
October Weather5°C (41°F)137 mm (5.4 inches)90%high
November Weather-2°C (29°F)143 mm (5.6 inches)89%moderate
December Weather-8°C (18°F)112 mm (4.4 inches)90%low

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