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September Weather in Alto, Italy

Last updated: August 23, 2025

In Alto, Italy, the average temperature in September hovers around 19°C (66°F), with a minimum falling to 9°C (49°F) and a maximum reaching 27°C (81°F). Expect 81 mm (3.2 in) of precipitation spread over approximately 12 days, contributing to an average humidity of 70% for a pleasant yet slightly damp experience.

September Temperature in Alto

In September in Alto, the average temperature is 19°C (66°F), with maximums reaching 27°C (81°F) and minimums dropping to as low as 9°C (49°F). This mild climate makes Alto an ideal destination for outdoor activities and exploring the local attractions.

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

The chart illustrates September temperature patterns in Alto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alto, September typically has an average temperature of 19°C (66°F), with highs reaching up to 27°C (81°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec434648535967717266595044
Data source: Temperature data for Alto 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 Alto

In Alto in September, the precipitation amount is 81 mm (3.2 in) over a span of 12 days.

September Precipitation Trends in Alto

The chart displays monthly precipitation patterns in Alto, 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 Alto, September typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec6153839310571764881117167106
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Alto

In Alto in September humidity is 70%. With an average temperature of 19°C (66°F), this humidity feels like a warm blanket enveloping you, making travel a bit sticky and prompting frequent breaks for water as you explore the sights.

September Average Humidity in Alto

This chart illustrates the average monthly humidity levels in Alto, 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 Alto is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%72%69%74%75%72%69%68%70%77%80%76%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Alto

In Alto in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Alto.

Maximum UV Index Levels in Alto for September

The chart shows the monthly maximum UV Index (UVI) for Alto 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 Alto typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2467810997532
Data source: Alto 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 Alto Compares to Other Months

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

This table compares monthly weather conditions in Alto, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)61 mm (2.4 inches)80%low
February Weather8°C (46°F)53 mm (2.1 inches)72%moderate
March Weather9°C (48°F)83 mm (3.3 inches)69%high
April Weather12°C (53°F)93 mm (3.7 inches)74%high
May Weather15°C (59°F)105 mm (4.1 inches)75%very high
June Weather19°C (67°F)71 mm (2.8 inches)72%very high
July Weather22°C (71°F)76 mm (3.0 inches)69%very high
August Weather22°C (72°F)47 mm (1.9 inches)68%very high
September Weather19°C (66°F)81 mm (3.2 inches)70%high
October Weather15°C (59°F)117 mm (4.6 inches)77%moderate
November Weather10°C (51°F)167 mm (6.6 inches)80%moderate
December Weather7°C (45°F)106 mm (4.2 inches)76%low

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